BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Integrable models with staggered disposition of R-matrices:Applica
 tion to the Hall Effect
DTSTART;VALUE=DATE-TIME:20040122T100000Z
DTEND;VALUE=DATE-TIME:20040122T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0414@ictp.it
DESCRIPTION:ABSTRACT:\nA brief review of the Algebraic Bethe Ansatz (ABA) 
 technique and\nthe application  to integrable models with staggered dispos
 ition of \nR-matrices will be presented.\nA set of integrable ladder model
 s based on this generalization of ABA\nwill be formulated.\nThe motivation
  for consideration of integrable models with staggered\ndisposition of R-m
 atrices comes from the phenomenological \nChalker-Coddington (CC) model of
  edge excitations in quantum Hall effect\, \nresponsible for plateau-plate
 au transitions. We present the Action \nformulation of the CC model and av
 erage the Landauer resistance over U(1) phase \ndisorder. It appears\, tha
 t the resultant model is integrable since \ncorresponding Yang-Baxter equa
 tions are satisfied.\n\n//indico.ictp.it/event/a0414/
LOCATION:ICTP MB-2-239
URL://indico.ictp.it/event/a0414/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dynamics of spherical minority game
DTSTART;VALUE=DATE-TIME:20040126T100000Z
DTEND;VALUE=DATE-TIME:20040126T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0418@ictp.it
DESCRIPTION:Abstract: The dynamics of a spherical version of the batch min
 ority game (MG) with random external information will be discussed.  After
  an introduction to the generating functional analysis of MGs and a discus
 sion of the currently available dynamical approximations for the MG's key 
 observable\, the market volatility and for price return autocorrelations\,
  we present a spherical version of the batch MG.  This model is designed t
 o be exactly solvable\, but we find that it still displays a non-trivial p
 hase diagram.  In contrast to standard MG versions\, we can calculate the 
 volatility exactly.  Our study reveals similarities between the spherical 
 and the conventional MG\, but also intriguing differences.\n\n//indico.ict
 p.it/event/a0418/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0418/
END:VEVENT
BEGIN:VEVENT
SUMMARY:TRIGGERING THE SELF-ASSEMBLY OF Au-C HYBRID NANOWIRES
DTSTART;VALUE=DATE-TIME:20040127T123000Z
DTEND;VALUE=DATE-TIME:20040127T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0420@ictp.it
DESCRIPTION:Abstract:\nHelical gold nanowires were experimentally found [1
 ] and their atomic\nstructure theoretically explained [2] very recently.\n
 Below certain critical radius\, they were also found to spontaneously thin
 \ndown to monatomic gold wires\, before final breaking.\nEven though the m
 easured structure of the helical nanowires can be well\nunderstood within 
 ab-initio density functional theory (DFT) [2]\, at this\nlevel of descript
 ion the simplest wires --the monatomic ones--  present\na puzzle:\nDFT the
 oretical predictions of their stability-threshold-distances are far\ntoo s
 hort compared to experimental measurements [3].\nSeveral attempts in order
  to explain what is the origin of these\ndiscrepancies seem to point out t
 he role of light weight impurity\natoms as the most likely factor.\nThe pr
 esence of some impurity atoms\, such as C or S\, could distort easily\nthe
  distances in the monatomic wires while remaining undetected to the\nexper
 imental techniques [4-6].\nAn open question remains to be answered: what a
 re the mechanisms that\npromote the formation of these hybrid nanowires?.\
 nIn the present work\, the formation of a hybrid monatomic nanowire is\nsi
 mulated via ab-initio DFT calculations.\nThe starting point is a short hel
 ical gold nanowire with a single C atom\napproaching its surface.\nThe sim
 ulation shows that at 400 K\, the C atom strongly binds to the wire\nand d
 ives-in very rapidly. In the process\, the local structure undergoes\nnoti
 ceable changes leading to a $sp^3$ coordination of the carbon atom\nwith f
 our surrounding Au atoms.\nThe Mulliken population analysis\, computed for
  this configuration\, reveals\nthat the C atom has withdrawn electrons fro
 m the metallic environment\,\nacquiring a charge of about 0.6 $e$.\nUpon f
 urther stretching\, the helical wires would eventually break and the C\nat
 om becomes a key factor in the formation of the final hybrid monatomic wir
 e.\nThe final structure\, before rupture\, is a 9-atoms-long monatomic wir
 e\nthat connects to one of the tips via a the C atom\, that became\n$sp^3$
 -coordinated with four Au neighbors.\n\n1.\\\\\, Y. Kondo and K. Takayanag
 i\, Science\, {\\\\bf 289}\, 606\, (2000).\\\\\\\\\n2.\\\\\, E. Tosatti\, 
 S. Prestipino\, S. Kostlmeier\, A. Dal Corso\,\nand F. D. Di Tolla\, Scien
 ce {\\\\bf 291}\, 288\, (2001).\\\\\\\\\n3.\\\\\, J. A. Torres\, E. Tosatt
 i\, A. Dal Corso\, F. Ercolessi\, J. Kohanoff\,\nF. D. Di Tolla\, and J.M.
  Soler\, Surf. Sci. Lett. {\\\\bf 426}\, L441 (1999).\\\\\\\\\n4.\\\\\, Da
 niel Kr\\\\\\"uger\, Harald Fuchs\, Roger Rousseau\, Dominik Marx\,\nand M
 ichele Parrinello\, Phys. Rev. Lett. {\\\\bf 89}\, 186402 (2002).  \\\\\\\
 \\n5.\\\\\, Sergio B. Legoas\, Douglas S. Galv\\\\\\"ao\, Varlei Rodrigues
 \,\nand Daniel Ugarte\, Phys. Rev. Lett. {\\\\bf 88}\, 076105 (2002). \\\\
 \\\\\n6.\\\\\, F. D. Novaes\, A. J. R. da Silva\, E. Z. da Silva\, and A. 
 Fazzio\,\nPhys. Rev. Lett. {\\\\bf 90}\, 036101\, (2003).\\\\\\\\\n\n//ind
 ico.ictp.it/event/a0420/
LOCATION:ICTP MB-2-239
URL://indico.ictp.it/event/a0420/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Integrable models with staggered disposition of R-matrices:Applica
 tion to the Hall Effect. II Part
DTSTART;VALUE=DATE-TIME:20040129T100000Z
DTEND;VALUE=DATE-TIME:20040129T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0422@ictp.it
DESCRIPTION:ABSTRACT:\nI will review the Chalker-Coddington (CC) model of 
 edge excitations in the quantum Hall effect\, responsible for plateau-plat
 eau transitions. The\nAction formulation of the CC model and the average o
 f the Landauer \nresistance over U(1) phase disorder will be presented. It
  appears\, that \nthe resultant model is integrable since corresponding Ya
 ng-Baxter \nequations are satisfied.\n\n//indico.ictp.it/event/a0422/
LOCATION:ICTP MB-2-239
URL://indico.ictp.it/event/a0422/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Integrable and Conformal Twisted Boundary Conditions of Lattice Mo
 dels
DTSTART;VALUE=DATE-TIME:20040130T100000Z
DTEND;VALUE=DATE-TIME:20040130T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0419@ictp.it
DESCRIPTION:Abstract:\nIn this seminar\, I will talk about the integrable 
 lattice realizations of\nconformal twisted boundary conditions for $sl(2)$
  unitary minimal models.\nThe conformal field theories are realized as the
  continuum scaling limit\nof critical $A$-$D$-$E$ lattice models with posi
 tive spectral parameter.\nThese integrable seam boundary conditions are as
 sociated with the nodes of\nOcneanu quantum graph. The talk is at introduc
 tary level.\n\n//indico.ictp.it/event/a0419/
LOCATION:ICTP MB-2-239
URL://indico.ictp.it/event/a0419/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Adsorption of organic molecules on semiconductor surfaces from fir
 st principles: 3-pyrroline (C4H7N) and ethanol (C2H6O) on Si(100)
DTSTART;VALUE=DATE-TIME:20040203T123000Z
DTEND;VALUE=DATE-TIME:20040203T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0427@ictp.it
DESCRIPTION://indico.ictp.it/event/a0427/
LOCATION:ICTP MB-2-239
URL://indico.ictp.it/event/a0427/
END:VEVENT
BEGIN:VEVENT
SUMMARY:2D massless boson\, quantum sine-Gordon model and bosonization:  E
 lementary introduction - Part I
DTSTART;VALUE=DATE-TIME:20040205T100000Z
DTEND;VALUE=DATE-TIME:20040205T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0428@ictp.it
DESCRIPTION:ABSTRACT: These lectures are complementary to the introduction
  to Conformal Field Theory given recently by Marina Huerta. Their goal is 
 to show how main ideas and mathematical structures of the formal CFT appro
 ach show up in a simple and well-known example --  the 2D Gaussian model (
 free massless boson). We will also consider a typical deformation of this 
 theory\, the 2D sine-Gordon model\, that displays a topological (Berezinsk
 ii-Kosterlitz-Thouless) transition. Questions related to fermion-boson dem
 ocracy will be finally discussed.\n\n//indico.ictp.it/event/a0428/
LOCATION:ICTP MB-2-239
URL://indico.ictp.it/event/a0428/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Properties of Large Organic Molecules at Metal Surfaces by STM
DTSTART;VALUE=DATE-TIME:20040210T123000Z
DTEND;VALUE=DATE-TIME:20040210T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0436@ictp.it
DESCRIPTION://indico.ictp.it/event/a0436/
LOCATION:ICTP MB-2-239
URL://indico.ictp.it/event/a0436/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Self-organized Critical Network Dynamics
DTSTART;VALUE=DATE-TIME:20040211T150000Z
DTEND;VALUE=DATE-TIME:20040211T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0433@ictp.it
DESCRIPTION:Abstract: Networks are a general framework by which we can des
 cribe a large class of many-body systems of interacting elements. We will 
 propose a model that describes in a stylized way how local breakdowns due 
 for example to congestion problems may shape the structure of a network.\n
 The model converges to a self-organized critical stationary state in which
  the network structure results as a consequence of avalanches of rewiring 
 processes. Depending on the model's specification\, we obtain either singl
 e scale or scale-free networks. We characterize in detail the relation bet
 ween the statistical properties of the network and the nature of the criti
 cal state\, by computing the critical exponents. The model also displays a
  non-trivial\, sudden\, collapse to a complete network.\n\n//indico.ictp.i
 t/event/a0433/
LOCATION:ICTP MB-2-239
URL://indico.ictp.it/event/a0433/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Large Effects of interactions and different geometries on conducta
 nces of quantum wires: the ring and stub systems
DTSTART;VALUE=DATE-TIME:20040212T100000Z
DTEND;VALUE=DATE-TIME:20040212T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0439@ictp.it
DESCRIPTION:ABSTRACT: We examine the effect of interactions between the el
 ectrons on the\nLandauer-B\\\\\\"uttiker conductances of some systems of q
 uantum wires with\ndifferent geometries. The systems include a wire with a
  stub in the\nmiddle\, and a wire containing a ring which can enclose a ma
 gnetic flux.\nThe electrons in each of the wires is taken to be weakly int
 eracting\,\nand scattering matrices are introduced at all the junctions pr
 esent in\nthe systems. Using a renormalization group method developed rece
 ntly\, we\ncompute the conductances of these systems as functions of the t
 emperature\nand the wire lengths. We present results for high\, intermedia
 te and low\ntemperatures which correspond respectively to the thermal cohe
 rence length\nbeing smaller than\, comparable to and larger than the small
 est wire length\nin the different systems\, i.e.\, the length of the stub 
 or each arm of the\nring. The renormalization group procedure and the form
 ulae used to compute\nthe conductances are different in the three regimes.
  Our results show that\nthe Landauer-B\\\\\\"uttiker conductances of vario
 us systems of experimental\ninterest depend on the temperature and lengths
  in a non-trivial way when\ninteractions are taken into account.\n\n//indi
 co.ictp.it/event/a0439/
LOCATION:ICTP MB-2-239
URL://indico.ictp.it/event/a0439/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The molecular mechanisms of vision: insights in the activation pat
 hway of Rhodopsin from classical and mixed quantum-classical MD studies
DTSTART;VALUE=DATE-TIME:20040217T123000Z
DTEND;VALUE=DATE-TIME:20040217T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0444@ictp.it
DESCRIPTION://indico.ictp.it/event/a0444/
LOCATION:ICTP MB-2-239
URL://indico.ictp.it/event/a0444/
END:VEVENT
BEGIN:VEVENT
SUMMARY:2D massless boson\, quantum sine-Gordon model and bosonization:  E
 lementary introduction. Part II
DTSTART;VALUE=DATE-TIME:20040219T100000Z
DTEND;VALUE=DATE-TIME:20040219T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0446@ictp.it
DESCRIPTION:ABSTRACT:\nThese lectures are complementary to the introductio
 n to Conformal\nField Theory given recently by Marina Huerta. Their goal i
 s to show \nhow main ideas and mathematical structures of the formal CFT a
 pproach\nshow up in a simple and well-known example --  the 2D Gaussian mo
 del\n(free massless boson). We will also consider a typical deformation of
  \nthis theory\, the 2D sine-Gordon model\, that displays a topological \n
 (Berezinskii-Kosterlitz-Thouless) transition. Questions related to \nfermi
 on-boson democracy will be finally discussed.\n\n//indico.ictp.it/event/a0
 446/
LOCATION:ICTP MB-2-239
URL://indico.ictp.it/event/a0446/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Microscopic Mechanism of antibiotics Translocation through a porin
DTSTART;VALUE=DATE-TIME:20040224T123000Z
DTEND;VALUE=DATE-TIME:20040224T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0449@ictp.it
DESCRIPTION://indico.ictp.it/event/a0449/
LOCATION:ICTP MB-2-239
URL://indico.ictp.it/event/a0449/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Wigner delay time: beyond the Random Matrix Theory
DTSTART;VALUE=DATE-TIME:20040226T100000Z
DTEND;VALUE=DATE-TIME:20040226T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0456@ictp.it
DESCRIPTION:ABSTRACT:\nThe time duration of a scattering process in quantu
 m mechanics can be\ncharacterized  by the so called Wigner delay time. Sta
 tistical approach\nto the scattering problems in mesoscopic physics is usu
 ally  based on\nthe random matrix theory (RMT). The application of the RMT
  is limited\nhowever to the situations where there are no non-trivial ener
 gy or length\nscales in the system. In this talk the opposite situation is
 \nconsidered. Namely\, the statistical properties of the Wigner delay time
 s\nare investigated for different models of disordered and chaotic systems
 \nexhibiting diffusion or localization.Wigner delay time: beyond the Rando
 m Matrix Theory\n\n//indico.ictp.it/event/a0456/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0456/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Effects of system size and time scale in classical molecular dynam
 ics \nsimulations of Water
DTSTART;VALUE=DATE-TIME:20040302T123000Z
DTEND;VALUE=DATE-TIME:20040302T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0460@ictp.it
DESCRIPTION://indico.ictp.it/event/a0460/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0460/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Flow-induced voltage along single-walled carbon nanotubes
DTSTART;VALUE=DATE-TIME:20040303T150000Z
DTEND;VALUE=DATE-TIME:20040303T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0459@ictp.it
DESCRIPTION://indico.ictp.it/event/a0459/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0459/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Electrospray-ionization mass spectrometry for protein conformation
 al studies
DTSTART;VALUE=DATE-TIME:20040309T123000Z
DTEND;VALUE=DATE-TIME:20040309T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0467@ictp.it
DESCRIPTION://indico.ictp.it/event/a0467/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0467/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tails of the Density of States in a Random Magnetic Field
DTSTART;VALUE=DATE-TIME:20040311T100000Z
DTEND;VALUE=DATE-TIME:20040311T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0468@ictp.it
DESCRIPTION://indico.ictp.it/event/a0468/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0468/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Drug DNA interactions: A QM/MM study
DTSTART;VALUE=DATE-TIME:20040316T123000Z
DTEND;VALUE=DATE-TIME:20040316T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0472@ictp.it
DESCRIPTION:The most promising anticancer drugs nowadays target DNA. There
 fore\, a\nprofoundunderstanding of drug-DNA interactions is important in d
 rug\ndesign. In this regard\, we have studied two anticancer drugs\, namel
 y\ncisplatin and duocarmycin. We used mixed quantum/classical molecular\nd
 ynamics simulations in a DFT/plane waves scheme in order to study the\nstr
 uctural changes of DNA upon cisplatin binding and the chemical\nreactivity
  in water. To validate the results\, comparison between different\nexchang
 e and correlation functionals is made.\n\n//indico.ictp.it/event/a0472/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0472/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Smart structures
DTSTART;VALUE=DATE-TIME:20040317T150000Z
DTEND;VALUE=DATE-TIME:20040317T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0471@ictp.it
DESCRIPTION:Abstract: Smart or adaptronic structures are structures with a
 n ability to respond in a pre-defined useful and efficient manner to chang
 ing environmental conditions\, including any changes in their own conditio
 n.  Since they are designed and used by human beings\, the overall design 
 philosophy should encompass the role of the human user also.  Another view
 point is that they are nothing but a synonym for good engineering. They sh
 ould possess characteristics close to\, and\, if possible\, exceeding thos
 e found in bio-materials. Adaptability is their main feature.  In the so-c
 alled passively smart materials\, this comes about as a standby property. 
 But in actively smart materials or structures there has to be a field-tuna
 bility of properties. This\, in turn\, requires nonlinear response.  The v
 icinity of a ferroic phase transition at the temperature of application pr
 ovides the nonlinearity feature. But there are also several other ways of 
 achieving nonlinear response. Use of soft matter is one such way. Exploita
 tion of mesoscopic structure is another.  Mimicking biological structures 
 also entails the incorporation of a “brain” or control centre.  Advanc
 es in artificial intelligence and neural networks continue to provide the 
 impetus to the field of smart structures.  An overview of the subject will
  be given.\n\n//indico.ictp.it/event/a0471/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0471/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SYMMETRIES AND BROKEN SYMMETRIES IN CONDENSED-MATTER PHYSICS
DTSTART;VALUE=DATE-TIME:20040318T100000Z
DTEND;VALUE=DATE-TIME:20040318T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0473@ictp.it
DESCRIPTION:Symmetry and invariance principles have played a vital role in
  the \ndevelopment of physics. And just about as ubiquitous as symmetry is
  the \nspontaneous breaking of symmetry. In particular\, broken symmetry i
 s the \nbasic underlying concept of condensed-matter physics. Crystal grow
 th and \nother phase transitions are phenomena involving spontaneous break
 ing of \nsymmetry. Generalised rigidity\, as also topological defects like
  \ndislocations\, are some of the consequences of the breaking of symmetry
  \ninvolved in the formation of a crystal from the highly symmetric fluid 
 \nphase. The Curie principle\, or rather its generalisation called the \nC
 urie-Shubnikov principle\, is the basic symmetry principle of physics. Of 
 \nparticular interest is the application of this principle to composite \n
 objects made up of equal parts (crystals are examples of such composite \n
 objects because they are made up of equal parts called unit cells). For \n
 such objects the possibility of the manifestation of a new type of \nsymme
 try called latent symmetry has been pointed out recently by the \nspeaker 
 in his book on ferroic materials. Latent symmetry is that \nunexpected ext
 ra symmetry which can arise sometimes when two or more \nidentical objects
  combine to form a composite in a specific way. The \nnotion of partial sy
 mmetry is familiar in crystallography: it is a local \nsymmetry\, rather t
 han a global symmetry. Subunits of the object may be \nrelated by a partia
 l symmetry\, but the object as a whole does not have \nthat symmetry. By c
 ontrast\, latent symmetry is that partial symmetry of a \nsubunit of the b
 asic components of a composite made up of equal parts \nwhich is also a gl
 obal symmetry of the composite.\n\n//indico.ictp.it/event/a0473/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0473/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Segregation Mechanisms in a Model of an Experimental Binary Granul
 ar Mixture
DTSTART;VALUE=DATE-TIME:20040325T100000Z
DTEND;VALUE=DATE-TIME:20040325T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0474@ictp.it
DESCRIPTION:Recent experimental studies of a vibrated granular bed consist
 ing of two \nparticle types have shown a transition from a mixed to a segr
 egated state \nas the filling fraction is varied.  A model of the system i
 s introduced \nand investigated numerically.  Many of the experimentally o
 bserved \nfeatures are reproduced and it is shown that the mixed state to 
 segregated \nstate transition is a robust phenomenon.  The model is used t
 o investigate \nand elucidate the segregation mechanism(s) present in the 
 experiment.\n\n//indico.ictp.it/event/a0474/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0474/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Classical-to-quantum crossover and weak localization in the kicked
  quantum rotor
DTSTART;VALUE=DATE-TIME:20040401T100000Z
DTEND;VALUE=DATE-TIME:20040401T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0475@ictp.it
DESCRIPTION:The kicked quantum rotor (a particle freely moving on a circle
 \nsubject to periodic delta-kicks) has been studied for decades\nand is on
 e of the most popular models of quantum chaos. The\ndynamics of the classi
 cal version of the model corresponds\nto the diffusive random walk in the 
 angular momentum space\nand constant energy absorption. The quantum dynami
 cs\nexhibits a phenomenon of the dynamic localization\n(suppression of the
  classical diffusion by destructive quantum\ninterference)\, as was discov
 ered numerically by Casati et al. in\n1979\, and was believed to be proven
  analytically in 1996 by\nAltland and Zirnbauer. I would like to discuss a
  very recent\npreprint by Tian\, Kamenev and Larkin (cond-mat/0403482) whi
 ch\nreexamines the question of quantum corrections to the diffusion\,\nand
  brings to light certain effects apparently missed by the\napproach of Alt
 land and Zirnbauer\n\n//indico.ictp.it/event/a0475/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0475/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rumor-like information dissemination in complex computer networks
DTSTART;VALUE=DATE-TIME:20040407T163000Z
DTEND;VALUE=DATE-TIME:20040407T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0483@ictp.it
DESCRIPTION:Abstract: An interesting dynamic process taking place in netwo
 rks is the spontaneous spreading of information via rumor-like mechanisms.
   In addition to its relevance to social sciences\, such mechanisms also f
 orm the basis of an important class of data dissemination protocols in com
 puter and communication networks.  These protocols\, generally known as ep
 idemic-style or gossip protocols\, have recently gained prominence as a ro
 bust and scalable methodology for group communications in large distribute
 d systems.\n	In this talk I will describe the results of our Monte Carlo s
 imulation studies of the impact of network architecture on the dynamics of
  gossip protocols in computer networks with scale-free and random graph co
 nnection topologies.  \n	Our studies provide new insights in the complex (
 and rather unexpected ) interplay between the gossip process and the under
 lying network topology.  An analytical model of gossip dynamics in these n
 etworks will be presented.\n\n//indico.ictp.it/event/a0483/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0483/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Probability of correct detection and size of the structured input
DTSTART;VALUE=DATE-TIME:20040415T160000Z
DTEND;VALUE=DATE-TIME:20040415T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0489@ictp.it
DESCRIPTION:keywords: Hidden Markov Model\, window size / receptive field\
 , bayesian statistics\, information theory\n\nAbstract:\n\nConsider an inp
 ut which has the structure of a Hidden Markov Model (HMM).\nThe values of 
 each of the hidden variables probabilistically depends only on\nthe values
  of the neighboring ones\, and these are accessible only through\nnoisy ch
 annels.\nIn the case of a finite HMM\, using belief propagations algorithm
 s\, we\ncalculated analytically in simple cases the probability of correct
 \ndetection of a given hidden variable as a function of the size of the HM
 M.\nUsing information theory\, one thus defines a window size / receptive 
 field\nof the HMM\, which corresponds to the set of observations which are
 \nrelevant to the detection of the given hidden variable.\n\n//indico.ictp
 .it/event/a0489/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0489/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Can strong correlation enhance superconductivity ?
DTSTART;VALUE=DATE-TIME:20040415T100000Z
DTEND;VALUE=DATE-TIME:20040415T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0490@ictp.it
DESCRIPTION:In the seminar I will present recent results concerning the in
 terplay of\nstrong correlations and superconductivity. In particular\nI wi
 ll show that there exist pairing channels orthogonal to strong\ncorrelatio
 n\, which are actually enhanced\, even enormously\, in the \nproximity of 
 a Mott metal-insulator transition. Since the results have \nbeen obtained 
 by the Dynamical Mean Field Theory (DMFT)\, I will first \nbriefly outline
  this technique. This will force me to discuss Anderson \nimpurity models 
 which naturally arise within DMFT. I will try to argue \nthat these Anders
 on impurity models are not just a mere trick to solve \nDMFT\, but unveil 
 a kind of local criticality which arises in many \nstrongly correlated met
 als near a Mott transition.\nI will discuss how this criticality influence
 s the onset of bulk \ncoherence\, with particular emphasis on models for s
 trongly correlated \nsuperconductors.\n\n//indico.ictp.it/event/a0490/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0490/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Can strong correlation enhance superconductivity ? Part II
DTSTART;VALUE=DATE-TIME:20040420T100000Z
DTEND;VALUE=DATE-TIME:20040420T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0495@ictp.it
DESCRIPTION:In the seminar I will present recent results concerning the in
 terplay of\nstrong correlations and superconductivity. In particular\nI wi
 ll show that there exist pairing channels orthogonal to strong\ncorrelatio
 n\, which are actually enhanced\, even enormously\, in the \nproximity of 
 a Mott metal-insulator transition. Since the results have \nbeen obtained 
 by the Dynamical Mean Field Theory (DMFT)\, I will first \nbriefly outline
  this technique. This will force me to discuss Anderson \nimpurity models 
 which naturally arise within DMFT. I will try to argue \nthat these Anders
 on impurity models are not just a mere trick to solve \nDMFT\, but unveil 
 a kind of local criticality which arises in many \nstrongly correlated met
 als near a Mott transition.\nI will discuss how this criticality influence
 s the onset of bulk \ncoherence\, with particular emphasis on models for s
 trongly correlated \nsuperconductors.\n\n//indico.ictp.it/event/a0495/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0495/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Elasticity of biopolymers:  A coarse grained approach
DTSTART;VALUE=DATE-TIME:20040421T153000Z
DTEND;VALUE=DATE-TIME:20040421T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0496@ictp.it
DESCRIPTION://indico.ictp.it/event/a0496/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0496/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Theory of Driven Chaotic Systems\, Random Matrix Theory and the Se
 miclassical limit
DTSTART;VALUE=DATE-TIME:20040422T100000Z
DTEND;VALUE=DATE-TIME:20040422T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0499@ictp.it
DESCRIPTION:Quantized chaotic systems are generically characterized by two
  energy \nscales: the mean level spacing and the bandwidth. \nThis implies
  that with respect to driving such systems have an adiabatic\, \na perturb
 ative and a non-perturbative regimes. A \\"strong\\" quantal \nnon-perturb
 ative response effect is found for systems that are described \nby random 
 matrix theory models.\nIs there a similar effect for quantized \\"chaotic\
 \" systems ? \nTheoretical arguments cannot exclude the existence of a \\"
 weak\\" \nnon-perturbative response effect\, but detailed numerical invest
 igations \nresults in an unexpected degree of semiclassical correspondence
 .\n\n//indico.ictp.it/event/a0499/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0499/
END:VEVENT
BEGIN:VEVENT
SUMMARY:What determines the menu of the native-state folds of proteins
DTSTART;VALUE=DATE-TIME:20040428T103000Z
DTEND;VALUE=DATE-TIME:20040428T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04101@ictp.it
DESCRIPTION:Abstract: We present a simple physical model which demonstrate
 s that the native state folds of proteins can emerge on the basis of consi
 derations of geometry and symmetry.  We show that the inherent anisotropy 
 of a chain molecule\, the geometrical and energetic constraints placed by 
 the hydrogen bonds and sterics\, and hydrophobicity are sufficient to yiel
 d a free energy landscape with broad minima even for a homopolymer.  These
  minima correspond to marginally compact structures comprising the menu of
  folds that proteins choose from to house their native-states in.  Our res
 ults provide a general framework for understanding the common characterist
 ics of globular proteins.\n\n//indico.ictp.it/event/a04101/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a04101/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A Model of Wavefunction Collapse for a Unified Micro- and Macro-Dy
 namics
DTSTART;VALUE=DATE-TIME:20040429T100000Z
DTEND;VALUE=DATE-TIME:20040429T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04105@ictp.it
DESCRIPTION:Collapse models aim at describing\, whithin one single dynamic
 al equation\,\nboth the quantum properties of microscopic systems and the 
 classical\nproperties of macroscopic objects.  \n\nWe discuss the properti
 es of a stochastic differential equation describing\nthe evolution of a fr
 ee particle subject to space-localizations.\nIn particular\, we will see t
 hat: \n\na) At the microscopic level the stochastic terms affect in a negl
 igible\nway the quantum properties of the system: accordingly\, the model 
 recovers\nall know predictions of Quantum Mechanics. \n\nb) At the macrosc
 opic level\, the wavefunction of the center of mass of a\nmacro-object is 
 very well localized in space and it moves obeying the\nclassical laws of m
 otion.\n\n//indico.ictp.it/event/a04105/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04105/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kondo resonance revisited
DTSTART;VALUE=DATE-TIME:20040510T130000Z
DTEND;VALUE=DATE-TIME:20040510T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04108@ictp.it
DESCRIPTION:Abstract: After a brief introduction of the Kondo resonance st
 udy on quantum dots and using STM on metallic surfaces\, two pieces of wor
 k will be described: \n1) Fano resonance in Anderson impurity systems.  It
  is shown that the broadening of the impurity level leads to an additional
  and important contribution to the Fano resonance around the Fermi energy\
 , especially in the mixed valence regime.  This contribution comes from th
 e interference of the Kondo resonance and the broadened impurity level.  T
 he theory can quantitatively explain the STM data not only for systems lik
 e Co on Au/Ag/Cu surfaces\, but also for Ti on Au/Ag surfaces. (Ref.  cond
 -mat/0311533). \n2) Swapping entangled Kondo resonances in parallel-couple
 d double quantum dots.  It is shown that in the Kondo regime with degenera
 te dot levels\, the bonding and antibonding states of the Kondo resonances
  can be swapped by changing the interdot exchange integral and/or the asym
 metric dot-lead coupling ratio.  In principle\, this process can be used t
 o realize an XOR gate for the quantum computation. (Ref.  cond-mat/0403629
 ).\n\n//indico.ictp.it/event/a04108/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04108/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Fusion Hierarchies of Critical A-D-E Lattice Models
DTSTART;VALUE=DATE-TIME:20040513T100000Z
DTEND;VALUE=DATE-TIME:20040513T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04115@ictp.it
DESCRIPTION:In 1987\, Pasquier constructed the critical A-D-E lattice mode
 ls whose \npartition functions are found to be identical to the modular in
 variant \npartition functions of unitary minimal models in conformal field
  theory. \nIn this talk\, I will introduce the A-D-E models and show how t
 o construct \nnew models from the existing ones by a process called fusion
 . The fusion \nprocedure is used to construct integrable boundary conditio
 ns and to \nderive the functional equations which can be solved to give th
 e spectra of the \ntransfer matrices.\n\n//indico.ictp.it/event/a04115/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04115/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Exact solution of a linear molecular motor model driven by two-ste
 p fluctuations and subject to protein friction
DTSTART;VALUE=DATE-TIME:20040519T150000Z
DTEND;VALUE=DATE-TIME:20040519T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04116@ictp.it
DESCRIPTION:Abstract: We investigate by analytical means the stochastic eq
 uations of motion of a linear molecular motor model based on the concept o
 f protein friction.  Solving the coupled Langevin equations originally pro
 posed by Mogilner et al.\, and averaging over both the two-step internal c
 onformational fluctuations and the thermal noise\, we present explicit\, a
 nalytical expressions for the average motion and the velocity-force relati
 onship.\n\n//indico.ictp.it/event/a04116/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a04116/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mechanical Properties and Enzymatic Function of Aspartic Proteases
DTSTART;VALUE=DATE-TIME:20040520T123000Z
DTEND;VALUE=DATE-TIME:20040520T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04121@ictp.it
DESCRIPTION:Abstract: The biological function of the homodimeric retropeps
 in HIV-1 Aspartic protease has recently been related to the conformational
  flexibility of its structural scaffold. Here we address the fundamental i
 ssue on whether such mechanism is present also in the other known fold of 
 aspartic proteases\, that is the asymmetric monomeric fold typical of the 
 eukariotic isoenzymes (pepsins). We investigate the mechanisms governing t
 he enzymatic activity of a typical member of the pepsin family\, human $\\
 beta$-secretase\, through classical MD and hybrid Car-Parrinello MD simula
 tions. As for the viral isoenzyme\, the reaction free energy is found to b
 e strongly modulated by a set of large-scale conformational fluctuations o
 f the protein. By using a suitable coarse-grained scheme and multiple sequ
 ence alignment techniques we learn that the mechanical response of all mem
 bers of the pepsin family is analogous to the $\\beta$-secretase one. In p
 articular\, we find that the conserved residues identify three regions of 
 the protein\, located around the cleavage-site cavity\, in the four $\\bet
 a$-sheets cross-linking the two lobes\, and in a solvent-exposede region b
 elow the long $\\beta$-hairpin in the N-terminal lobe. Residuese in these 
 sets play specific roles in the mechanical properties of the enzyme and ye
 t are very little mobile. The ubiquity of these features in all analyzed s
 tructures suggest that aspartic proteases have been evolutionary selected 
 to possess similar functional motions which\, in turn\, preserve the enzym
 atic activity mechanisms despite the observed fold variations.\n\n//indico
 .ictp.it/event/a04121/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04121/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Transport through interacting quantum wires
DTSTART;VALUE=DATE-TIME:20040520T100000Z
DTEND;VALUE=DATE-TIME:20040520T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04123@ictp.it
DESCRIPTION:The interplay of electron correlations and impurities in one-d
 imensional \nelectron systems leads to striking effects in the low energy 
 physics. The \nconductance in addition depends strongly on the properties 
 of the contacts \n(``adiabatic'' versus ``abrupt'').\nResults for the cond
 uctance using a functional renormalization group (fRG)\napproach which is 
 perturbative in the two-body interaction\,\nbut non-perturbative in the im
 purity strength are presented. The comparison \nwith exact numerical resul
 ts for small chain length shows that the truncated \nfRG is surprisingly a
 ccurate even for moderate interaction strength \n(cond-mat/0304517).\nAfte
 r presenting fRG results for the scaling function in the case of a \nsingl
 e  impurity  the resonant tunneling through a double barrier is \ndiscusse
 d. Calculations of the peak conductance G_p(T) as a function of \ntemperat
 ure T over several decades show parameter regimes with distinctive \npower
  law behaviour. For intermediate dot parameters and T of the order \nof th
 e level spacing of the dot\,  G_p(T) is shown to decrease for \ndecreasing
  T in a non-universal way. No regime of ``correlated sequential \ntunnelin
 g'' is found (cond-mat/0304655).\nAbrupt contacts and more complicated geo
 metries\, like ``Y-junctions'' are \ndiscussed shortly.\n\n//indico.ictp.i
 t/event/a04123/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04123/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Pressure-induced amorphization\, martensitic transformations and t
 he memory glass effect
DTSTART;VALUE=DATE-TIME:20040521T123000Z
DTEND;VALUE=DATE-TIME:20040521T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04124@ictp.it
DESCRIPTION:A large class of materials are known to transform from a cryst
 alline to an \namorphous structure under pressure changes at constant temp
 erature. Among \nothers\, typical materials are water (H2O)\, quartz (SiO2
 ) and berlinite \n(AlPO4). \nOne of the striking  (though rather controver
 sial) properties observed in \nsome pressure-induced amorphous materials i
 s the so-called memory glass \neffect: when the amorphous sample is decomp
 ressed\, the initial crystalline \nstructure is recovered\, conserving the
  original crystal orientation.\n\nHere\, a model of interacting particles 
 in two dimensions is studied in \norder to address some issues related to 
 pressure induced amorphization and \nthe memory glass effect. Two limit sc
 enarios are presented according to the \nnature of the mechanical instabil
 ities underlying the transformation: a direct\ncrystal-to-amorphous transf
 ormation and a martensitic transformation. In \nthe last case the product 
 phase can be a poly-crystal with a very small \ngrain size and the materia
 l can be easily taken as an amorphous material. \nThe memory of this \\"am
 orphous\\" structure is a natural consequence of the \nunderlying martensi
 tic transformation.\n\n//indico.ictp.it/event/a04124/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04124/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Constrained molecular dynamics and variational principles in quant
 um chemistry: efficient exploration of conical intersection seams.
DTSTART;VALUE=DATE-TIME:20040527T123000Z
DTEND;VALUE=DATE-TIME:20040527T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04132@ictp.it
DESCRIPTION:Conical intersections (CI) are regions of the potential energy
  landscape\nof a chemical system where two or more energy surfaces cross a
 nd the\nquantum levels are degenerate.\nThey have an interesting topologic
 al structure\, and their existence is\nsignalled by particular geometric p
 roperties (the concept of \\"Berry phase\\"\nwas introduced in this framew
 ork).\nIndeed\, the importance of CIs has grown in the last years in the f
 ield of\nphotochemistry\, since they can represent a very fast reaction ch
 annel for the decay of a\nphotochemically excited system.\nAn efficient ex
 ploration of these gapless regions can help both in\ninterpreting the expe
 rimental data and in suggesting new reaction\nmechanisms. To this end\, we
  have developed a strategy based\nupon the methods of constrained molecula
 r dynamics and the variational\nprinciples of classical mechanics. This st
 rategy\, coupled with high\naccuracy quantum chemistry schemes\, will be d
 iscussed in this seminar\,\ntogether with possible applications to realist
 ic systems.\n\n//indico.ictp.it/event/a04132/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04132/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum Monte Carlo based on two-body density functional theory fo
 r fermionic many-body systems: application to $^3$He
DTSTART;VALUE=DATE-TIME:20040622T123000Z
DTEND;VALUE=DATE-TIME:20040622T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04167@ictp.it
DESCRIPTION:The quantum many-body problem for interacting fermions is not 
 without its challenges.  Computational methods\, [Hartree-Fock (HF)\, dens
 ity-functional theory (DFT)\, quantum Monte Carlo (QMC)] methods have aide
 d greatly in our understanding of systems containing interacting fermions.
   In this study we explore the possibility of constructing a QMC algorithm
  based on using the two-body density as the fundamental variable.  The fac
 t that the two-body density can be used as a fundamental variable (that is
  that the energy can be written as a functional of the two-body density\, 
 and that minimizing the energy as a functional of the two-body density lea
 ds to the ground state energy) can be demonstrated via a simple extension 
 of the proofs for DFT performed originally by Hohenberg and Kohn and later
  extended to $N$-representable densities by Levy.  For the construction of
  a fermionic QMC algorithm we invoke an auxiliary interacting bosonic syst
 em which is required to have the same two-body density as the interacting 
 fermionic system to be investigated (recall that.standard DFT was made int
 o an applicable method via invoking an auxiliary non-interacting system). 
  Such an ansatz leads to an additive correction term in the expression for
  the ground state energy.  We approximate the correction term using Jastro
 w and Jastrow-Slater type wavefunctions.  Since our approximate correction
  term can be written as an additive two-body and three-body potential\, th
 e ground state energy can be evaluated by the standard QMC algorithms for 
 systems of interacting bosons.  We perform calculations on $^3$He\, and de
 monstrate that quantitative results can be obtained from our method.\nIn p
 articular our energies show good agreement with other calculations where e
 quivalent levels of approximation were used (fixed-node quantum Monte Carl
 o without backflow and without three-body correlation). Other properties t
 hat we have calculated (potential energy\, static structure factor\, radia
 l distribution function) are also in good agreement with experiment\, and 
 previous calculations.\n\nRelated Articles:\n\nP. Hohenberg and W. Kohn\, 
 Phys. Rev. 136B\, 864 (1964).\n\nW. Kohn and L.~J. Sham\, Phys. Rev. 140\,
  A1133 (1965).\n\nM. Levy\, Proc. Nat. Acad. Sci. USA 76\, 6062 (1979).\n\
 nS. Moroni\, S. Fantoni\, and G. Senatore\, Phys. Rev. B 52\, 13547 (1995)
 .\n\nJ. Casulleras and J. Boronat\, Phys. Rev. Lett. 84\, 3121 (2000).\n\n
 //indico.ictp.it/event/a04167/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04167/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Scaling and universality in polymer solutions from relativistic se
 lf-diffusion concepts.
DTSTART;VALUE=DATE-TIME:20040624T151500Z
DTEND;VALUE=DATE-TIME:20040624T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04170@ictp.it
DESCRIPTION://indico.ictp.it/event/a04170/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a04170/
END:VEVENT
BEGIN:VEVENT
SUMMARY:FIRST PRINCIPLES CALCULATIONS OF QUANTUM TRANSPORT IN NANOSTRUCTUR
 ES
DTSTART;VALUE=DATE-TIME:20040706T123000Z
DTEND;VALUE=DATE-TIME:20040706T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04175@ictp.it
DESCRIPTION:Abstract:\nDetermining the quantum ballistic conductance of a 
 nanosystem has\nbecome of primary interest in recent years for the promise
  of novel\ntechnological applications for nanoscale quantum electronic\nde
 vices. In particular\, on the theoretical side\, a fully first\nprinciple 
 theory of electronic transport is highly desirable. In this\ntalk I will d
 iscuss recent advances in the development of efficient\ntechniques to comp
 ute quantum conductance from first principles and\nshow examples of protot
 ypical applications\, ranging from atomic chains\nto carbon nanotubes and 
 nanotube assemblies.\n\n//indico.ictp.it/event/a04175/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04175/
END:VEVENT
BEGIN:VEVENT
SUMMARY:INTRALAYER DIFFUSION PROCESSES RELEVANT TO THE GROWTH OF FCC(110) 
 METAL SURFACES
DTSTART;VALUE=DATE-TIME:20040728T090000Z
DTEND;VALUE=DATE-TIME:20040728T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04251@ictp.it
DESCRIPTION:Abstract:  We use molecular dynamics simulation to produce a m
 ap of the\nadatom migration barriers on fcc(110) metal surfaces. The metal
 s have been\nmodeled by many-body potentials within the second moment appr
 oximation to\nthe tight-binding model. The estimated barriers are found to
  be influenced\nby the proximity of steps and terrace size. For each metal
 \, the onset\ntemperatures of some important diffusion processes are estim
 ated through a\n1-d exactly solvable growth model constructed to describe 
 the growth along\nthe [001] and the [1$\\\\overline{1}$0] directions separ
 ately.\n\n//indico.ictp.it/event/a04251/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a04251/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The onset of chaotic symbolic synchronization between population i
 nversions in an array of weakly-coupled Bose-Einstein condensates
DTSTART;VALUE=DATE-TIME:20040802T163000Z
DTEND;VALUE=DATE-TIME:20040802T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04296@ictp.it
DESCRIPTION:We investigate the onset of chaotic dynamics of the one-dimens
 ional discrete nonlinear Schrödinger equation (DNLSE) with periodic bound
 ary conditions in the presence of a single on-site defect. This model desc
 ribes a ring of weakly-stochasticity in three different scenarios. We make
  use of a suitable Poincaré surface of section and continuation methods. 
 The global stochasticity is characterized by chaotic symbolic synchronizat
 ion between the population inversions of certain pairs of condensates. We 
 were able to follow the motion along the stochastic layers of different re
 sonances in the chaotic self-trapping regime. Moreover\, the time series o
 f the Poincaré cycles suggests that in the global stochasticity regime th
 e dynamics is\, to some extent\, Markovian\, in spite of the fact that the
  condensates are phase locked with almost the same phase. This phase locki
 ng induces a peculiar local interference in the matter waves of the conden
 sates.\n\n//indico.ictp.it/event/a04296/
LOCATION:ICTP MB-Terrace Level-D
URL://indico.ictp.it/event/a04296/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Towards a new information theory
DTSTART;VALUE=DATE-TIME:20040805T090000Z
DTEND;VALUE=DATE-TIME:20040805T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04305@ictp.it
DESCRIPTION://indico.ictp.it/event/a04305/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a04305/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics:\n"Efficiency of a Monte-C
 arlo algorithm for linear and branched polymers"
DTSTART;VALUE=DATE-TIME:20040914T150000Z
DTEND;VALUE=DATE-TIME:20040914T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04325@ictp.it
DESCRIPTION:In this talk\, I will discuss the efficiency of Incomplete-Enu
 meration(IE) Monte-Carlo algorithm for linear and branched polymers.  IE i
 s a genetic type MC algorithm which randomly generates a small number of c
 onfigurations in each run.  We find that there is a qualitative difference
  in the efficiency of the algorithm for the two kinds of polymers.  For li
 near polymers the time to generate an independent sample of n monomers for
  large n increases as a polynomial in n but for branched polymers it incre
 ases as a stretched exponential(exp(cn^a)\, 0<a<1).\n\n//indico.ictp.it/ev
 ent/a04325/
LOCATION:ICTP (Main Building Room 239) Main Building Room 239
URL://indico.ictp.it/event/a04325/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar\n"Spin\, orbital and cha
 rge ordering from LDA+U calculations"
DTSTART;VALUE=DATE-TIME:20040915T150000Z
DTEND;VALUE=DATE-TIME:20040915T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04324@ictp.it
DESCRIPTION:Materials with strong  Coulomb correlations between d-electron
 s show many interesting effects due to the spin\, charge and orbital degre
 es of freedom\, for example different kinds of orderings.  LDA+U method wi
 th its orbital dependent potential can be used for investigation of such e
 ffects where standard LSDA based approaches fail to reproduce experimental
  results.   We demonstrate this on the following applications:  \nCharge o
 rder: magnetit Fe3O4.\nSpin order: calculation of exchange interaction par
 ameters for vanadates CaV2O5\, CaV3O7\, CaV4O9.\nOrbital order: KCuF3\,LaM
 nO3\nCharge and orbital order: Pr0.5Ca0.5MnO3.\nLow-spin to high-spin tran
 sition: three-valent Co in LaCoO3.\n\n//indico.ictp.it/event/a04324/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a04324/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed matter seminar on disorder and strong electron correlati
 ons \n"Quantum magneto-oscillations in a 2D Fermi liquid"
DTSTART;VALUE=DATE-TIME:20041014T100000Z
DTEND;VALUE=DATE-TIME:20041014T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04342@ictp.it
DESCRIPTION:Quantum magneto-oscillations is an important\, and sometimes t
 he only available\, tool for quantifying Fermi-liquid systems.  The activi
 ty in this field has increased recently because of the yet unsolved issue 
 of the metal-insulator transition in 2D.  In this talk\, I will review the
  Luttinger-Ward theory for oscillations in thermodynamic quantities (de Ha
 as-van Alphen effect) and show that the canonical results have to be appli
 ed to 2D systems with a great deal of care.  Also\, I will discuss how and
  whether the oscillations are damped by scattering of quasi-particles.  It
  turns out that only elastic scattering\, e.g.\, by impurities\, damps the
  oscillations\, whereas inelastic scattering\, e.g.\, at other electrons o
 r phonons\, does not affect the oscillations apart from renormalizing the 
 effective mass. Interference between impurity and electron-electron scatte
 ring leads to a temperature-dependent effective mass.  Finally\, I will di
 scuss the "effective mass paradox'' observed in Si MOSFETs: the effective 
 mass is found to depend on the electron density (which is consistent with 
 the Fermi-liquid renormalization) but not on the spin polarization (which 
 is not).\n\n//indico.ictp.it/event/a04342/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04342/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum magneto-oscillations in a 2D Fermi liquid - Part II
DTSTART;VALUE=DATE-TIME:20041021T100000Z
DTEND;VALUE=DATE-TIME:20041021T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04356@ictp.it
DESCRIPTION:Quantum magneto-oscillations is an important\, and sometimes t
 he only available tool for quantifying Fermi-liquid systems.  The activity
  in this field has increased recently because of the yet unsolved issue of
  the metal-insulator transition in 2D.  Continuing from the first seminar 
 on this subject\, I will discuss the "effective mass paradox''  in Si MOSF
 ET heterostructures\, where the effective mass is found to depend on the e
 lectron density (which is consistent with the Fermi-liquid renormalization
 ) but not on the spin polarization (which\, at least at first sight\, is n
 ot).  Time permitting\, I will also show that the interference between ele
 ctron-electron and electron-impurity scattering  (Altshuler-Aronov effect)
  leads to logarithmic temperature dependence of the effective mass\, akin 
 to that in a marginal Fermi liquid.\n\n//indico.ictp.it/event/a04356/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04356/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar on: Disorder and strong electron correlat
 ions\n"Electron transport in low-dimensional Coulomb glasses"
DTSTART;VALUE=DATE-TIME:20041111T100000Z
DTEND;VALUE=DATE-TIME:20041111T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04371@ictp.it
DESCRIPTION:This talk will focus on a theory of electron transport in Coul
 omb glasses and in particular\, disordered quasi-one dimensional systems. 
  The latter correspond to incommensurate charge-density waves exhibiting a
  strongly correlated state of the Wigner crystal type.  I will consider th
 e low-temperature dc transport\, mainly in the ohmic regime\, at fields mu
 ch below the threshold field for sliding of the electronic crystal.  This 
 transport will be shown to be of the variable-range hopping type with rich
  interplays between disorder and interactions.  This theory will be relate
 d to experimental results on organic charge-density waves.  The case of th
 e Wigner glass will also be considered briefly\, in the context of the exp
 eriments of Kravchenko.\n\n//indico.ictp.it/event/a04371/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04371/
END:VEVENT
BEGIN:VEVENT
SUMMARY:\nCondensed Matter SEMINAR on Disorder and strong electron correla
 tions:\n"Singular corrections to the Fermi-liquid behaviour: From a Fermi-
  to Luttinger liquid"
DTSTART;VALUE=DATE-TIME:20041118T100000Z
DTEND;VALUE=DATE-TIME:20041118T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04376@ictp.it
DESCRIPTION:The Fermi-liquid theory states that the low-energy properties 
 of an interacting fermion system are similar to that of the Fermi gas.  Ho
 wever\, in contrast to the Fermi gas\, where all thermodynamic quantities 
 are analytic functions of the temperature\, the next-to-leading correction
 s to the Fermi-liquid forms are non-analytic.\nIn this talk\, I will show 
 that these non-analyticities are the telling sign of small-angle scatterin
 g events\, which are rare in higher dimensions but becomes increasingly mo
 re probable as the dimensionality is reduced.  A breakdown of the Fermi li
 quid in D=1 then follows naturally as the result of a progressive increase
  in \\"corrections'' until they become the dominant terms.  Special attent
 ion will be paid to a non-analyticity in the spin susceptibility which cas
 ts serious doubts on the Hertz-type scenario of a ferromagnetic quantum ph
 ase transition.\nFinally\, I will argue that the perturbation theory is il
 l-defined in two dimensions even for the most benign interaction: the self
 -energy exhibits singularity at each order.  However\, a re-summed theory 
 is well-behaved and the Fermi liquid survies\, albeit with some notable mo
 difications such as a non-Lorentzian shape of the spectral function.\n\n//
 indico.ictp.it/event/a04376/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04376/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos  INFORMAL SEMINAR on Chemical Physics: " Lan
 czos algorithms applied to\nTDDFT-based linear response "\n\n
DTSTART;VALUE=DATE-TIME:20041123T123000Z
DTEND;VALUE=DATE-TIME:20041123T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04379@ictp.it
DESCRIPTION:Linear response based on time-dependent density functional the
 ory is a useful tool for making first-principles calculations on small sys
 tems\, in particular optical properties.  Recently my collaborators and I 
 have been working towards improving the efficiency of making such calculat
 ions.  We have been applying Lanczos techniques to the eigenvalue equation
  that emerges from the linear response formalism.  Firstly\, I provide som
 e background on TDDFT and linear response built upon it\, leading to the c
 entral eigenvalue equation that must be solved.  This will be followed by 
 discussion of the Lanczos methods we have used\, and their advantages over
  conventional techniques for application to this eigenvalue problem.  I wi
 ll describe problems we encountered during applications of our method to t
 est systems\, and some ways of avoiding such problems\, before finally pre
 senting preliminary results in the case that so far shows the most promise
 .\n\n//indico.ictp.it/event/a04379/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04379/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA  CONDENSED MATTER SEMINAR:\n" About effective fie
 ld theories "
DTSTART;VALUE=DATE-TIME:20041124T150000Z
DTEND;VALUE=DATE-TIME:20041124T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04381@ictp.it
DESCRIPTION:A new extension of the standard coarse graining procedure in s
 tatistical physics leads to a new point of view on the (effective) field t
 heories.  These theories take a more precise and consistent form.  The pro
 posed approach can be used for a systematic treatment of fluctuation (corr
 elation) effects of various length scales.  We outline and justify our met
 hod by some preliminary calculations.  Concrete results are given for the 
 critical temperature the Landau parameters of the  *4- theory – the fiel
 d counterpart of the Ising model.  Important unresolved problems of the mo
 dern theory of phase transitions – the problem for the calculation of th
 e true critical temperature\, and the problem for the ground state propert
 ies are considered within the framework of the present approach.  Consider
 able progress of the theory is reported.\n\n//indico.ictp.it/event/a04381/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a04381/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and Strong Electron Correlations:\n"Quantum-to
 -classical crossover in mesoscopic systems"
DTSTART;VALUE=DATE-TIME:20041125T100000Z
DTEND;VALUE=DATE-TIME:20041125T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04384@ictp.it
DESCRIPTION:The reduction of quantum scattering leads to the suppression o
 f shot noise [1]\, and to the breakdown of the universality in quantum tra
 nsport  [2]. I will discuss three different scenarios of the crossover fro
 m quantum to classical transport regime in mesoscopic billiards.  The resu
 lts of the numerical simulation [2] indicate that the crossover in chaotic
  billiards is determined by the separation of the quantum phase space into
  a stochastic and a deterministic phase.  Interestingly\, in disordered bi
 lliards such a separation does not always take place [3].  I will present 
 the theory of crossover which is based on the recently introduced stochast
 ic path integral formalism [4].\n\n[1] S. Oberholzer\, E.S.\, and C. Schon
 enberger\, Nature 415\, 765 (2002).\n[2]Ph. Jacquod\, and E.S.\, Phys. Rev
 . Lett. 92\, 116801 (2004).\n[3] E.S.\, and O. Bulashenko\, cond-mat/04080
 75.\n[4] A. Jordan\, E.S.\, and S. Pilgram\, J. Math. Phys. 45\, 4386 (200
 4).\n\n//indico.ictp.it/event/a04384/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04384/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seminar on Chemical Physics:\n"Wher
 e are electrons in sky?"
DTSTART;VALUE=DATE-TIME:20041201T123000Z
DTEND;VALUE=DATE-TIME:20041201T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04390@ictp.it
DESCRIPTION:The chemical reactions which take place at the surface of the 
 ice particles which compose polar stratospheric clouds\, are very importan
 t in atmospheric science.  They cause\, for example\, the ozone depletion 
 problem [1].  These reactions are known to be enhanced by the presence of 
 electrons generated by cosmic rays.  We are studying with ab-initio Molecu
 lar Dynamics using the FPMD code\, the implication(s) of an electron in ex
 cess on the ice surface at stratospheric temperature (T~150K).  In order t
 o describe correctly the charge density of the excess electron\, we found 
 that it is necessary to introduce a self-interaction correction (SIC).  We
  implemented the SIC proposed by Mauri & coworkers [2]\, which was tested 
 in the case of a single H2O- ion.  Excess electrons are known to stay at t
 he surface of small water clusters\, while they become completely solvated
  (internal states) in larger clusters and in bulk liquid water [3].  At th
 e (0001) surface of ice Ih\, we have found that the excess electron prefer
 entially stays at the surface\, at least up to a few ps of simulation. The
  excess e-\, however\, influences drastically the structure of the first b
 ilayer\, in order to increase the number of dangling -OH  bonds pointing o
 utside the surface.  We compare these results with the dynamics of the neu
 tral (0001)-surface\, at the same temperature conditions.\n[1] Q.-B. Lu an
 d L. Sanche\, Phys. Rev. Lett. 87 (2001) 078501\; Q.-B. Lu and T. Madey Su
 rf. Sci. 451 (2000) 238\; Q.-B. Lu and L. Sanche\, J. Chem Phys. 120 (2004
 ) 2434.\n[2] M. d'Avezac\, M. Calandra and F. Mauri\, submitted to PRL\n[3
 ] K.D. Jordan Science 306 (2004) 618\; D. Hern-Paik et al. ScienceExpress 
 (Sept. 2004) 1102827\; A.E. Bragg ScienceExpress (Sept. 2004) 1103527\; N.
 I. Hammer et al. ScienceExpress (Sept. 2004) 1102792\n\n//indico.ictp.it/e
 vent/a04390/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04390/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder  and Strong Electron Correlations:\n'Non equil
 ibrium Fermi gas as a Riemann-Hilbert problem'
DTSTART;VALUE=DATE-TIME:20041202T100000Z
DTEND;VALUE=DATE-TIME:20041202T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04391@ictp.it
DESCRIPTION:We describe the Riemann-Hilbert (RH) approach to computing the
  long-time response of a Fermi gas to a time-dependent perturbation.  The 
 approach maps the problem onto a non-commuting RH problem.  The method is 
 non-perturbative\, quite general and can be used to compute the Fermi gas 
 response in driven (out of equilibrium) systems.\n\n//indico.ictp.it/event
 /a04391/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04391/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar:\n"Collective dynamics in disordered systems studi
 ed by inelastic UV scattering"
DTSTART;VALUE=DATE-TIME:20041207T100000Z
DTEND;VALUE=DATE-TIME:20041207T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04392@ictp.it
DESCRIPTION://indico.ictp.it/event/a04392/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a04392/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Band insul
 ator - Mott insulator phase transition in one dimensional Hubbard chains"
DTSTART;VALUE=DATE-TIME:20041209T100000Z
DTEND;VALUE=DATE-TIME:20041209T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04396@ictp.it
DESCRIPTION:In a dimerized Hubbard chain\, we study the formation of the e
 xciton band due to the Hubbard interaction by particle-hole scattering.  T
 he resonant level induced by Hubbard interaction is of the order of the in
 teraction and exciton band appears.  The band insulator - Mott insulator p
 hase transition is discussed in the picture of the ground state\, band gap
 \, and exciton gap.  With the same physics picture\, we discuss the phase 
 transition in a Hubbard chain with a staggered on site potential.  The pha
 se diagram was obtained in Phys. Rev. Lett. 83\, 2014(1999) by M. Fabrizio
 \, A.O. Gogolin\, and A.A. Nersesyan. \nBy density matrix renormalization 
 group method\, we obtained also numerical results that verified Fabrizio's
  phase diagram.  At present\, some details on the closing of band gap is s
 till in scrutinizing.\n\n//indico.ictp.it/event/a04396/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04396/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seminar on Chemical Physics:\n"Ab i
 nitio molecular dynamics simulations of liquid water using a hybrid Gaussi
 an and plane waves approach"
DTSTART;VALUE=DATE-TIME:20041214T123000Z
DTEND;VALUE=DATE-TIME:20041214T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a04400@ictp.it
DESCRIPTION:I will present results for the electronic structure\, pair cor
 relation functions\, and dynamical properties of liquid water as obtained 
 with the\ndensity functional simulation package CP2K/Quickstep [http://cp2
 k.berlios.de].\n\nQuickstep employs a mixed Gaussian and plane wave (GPW) 
 scheme to compute efficiently and accurately the electronic structure of l
 arge systems. The linear scaling aspect of the code will be illustrated wi
 th results for the electronic structure of water samples of up to 1000 mol
 ecules and the\nnature of the occupied and unoccupied bands will be discus
 sed. The observed localisation of the orbitals in the band edges will be r
 elated to\nAnderson localisation.\n\nA systematic molecular dynamics study
 \, employing a total of over 600ps of simulation time\, characterises the 
 influence of simulation temperature on\nthe structure and dynamics of liqu
 id water\, and indicates that the various density functionals might yield 
 qualitatively different predictions for\nthe properties of the neat liquid
 .\n\n//indico.ictp.it/event/a04400/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a04400/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations:\n"W
 ave function statistics and multifractality in disordered systems"\n
DTSTART;VALUE=DATE-TIME:20050127T100000Z
DTEND;VALUE=DATE-TIME:20050127T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a058@ictp.it
DESCRIPTION:The talk reviews recent results on statistics of wave function
 s in disordered systems.  The main emphasis is put on multifractality of c
 ritical wave functions at localization transitions.  The analytical and nu
 merical studies of multifractality for various types of critical points ar
 e presented: Anderson transition for different spatial dimensionalities\, 
 power-law random banded matrix model\, Quantum Hall transitions in normal 
 and superconducting systems.\n\n//indico.ictp.it/event/a058/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a058/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations: "BE
 C ten years later:  Breaking up the condensate"\n
DTSTART;VALUE=DATE-TIME:20050203T100000Z
DTEND;VALUE=DATE-TIME:20050203T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0515@ictp.it
DESCRIPTION:Abstract\n\nThis year we celebrate the tenth anniversary of th
 e achievement of Bose-Einstein condensation (BEC) in cold alkali atomic ga
 ses. Interestingly\, current efforts in this field are directed towards th
 e experimental realization of strongly correlated systems with no condensa
 te. In this seminar\, after a brief introduction\, we shall describe two e
 xamples of this ongoing effort to "break up the condensate". The first exa
 mple deals with optical lattices and their use to produce low-dimensional 
 quantum gases. In particular\, we will focus on some aspects of the recent
  theoretical and experimental activity seeking to produce one-dimensional 
 strongly correlated quantum gases with bosonic atoms. In the second part o
 f the seminar\, we will describe some interesting quantum phenomena that o
 ccurs in the limit where a Bose gas is rotated at increasingly rapid frequ
 encies.\n\n//indico.ictp.it/event/a0515/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0515/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seminar on Chemical Physics - Elect
 ronic structure and reactivity of complex bio-inorganic systems: Insights 
 from ab initio molecular dynamics simulations \n
DTSTART;VALUE=DATE-TIME:20050208T090000Z
DTEND;VALUE=DATE-TIME:20050208T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0519@ictp.it
DESCRIPTION:Tracing the reaction pathways of complex organometallic and bi
 o-inorganic systems is a challenging field in theoretical and computationa
 l chemistry\; indeed\, the variety of metal-substrate interactions coupled
  to the large dimensions of the investigated systems often result in extre
 mely complex potential energy surfaces\, characterized by a large number o
 f local minima and transition states connecting the reagents and products 
 basins. The power of Density Functional Theory (DFT) calculations combined
  to DFT-based molecular dynamics simulations\, by means of the Car-Parrine
 llo method [1]\, is illustrated considering examples of applications in th
 e field of bio-inorganic catalysis ranging from the electronic structure a
 nd reactivity of bio-mimicking oxidants to models of the photosynthetic sy
 stem II. Also\, the role of protein environment on CO-O2 selectivity [2] i
 n myoglobin and its implications in CO/O2 myoglobin photochemistry [3] are
  analysed considering TD-DFT excited states calculations and simulations i
 ncluding extended portions of the protein pocket at a full quantum-chemica
 l level.[4] \n\nReferences:\n[1] Car\, R.\; Parrinello\, M. Phys. Rev. Let
 t.\, 1985\, 55\, 2471.\n[2] De Angelis\, F.\; Jarzecki\, A.J.\; Car\, R.\;
  Spiro\, T.G.\, J. Phys. Chem. B\, 2005\, in press. \n[3] De Angelis\, F.\
 ; Car\, R.\; Spiro\, T.G.\, J. Am. Chem. Soc.\, 2003\, 125\, 15710. \n[4] 
 Giannozzi\, P.\; De Angelis\, F.\; Car\, R. J. Phys. Chem.\, 2004\, 339\, 
 204.\n\n//indico.ictp.it/event/a0519/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0519/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA  Condensed Matter Seminar - Small Solids in Confi
 ned Spaces: Classical Physics at Nanoscales
DTSTART;VALUE=DATE-TIME:20050209T150000Z
DTEND;VALUE=DATE-TIME:20050209T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0518@ictp.it
DESCRIPTION:Solids with one or more dimensions comparable to a few atomic 
 spacings\, when trapped in external potentials often show properties very 
 different from those in the bulk. In this talk we consider classical prope
 rties of such systems viz. mechanical and thermodynamic behaviour. Using c
 omputer simulations and simple theoretical considerations\, we show how na
 no- sized strips of a two- dimensional\, crystalline solid phase of densit
 y $eta_s$ may be trapped within an external potential well of strength $mu
 $ and size $L_s$. As $mu$ or $L_s$ is varied\, $eta_s$ exhibits steps corr
 esponding to the addition (or substraction) of an entire atomic layer. We 
 show that this leads to a sharp resonance in the absorption of sound (mome
 ntum impulses) by such an arrangement --- a fact which may have some pract
 ical applications.\n\n//indico.ictp.it/event/a0518/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0518/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations - "O
 n the connection between the problem of an electron tunneling in the prese
 nce of phonons and a time periodic potential"\n\n
DTSTART;VALUE=DATE-TIME:20050210T100000Z
DTEND;VALUE=DATE-TIME:20050210T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0520@ictp.it
DESCRIPTION:Nano-devices are electronic components of mesoscopic scale\, w
 hose small dimensions allow the study of fundamental issues concerning the
  quantum coherence of the electrons and the nature of their interactions. 
 The focus of this talk will be on the connection between two problems that
  are of interest within this realm and that at first sight might seem quit
 e different: an electron that tunnels through a region where it can intera
 ct with a phonon mode (problem (a)) and the one where the scattering regio
 n is subject to a time-periodic Hamiltonian (problem (b)). In the first pa
 rt of this talk I will briefly present a quantum coherent framework for th
 e solution of problem (a). The method is variational (non perturbative) in
  the electron-phonon coupling strength and has been used to solve a variet
 y of transport problems in semiconductor and molecular devices. In the sec
 ond part of the talk\, I will show how problem (b) can be solved in a simi
 lar way through the use of Floquet theory.\n\n//indico.ictp.it/event/a0520
 /
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0520/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations - "Q
 uasi - 1D systems: from 'model' solid state materials to quantum engineeri
 ng with cold fermionc atoms"\n
DTSTART;VALUE=DATE-TIME:20050211T100000Z
DTEND;VALUE=DATE-TIME:20050211T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0521@ictp.it
DESCRIPTION:The search for Luttinger liquid behavior has spanned the last 
 decades of the past century and still continues today. In this seminar\, w
 e will begin by briefly describing the experimental situation (including s
 ome recent STS data) of the Lithium purple bronze\, believed by many to be
  a 'model' system for Luttinger liquid behavior. Later\, we will disucuss 
 how cold atoms could be used to deepen our undestanding of the physics of 
 quasi-1D systems by "engineering" an interacting Fermi system in a two-dim
 ensional optical lattice.\n\n//indico.ictp.it/event/a0521/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0521/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar - "Some rigorous results
  on the strongly correlated electron systems by the spin-reflection-positi
 vity method"\n
DTSTART;VALUE=DATE-TIME:20050223T150000Z
DTEND;VALUE=DATE-TIME:20050223T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0525@ictp.it
DESCRIPTION:In this talk\, we shall briefly review some results on the str
 ongly correlated electron systems\, derived recently by applying Lieb's sp
 in-reflection-positivity method. To explain the basic ideas of this method
  to a wide audience\, we emphasize the important role played by Marshall's
  rule in studying the many-body systems.\nTo begin with\, we consider an o
 ne-dimensional quantum mechanical system in details. By applying the varia
 tional principle and exploiting the connectivity of region ?\, in which th
 e particle moves\, we show that the ground state wave function of this sys
 tem is strictly positive in ? and hence\, satisfies Marshall's sign rule. 
 Then\, we prove that the similar conclusion can also be established for th
 e antiferromagnetic Heisenberg model after some proper unitary transformat
 ion.\nUnfortunately\, for an itinerant electron model\, such as the Hubbar
 d model\, this simple sign rule breaks down. However\, by applying Lieb's 
 spin-reflection positivity method\, one can show that\, when the system is
  half-filled\, the expansion coefficients of its ground state wave functio
 n can be organized into a positive definite matrix after a proper transfor
 mation. Therefore\, the ground state wave function of the half-filled Hubb
 ard model also satisfies Marshall's rule in a more subtle way.\nFinally\, 
 we show that this sign rule leads to several interesting results\, such as
  the ferromagnetic long-range order in the half-filled Hubbard model on a 
 certain type of lattices and some general relations satisfied by the charg
 ed and the spin-excitation gaps.\n\n//indico.ictp.it/event/a0525/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0525/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on  Disorder and Strong Electron Correlations - "
 Correlation effects in single wall carbon nanotubes"\n
DTSTART;VALUE=DATE-TIME:20050224T100000Z
DTEND;VALUE=DATE-TIME:20050224T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0528@ictp.it
DESCRIPTION:Single wall carbon nanotubes have become an important part of 
 physics since their fabrication in 1991. Aside from their many application
 s in nanotechnology\, they are a theorists dream representing an experimen
 tal realization of a one dimensional electron gas. We give a general intro
 duction into the theory of low-energy correlation effects in such nanotube
 s\, concentrating in particular on the case of the so called 'zig-zag' nan
 otube where there are three important features to consider in the undoped 
 case: the long range Coulomb interaction\, the Umklapp scattering and an e
 xplicit geometric dimerization in the interactions generating single parti
 cle band gaps. The ratio of the dimerization induced gap and the Mott gap 
 induced by the Umklapp interactions is dependent on the radius of the nano
 tube and can drive the system through a quantum phase transition.\n\n//ind
 ico.ictp.it/event/a0528/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0528/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations: "El
 ectronic transport in an array of quasi-particles in a non-abelian quantum
  Hall state"\n
DTSTART;VALUE=DATE-TIME:20050301T100000Z
DTEND;VALUE=DATE-TIME:20050301T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0530@ictp.it
DESCRIPTION:A quantized Hall effect that is observed at a Landau filling o
 f nu=5/2 is believed to be well explained by the Moore-Read Pfaffian state
 \, whose excitations obey non-abelian statistics. In this work\, carried o
 ut with Eytan Grosfeld\, we study electronic transport at a Landau filling
  that slightly deviates from nu=5/2\, with the goal of proposing experimen
 tally accessible signatures of the non-abelian nature of the excitations.\
 n\n//indico.ictp.it/event/a0530/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0530/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar - " Unusual phenomena in
  first-order phase transitions: precursors and avalanches"
DTSTART;VALUE=DATE-TIME:20050302T150000Z
DTEND;VALUE=DATE-TIME:20050302T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0529@ictp.it
DESCRIPTION:According to standard textbooks on thermodynamics\, first-orde
 r phase transitions occur abruptly at given values of external control par
 ameters such as temperature\, pressure\, stress\, or applied field (magnet
 ic or electric). In ferroic materials\, however\, these transitions rarely
  show such an ideal behaviour. Commonly\, the expected sharp change of the
  order parameter is smoothed out and thus the transition spreads over a ce
 rtain range of the external control parameter. Even more\, in most cases t
 hey proceed through avalanches. On the other hand\, in a number of systems
  the transition is preceded by anomalies\, typically detected in the respo
 nse to certain excitations\, which originate from the tendency of the syst
 em to perform anticipatory visits to the low symmetry phase.\nIn my talk I
  will establish that disorder is an essential ingredient for these phenome
 na to occur. In particular\, I will discuss the general requirements for p
 retransitional effects such as tweed to occur. Furthermore\, the effect of
  disorder on the transition kinetics will also be considered. Specifically
 \, the athermal character of the transition will be emphasized and the mai
 n characteristics of the complex free energy landscape due to the presence
  of disorder will be analysed. Finally\, the dependence of hysteresis as w
 ell as avalanche behaviour on the driving rate (of an external field) will
  be considered. The results presented will be illustrated with examples fo
 r systems undergoing magnetic and structural transitions.\n\n//indico.ictp
 .it/event/a0529/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0529/
END:VEVENT
BEGIN:VEVENT
SUMMARY:INFORMAL SEMINAR on Disorder and strong electron correlations - "F
 ractional charge in fermionic ladders "
DTSTART;VALUE=DATE-TIME:20050308T100000Z
DTEND;VALUE=DATE-TIME:20050308T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0532@ictp.it
DESCRIPTION:The system of interacting spinless fermions hopping on a two-l
 eg ladder in the presence of an external magnetic field is shown to posses
 s a long range order: the bond density wave or the staggered flux phase. T
 he latter is only possible in the presence of the field\, even though the 
 field is uniform. In both cases the elementary excitations are Z2 kinks an
 d carry one half the charge of an electron.\n\n//indico.ictp.it/event/a053
 2/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0532/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and Strong Electron Correlations - "C
 onductance of a quantum wire in the Wigner crystal regime"
DTSTART;VALUE=DATE-TIME:20050310T100000Z
DTEND;VALUE=DATE-TIME:20050310T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0533@ictp.it
DESCRIPTION:We study the effect of Coulomb interactions on the conductance
  of a single-mode quantum wire connecting two bulk leads. When the density
  of electrons in the wire is very low\, they arrange in a finite-length Wi
 gner crystal. In this regime the electron spins form an antiferromagnetic 
 Heisenberg chain with exponentially small coupling J. An electric current 
 in the wire perturbs the spin chain and gives rise to a temperature-depend
 ent contribution of the spin subsystem to the resistance. At low temperatu
 re T > J the spin effect reduces the conductance to e^2/h.\n\n//indico.ict
 p.it/event/a0533/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0533/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and Strong Electron Correlations - "E
 lectron interactions and transport between coupled quantum Hall edges"\n
DTSTART;VALUE=DATE-TIME:20050317T100000Z
DTEND;VALUE=DATE-TIME:20050317T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0534@ictp.it
DESCRIPTION:We examine the effects of electron-electron interactions on tr
 ansport between edge states in a multilayer integer quantum Hall system. T
 he edge states of such a system\, coupled by interlayer tunneling\, form a
  two-dimensional\, chiral metal at the sample surface. We calculate the te
 mperature-dependent conductivity and the amplitude of conductance fluctuat
 ions in this chiral metal\, treating Coulomb interactions and disorder exa
 ctly in the weak-tunneling limit. We find that conductivity increases with
  increasing temperature\, as observed in recent experiments\, and we show 
 that the correlation length characterising conductance fluctuations varies
  inversely with temperature.\n\n//indico.ictp.it/event/a0534/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0534/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations - "I
 nteracting electrons in artificial nanostructures"
DTSTART;VALUE=DATE-TIME:20050331T100000Z
DTEND;VALUE=DATE-TIME:20050331T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0537@ictp.it
DESCRIPTION:Carbon nanotubes and\, more recently\, semiconducting nanowire
 s are attracting considerable interest as building blocks for a wide varie
 ty of nanodevices. Many relevant proofs of concept have already been provi
 ded such as field effect transistors\, elementary logic circuits\, light e
 mitting diodes\, lasers\, and biochemical sensors. At the same time\, the 
 increasing quality of these nanostructures is opening new possibilities fo
 r low-temperature applications and for the study of fundamental quantum ph
 enomena.\n\nIn this talk I will present the results of mesoscopic transpor
 t experiments with individual III-V nanowires and single-walled carbon nan
 otubes. In particular I will report on 1) the observation of a tunable Jos
 ephson supercurrent in InAs nanowires contacted by superconducting electro
 des\, and 2) the observation of orbital Kondo physics in carbon nanotube q
 uantum dots.\n\n//indico.ictp.it/event/a0537/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0537/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos INFORMAL SEMINAR on Chemical Physics - " Com
 puter simulation of nanostructures out of equilibrium:\n From photochemist
 ry to molecular electronics "
DTSTART;VALUE=DATE-TIME:20050405T100000Z
DTEND;VALUE=DATE-TIME:20050405T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0538@ictp.it
DESCRIPTION://indico.ictp.it/event/a0538/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0538/
END:VEVENT
BEGIN:VEVENT
SUMMARY:INFORMAL SEMINAR on Disorder and Strong Electron Correlations - "C
 oulomb drag in high Landau level"\n
DTSTART;VALUE=DATE-TIME:20050407T100000Z
DTEND;VALUE=DATE-TIME:20050407T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0539@ictp.it
DESCRIPTION:Recent experiments on Coulomb drag in the quantum Hall regime 
 have yielded a number of surprises. The most striking observations are tha
 t the Coulomb drag can become negative in high Landau levels and that its 
 temperature dependence is non-monotonous. We develop a systematic diagramm
 atic theory of Coulomb drag in strong magnetic fields explaining these puz
 zling experiments. The theory is applicable both in the diffusive and the 
 ballistic regimes\; we focus on the experimentally relevant ballistic regi
 me (interlayer distance $a$ smaller than the cyclotron radius $R_c$). It i
 s shown that the drag at strong magnetic fields is an interplay of two con
 tributions arising from different sources of particle-hole asymmetry\, nam
 ely the curvature of the zero-field electron dispersion and the particle-h
 ole asymmetry associated with Landau quantization. The former contribution
  is positive and governs the high-temperature increase in the drag resisti
 vity. On the other hand\, the latter one\, which is dominant at low $T$\, 
 has an oscillatory sign (depending on the difference in filling factors of
  the two layers) and gives rise to a sharp peak in the temperature depende
 nce at $T$ of the order of the Landau level width.\n\n//indico.ictp.it/eve
 nt/a0539/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0539/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos INFORMAL SEMINAR on Chemical Physics -  "Con
 ductance of a quantum junction: a new formulation suitable for TDDFT and M
 BPT ab-initio calculations"
DTSTART;VALUE=DATE-TIME:20050412T100000Z
DTEND;VALUE=DATE-TIME:20050412T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0542@ictp.it
DESCRIPTION://indico.ictp.it/event/a0542/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0542/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and Strong Electron Correlations - "L
 ow-temperature decoherence of qubit coupled to background charges"\n
DTSTART;VALUE=DATE-TIME:20050421T100000Z
DTEND;VALUE=DATE-TIME:20050421T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05101@ictp.it
DESCRIPTION:We have found an exact expression for the decoherence rate of 
 a qubit coupled to fluctuating background charges. At low temperatures T t
 he decoherence rate is linear in T while at high temperatures our expressi
 on coincides with a known classical solution which is\, however\, reached 
 in the strong coupling regime at surprisingly high T. A comparison of expe
 rimental data with our predictions would give an unambiguous indication of
  whether the experimentally observed decoherence of a Josephson-junction q
 ubit is due to background charges.\n\n//indico.ictp.it/event/a05101/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05101/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations - "D
 ephasing and localization in disordered Luttinger liquids"\n\n
DTSTART;VALUE=DATE-TIME:20050428T100000Z
DTEND;VALUE=DATE-TIME:20050428T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05125@ictp.it
DESCRIPTION:I will review recent advances in our understanding of transpor
 t in mesoscopic strongly correlated electron systems in one dimension. Pro
 minent examples of these systems are semiconductor quantum wires\, carbon 
 nanotubes\, and coupled quantum Hall edges running in opposite directions.
  I will focus on the interplay between the effects of disorder and interac
 tions\; specifically\, on the effects of Anderson localization in a disord
 ered Luttinger liquid.\nIn the presence of disorder\, the conductivity at 
 finite temperature is nonzero only because of inelastic electron-electron 
 scattering. I will demonstrate that the notions of weak localization and d
 ephasing due to Coulomb interactions are applicable to the strongly correl
 ated 1D system. The dephasing rate depends strongly on the spin polarizati
 on and for spinless electrons is totally different from the Aharonov-Bohm 
 dephasing rate. With lowering T\, the system exhibits localization transit
 ion in many-body Fock space ("Anderson-Fock glass") and the conductivity v
 anishes at a critical temperature proportional to the strength of disorder
 .\n\n//indico.ictp.it/event/a05125/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05125/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar\n"The multiscaling of ti
 me-dependent structure functions in turbulence"\n
DTSTART;VALUE=DATE-TIME:20050511T150000Z
DTEND;VALUE=DATE-TIME:20050511T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05147@ictp.it
DESCRIPTION:We show that different ways of extracting time scales from tim
 e-dependent velocity structure functions lead to different dynamic-multisc
 aling exponents in fluid turbulence.  These exponents are related to equal
 -time multiscaling exponents by different classes of bridge relations whic
 h we derive. We check this explicitly by detailed numerical simulations of
  the GOY shell model for fluid turbulence.  Next we apply these ideas to t
 he problem of turbulent advection of a passive scalar. Here\, our principa
 l  results\, obtained analytically and  numerically\, illustrate important
   principles that appear\, at first sight\,  to be surprising.  We find\, 
 e.g.\, that the dynamic exponents depend via bridge relations only on the 
  equal-time scaling exponents of the velocity field.  Thus\, even though e
 qual-time structure functions for the passive-scalar and passive-vector pr
 oblems display multiscaling\, they show simple dynamic scaling if the adve
 cting velocity is of the Kraichnan type. Dynamic multiscaling is obtained 
 only if the advecting velocity field is itself intermittent.\n\n//indico.i
 ctp.it/event/a05147/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a05147/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Information Seminar on Chemical Physics:\n"Z
 n-porphyrin/C70 complexes for efficient solar cells: Molecular orientation
 s\, electronic properties and charge transfer time"
DTSTART;VALUE=DATE-TIME:20050511T103000Z
DTEND;VALUE=DATE-TIME:20050511T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05150@ictp.it
DESCRIPTION:Molecular dyes composed of electron donors capable of photo-in
 duced electron transfer to linked acceptors have been used to mimics the n
 atural photosynthetic reaction centers in photochemical devices.  Porphyri
 ns are among the most employed building blocks as electron donors [1]. Int
 riguing is the system formed by metallo-porphyrins directly attached to fu
 llerenes\, actually realized in co-crystallites and solution form only [2]
 \, for which the typical\nfluorescence decay of the excited porphyrins is 
 strongly quenched [3]\,  i.e. non-radiative decay channels are favored. Ne
 xt step toward an efficient solar cell is the deposition of similar metall
 o-porphyrin/fullerene systems on substrates\, with the ability to control 
 and tailor the orientation of both molecules (geometric structure and arra
 ngement of the molecules are responsible for the physical properties of th
 e system).  Here\, we demonstrate that the UHV deposition of porphyrins an
 d C70 molecules on clean substrates allows the formation of films having s
 elected intermolecular interactions and electronic properties. Using polar
 ization-dependent x-ray absorption and photoemission spectroscopy we have 
 investigated the growth\, molecular orientation and electronic properties 
 of Zn-Tetraphenyl-porphyrin (ZnTPP)/C70 films deposited on Ag(110)\, Si(11
 1) and TiO2(110). The quite strong ZnTPP-fullerene interaction allows the 
 growth of a single ZnTPP layer on top of a C7 \nmonolayer (and vice versa)
 \, as well as it allows the self-assembling of the two molecular species i
 n ordered multilayer structures when co-deposited. The interactions with t
 he substrate and with C70 modify the ZnTPP electronic states\, indicating 
 formation of bonds and charge redistribution.  Resonant photoemission\, wh
 ich probes the delocalization (charge transfer) of an excited electron on 
 the time scale of the core-hole lifetime [4]\, indicates that the ZnTPP/C7
 0 mixed systems delocalize more efficiently the excited electrons as compa
 red to pure ZnTPP films. The charge transfer time depends on the empty Ã?
 €* state in which the electron is excited and on the relative molecu
 lar orientations\, but in general is below 10 fs and in some cases faster 
 than 5 fs.\n\n//indico.ictp.it/event/a05150/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05150/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations - "T
 ypical properties of  "glassy" economies"
DTSTART;VALUE=DATE-TIME:20050513T100000Z
DTEND;VALUE=DATE-TIME:20050513T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05156@ictp.it
DESCRIPTION://indico.ictp.it/event/a05156/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05156/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on disorder and strong electron correlations:\n"F
 irst steps of a nucleation theory in disordered systems"
DTSTART;VALUE=DATE-TIME:20050519T100000Z
DTEND;VALUE=DATE-TIME:20050519T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05160@ictp.it
DESCRIPTION:I will describe a field theoretical formalism for studying equ
 ilibrium relaxation in glassy systems.  I will mainly discuss disordered m
 odels with large but finite range of interaction and I will define glassy 
 "effective potentials" which in mean-field are non-convex\, two minima fun
 ction of the overlap.  Metastability will be associated with the existence
  of space inhomogeneous solution of suitable field equations and study the
  simplest of such solutions.\n\n//indico.ictp.it/event/a05160/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05160/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations: "Cr
 oss-correlations among zeros of Dirichlet L-functions and parametric RMT"\
 n
DTSTART;VALUE=DATE-TIME:20050526T100000Z
DTEND;VALUE=DATE-TIME:20050526T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05169@ictp.it
DESCRIPTION:Cross-correlations between critical zeros of different L-funct
 ions exhibit properties analogous to cross-correlations between related ch
 aotic spectra.  This phenomenon can be analysed in the framework of parame
 tric random matrix theory.  I will also discuss other structures in analyt
 ic number theory which exhibit striking similarities to properties of dyna
 mical systems.\n\n//indico.ictp.it/event/a05169/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05169/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Colloquim on Mesoscopic physics: From Brownian motion to quantum d
 evices
DTSTART;VALUE=DATE-TIME:20050530T151500Z
DTEND;VALUE=DATE-TIME:20050530T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05173@ictp.it
DESCRIPTION:One of the revolutionary papers that Einstein wrote in 1905 is
  devoted to the theory of the Brownian motion - motion of particles that a
 re small enough to feel the molecular motion\, and large enough to be obse
 rved individually. Einstein proposed statistical analysis of the motion of
  each Brownian particle and derived Diffusion equation to perform this ana
 lysis. This idea of statistical approach is so crucial for modern mesoscop
 ic physics\, that it would be an fare to start the history of the field fr
 om the celebrated Einstein's paper. Mesoscopic (sample-specific) effects a
 re usually rather weak in classical systems. Quantum interference enhances
  them tremendously. Mesoscopic effects become increasingly important with 
 miniaturization of the devices. As to the nanostructures\, these effects s
 imply dominate. We will briefly discuss the history and current status of 
 the theory of quantum transport and its connection with the general descri
 ption of complex quantum integrable and chaotic systems.\n\n//indico.ictp.
 it/event/a05173/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a05173/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Disorder and strong electron correlations:\n"C
 an a fractional charge tunnel through an insulator?" \n
DTSTART;VALUE=DATE-TIME:20050602T100000Z
DTEND;VALUE=DATE-TIME:20050602T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05181@ictp.it
DESCRIPTION:It is widely believed that the answer to the question in the t
 itle is in the negative.  The exclusion of such a process - tunneling of a
  fractionally charged quasi-particle through a potential barrier (an insul
 ator) goes back to a "global constraint": the number of charge carriers on
  either side of the barrier must be (nearly) an integer.  We address the i
 ssue of a QP tunneling in connection with geometries where this constraint
  does not apply\, point out to the feasibility of such tunneling and evalu
 ate its amplitude.\n\n//indico.ictp.it/event/a05181/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05181/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations - "O
 ne-dimensional gapped phases: An attempt to a classification through duali
 ty symmetries"\n\n
DTSTART;VALUE=DATE-TIME:20050609T100000Z
DTEND;VALUE=DATE-TIME:20050609T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05263@ictp.it
DESCRIPTION:In this talk\, I am going to discuss on a possible attempt to 
 a classification of one-dimensional fully-gapped phases. In particular\, w
 e will reveal the existence of hidden duality symmetries in the low-energy
  limit which relate different ordered phases. The description of the gappe
 d phases of the generalized two-leg spin ladder will be described using th
 is duality approach.\n\n//indico.ictp.it/event/a05263/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05263/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: "Structure control of m
 etal nano wire via electrochemical potential control"
DTSTART;VALUE=DATE-TIME:20050615T150000Z
DTEND;VALUE=DATE-TIME:20050615T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05268@ictp.it
DESCRIPTION:The electrical conductance through an atomic scale metal nano 
 constriction is quantized.  The conductance quantization has attracted wid
 e attention not only for fundamental science but also for technological ap
 plication.  We have studied the conductance of metal nano constriction in 
 solution.\nMetal nano constrictions were prepared by pressing a scanning t
 unneling microscopy (STM) tip into a substrate and then pulling out of con
 tact in an electrochemical cell.  For Au nano constriction\, the Au STM ti
 p and Au(111) substrate is used.  For the preparation of nano constriction
 s using other metals (Ni\, Pd\, Cu\, Ag)\, electrochemical metal depositio
 n was carried out on to both Au substrate and STM Au tip in solution.\nIn 
 case of Au nano contact\, a 1 nm long mono atomic wire is fabricated in so
 lution at room temperature\, and its stability is controlled by electroche
 mical potential.  As well as unit value of G0\, additional fractional valu
 es also appeared in the conductance histogram\, when the electrochemical p
 otential of the system was kept below the hydrogen evolution potential.  T
 he intensity of the fractional conductance peak increased when the system 
 was polarized at the negative potential.  The result implies that adsorbed
  hydrogen contributes to stabilize the certain atomic configuration of mon
 o atomic wire.  It was proved that the electrochemical potential can contr
 ol the stability of the mono atomic wire\, and its structure.\nFor other m
 etals\, we also observed change in the conductance quantization behavior d
 epending on the electrochemical potential.  In case of Pd\, clear conducta
 nce quantization appeared at the negative polarization.  It is the first o
 bservation of the conductance quantization of Pd mono-atomic contact prepa
 red at room temperature.\n\n//indico.ictp.it/event/a05268/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a05268/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations: " L
 ocalized growth modes\, dynamic textures\, and upper critical dimension fo
 r the Kardar-Parisi-Zhang equation in the weak noise limit "\n
DTSTART;VALUE=DATE-TIME:20050616T100000Z
DTEND;VALUE=DATE-TIME:20050616T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05269@ictp.it
DESCRIPTION:A weak noise scheme is applied to the Kardar-Parisi-Zhang equa
 tion for a growing interface in all dimensions. It is shown that the solut
 ions can be interpreted in terms of a growth morphology of a dynamically e
 volving texture of localized growth modes with superimposed diffusive mode
 s. Applying Derrick's theorem it is conjectured that the upper critical di
 mension is four.\n\n//indico.ictp.it/event/a05269/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05269/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seminar on Chemical Physics:\n"Phon
 ons of carbon nanostructures: A local study with inelastic electron tunnel
 ling spectroscopy"\n
DTSTART;VALUE=DATE-TIME:20050621T143000Z
DTEND;VALUE=DATE-TIME:20050621T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05271@ictp.it
DESCRIPTION:The phonon spectrum of highly oriented pyrolitic graphite and 
 of single wall carbon nanotubes was studied with inelastic electron tunnel
 ing spectroscopy using a low temperature scanning tunneling microscope.  T
 he measured inelastic spectrum of graphite is found to be directly proport
 ional to the calculated vibrational density of states.  Based on the elect
 ronic band structure of graphite we suggest that a phonon-assisted tunneli
 ng process influences the amplitude of the observed inelastic spectrum. [1
 ].  Similarly the phonon spectrum of single wall carbon nanotubes adsorbed
  on Au substrates was measured.  On the low energy part of the spectrum th
 e radial breathing mode (RBM) has been identified and its linear dependenc
 e on the inverse of the tube diameter demonstrated.  Furthermore\, based o
 n the high spacial resolution typical of the scanning tunneling technique\
 , the behavior of the radial mode becomes accessible in close proximity to
  topological defects\, like intermolecular junctions\, tube endings [2]\, 
 or crossed junctions of tubes where the tube cage is sensitively deformed.
     \n\n[1] L.Vitali et al\,  Physical Review B.69.121414R (2004)\n[2] L.V
 itali et al\,  Physical Review Letters 93.136103.(2004)\n\n//indico.ictp.i
 t/event/a05271/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05271/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seminar on Chemical Physics:\n"What
  can we learn from the nanoscale mechanical response of biomolecules?"
DTSTART;VALUE=DATE-TIME:20050623T140000Z
DTEND;VALUE=DATE-TIME:20050623T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05273@ictp.it
DESCRIPTION:The applications of scanning probe microscopy (SPM) to surface
  science are\, of course\, countless and have brought a real revolution to
  the field. Less expected but\, a posteriori\, equally logical is the revo
 lution that single molecule experimentation (with both SPM and other probe
 s) is bringing to the study of  macromolecules of both biological and non-
 biological origin. On the other hand\, in this journey towards single mole
 cule studies it is actually at present possible to choose the size of the 
 sample rather freely.  Each size ( 1 or 1\,000 or 1\,000\,000 molecules or
  even the bulk ) has its own advantages and drawbacks both experimentally 
 and theoretically. \n	After having given a couple of examples ( taken from
  the work of others ) of experiments on biomolecules at the single molecul
 e level \, I will show evidence from our own laboratory  that working at t
 he hundreds of molecules level\, presents some unique advantages that make
  this type of experiments well worth pursuing. After having introduced the
  methods that give us the possibility to isolate a sample on the order of 
 100 to 1\,000 molecules in the middle of a reference ( larger ) set of sim
 ilar molecules\, I will apply the time honored method of differential meas
 urements to study the properties of monolayers of molecules of incresing c
 omplexity. \n	Starting with saturated hydrocarbons and short strands of  p
 olyethylene glycol ( a molecule of great importance in the field of biocom
 patibility ) I will move to the study of small patches of DNA and some ver
 y recent results on proteins. The second class of results will be presente
 d as an example of why quite a few people are presently convinced\, that t
 he field of "NanoBio" is not just a fad but may actually be our ticket to 
 understand at least some of the complexities of a living cell.\n\n//indico
 .ictp.it/event/a05273/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a05273/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics:\n"An analytical probabili
 stic approach to the ground state of lattice systems"
DTSTART;VALUE=DATE-TIME:20050629T150000Z
DTEND;VALUE=DATE-TIME:20050629T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05277@ictp.it
DESCRIPTION:We present a new approach to the ground state of a lattice sys
 tem whose evolution is governed by an arbitrary finite Hamiltonian matrix 
 H.   We show that the ground state of H can be analytically determined thr
 ough the probability distribution of the underlying classical dynamics. So
 me possible applications of the present approach will also be discussed.\n
 \n//indico.ictp.it/event/a05277/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a05277/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: "Melting transition in 
 elemental materials from ab-initio molecular dynamics"
DTSTART;VALUE=DATE-TIME:20050713T150000Z
DTEND;VALUE=DATE-TIME:20050713T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05289@ictp.it
DESCRIPTION:It is currently possible to compute reliably the free energy o
 f a material at finite temperature and pressure from the quantum mechanica
 l ground state of the electrons within density functional theory. The free
  energy is obtained by thermodynamic integration in the context of ab-init
 io molecular dynamics. By applying this approach to coexisting liquid and 
 solid phases\, one can predict a melting line from first-principles micros
 copic theory. In this talk I will review the basic computational approach\
 , and will discuss how different approximations for the exchange and corre
 lation functional affect the predicted phase diagram. Finally I will prese
 nt a recent application in which this scheme has been used to determine th
 e diamond melting line in an extended range of temperatures and pressures.
  This coexistence line is poorly known from experiment\, given the extreme
  pressures and temperatures that are required to melt diamond.  The implic
 ations of the newly predicted carbon phase diagram will be discussed.\n\n/
 /indico.ictp.it/event/a05289/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a05289/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seminar on Chemical Physics: "Physi
 cal properties of minerals and oxides at high pressures: Structural and el
 astic effects of chemical substitutions and electronic transitions" 
DTSTART;VALUE=DATE-TIME:20050714T143000Z
DTEND;VALUE=DATE-TIME:20050714T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05290@ictp.it
DESCRIPTION:High-p3 pressure mineral physics investigates the properties o
 f candidate components of the Earth deep interior and allows us to compare
  mineralogical models with both geochemical and geophysical constraints.  
 The experimental techniques of mineral physics allow us to investigate the
  properties of a wide range of Earth materials. \nIn this talk I will pres
 ent selected results of my research regarding  (a) the compositional depen
 dence of elasticity in olivine and minerals of the upper mantle (b) the ef
 fect of the high-spin to low spin transition of Fe on the compressibility 
 of (Mg\,Fe)O ferropericlase at lower mantle pressures\, (c) a possible mec
 hanism for valence change of Fe in hydrous minerals in the subducting lith
 ospheric slabs and upper mantle based on vibrational spectroscopy of Fe(OH
 )2.\n\n//indico.ictp.it/event/a05290/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05290/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "Generalized transition state"
DTSTART;VALUE=DATE-TIME:20050722T100000Z
DTEND;VALUE=DATE-TIME:20050722T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05306@ictp.it
DESCRIPTION:We propose a computational scheme for materials where standard
  Local Density Approximation (LDA) fails to produce a satisfactory descrip
 tion of excitation energies . The method uses Slater's "transition state" 
 approximation and Wannier functions basis set.  We define a correction to 
 LDA functional in such a way that its variation produces one-electron ener
 gies for Wannier functions equal to the energies obtained in "transition s
 tate" constrained LDA calculations.  In the result eigenvalues of the prop
 osed functional could be interpreted as excitation energies of the system 
 under consideration.  The method was applied to MgO\, Si\, NiO and BaBiO$_
 3$ and gave an improved agreement with experimental data of energy gap val
 ues comparing with LDA.\n\n//indico.ictp.it/event/a05306/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05306/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations:\n"S
 pectral statistics of a quantum interval exchange map" \n
DTSTART;VALUE=DATE-TIME:20050804T100000Z
DTEND;VALUE=DATE-TIME:20050804T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05316@ictp.it
DESCRIPTION:Curious spectral properties of an ensemble of random unitary m
 atrices appearing naturally in the quantization of a simple interval-excha
 nge map are investigated.  It is demonstrated that\, under certain conditi
 ons on map parameters\, local spectral statistics of this ensemble tends t
 o the semi-Poisson distribution with arbitrary integer or half-integer lev
 el repulsion at small distances depending on time-reversal symmetry of the
  map.\n\n//indico.ictp.it/event/a05316/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05316/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: 'Two applications of stat
 istical physics to machine-learning and information theory'
DTSTART;VALUE=DATE-TIME:20050915T100000Z
DTEND;VALUE=DATE-TIME:20050915T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05335@ictp.it
DESCRIPTION:I will present two short works in which methods from statistic
 al mechanics are applied in a machine learning problem of semi-supervised 
 learning\, and an engineering application of two-dimensional channels.\n\n
 //indico.ictp.it/event/a05335/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05335/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on: Disorder and strong electron correlations\n"S
 olvable model of a random spin-1/2 XY chain"
DTSTART;VALUE=DATE-TIME:20050929T100000Z
DTEND;VALUE=DATE-TIME:20050929T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05343@ictp.it
DESCRIPTION:In my talk I present exact calculations of thermodynamic quant
 ities for the spin-1/2 isotropic XY chain with random Lorentzian intersite
  interaction and transverse field that depends linearly on the surrounding
  intersite interactions.\n\n//indico.ictp.it/event/a05343/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05343/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations\n"Bo
 sonic stimulation and statistical fluctuations: A strangeness of proportio
 n"
DTSTART;VALUE=DATE-TIME:20051006T100000Z
DTEND;VALUE=DATE-TIME:20051006T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05345@ictp.it
DESCRIPTION:The kinematics of Bose statistics for the scattering of incomi
 ng bosons into a set of non-overlapping\, degenerate single-particle state
 s\, is shown to manifest a non-ergodic and symmetry-breaking behaviour sim
 ilar to the Polya urn problem\, familiar in diverse situations ranging fro
 m population biology to economics. It is a purely statistical consequence 
 of bosonic stimulation\, which favours scattering into a state with an alr
 eady higher occupation number.  Possible realization is briefly discussed.
 \n\n//indico.ictp.it/event/a05345/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05345/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special informal seminar on Disorder and strong electron correlati
 ons:\n"Doped spin liquid: Luttinger sum rule and low temperature order"\n
DTSTART;VALUE=DATE-TIME:20051010T100000Z
DTEND;VALUE=DATE-TIME:20051010T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05348@ictp.it
DESCRIPTION:We analyze a model of two-leg Hubbard ladders weakly coupled b
 y interladder tunneling. At half filling a semimetallic state with small F
 ermi pockets is induced beyond a threshold tunneling strength.  The sign c
 hanges in the single electron Green's function relevant for the Luttinger 
 Sum Rule now take place at surfaces with both zeroes and infinities with i
 mportant consequences for the interpretation of ARPES experiments.  Residu
 al interactions betwen electron and hole-like quasi-particles cause a tran
 sition to long range order at low temperatures.  The theory can be extende
 d to small doping leading to superconducting order.\n\n//indico.ictp.it/ev
 ent/a05348/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05348/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seminar on Chemical Physics: "Segre
 gation-induced alloy nanocluster thermodynamical properties:  FCEM computa
 tions with energetics based on surface/subsurface bond strength variations
 "\n\n
DTSTART;VALUE=DATE-TIME:20051011T100000Z
DTEND;VALUE=DATE-TIME:20051011T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05351@ictp.it
DESCRIPTION:The free-energy concentration expansion method (FCEM) is an ef
 ficient tool for elucidating site-specific compositions in multicomponent 
 medium size alloy nanoclusters\, that are inaccessible by current experime
 ntal techniques (and by some theoretical approaches). FCEM computations\, 
 in conjunction with energetics based on surface/subsurface bond strength v
 ariations obtained by the NRL-TB method\, were accomplished for Rh-Pd-Cu a
 nd the corresponding binary Rh-Cu\, Pd-Cu and Rh-Pd nanocluster systems ca
 pable of inter-cluster atom exchanging.  The cluster sizes range from 55 t
 o 923 atoms with perfect cuboctahedral shape.  The computed segregated str
 uctures exhibit several phenomena such as surface induced order (Pd-Cu) an
 d sequential multi-site segregation (Rh-Pd-Cu). The data form the basis fo
 r evaluating pertinent "cluster thermodynamic functions"\, such as the con
 figurational entropy and heat-capacity.  For all systems Schottky-type hea
 t capacity anomaly is predicted and attributed to intra-cluster atomic exc
 hange (e.g.\, desegregation) excitation processes.  For Rh-Cu\, Rh-Pd and 
 Rh-Pd-Cu the cluster system is expected to separate into "magic-numbe" ord
 ered structures\, with transition temperatures estimated from the disappea
 rance of convexity in the free-energy vs. composition curves.\n\n//indico.
 ictp.it/event/a05351/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05351/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on disorder and strong electron correlations:\n"C
 oulomb interaction and nanoscale electronic inhomogeneities"  \n
DTSTART;VALUE=DATE-TIME:20051013T100000Z
DTEND;VALUE=DATE-TIME:20051013T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05352@ictp.it
DESCRIPTION:In a number of systems\, there seems to be experimental eviden
 ce for electronic inhomogeneities on a length scale of the order of nanome
 tres\; examples are manganites\, cuprates\, cobaltates\, etc..  I describe
  a lattice model with two different microscopic states at each site\, and 
 long range coulomb interactions.  Extensive numerical work reported here s
 hows that the separation into two phases is muted to nanoscale inhomogenei
 ties as a consequence of the coulomb interaction.  The nature and extent o
 f this is discussed as a function of relevant physical parameters\, and ap
 plied to manganites and cobaltates.\n------------------------------\nThe a
 bove work has been done by T. Gupta\, V. Shenoy\, H.R. Krishnamurthy and T
 .V. Ramakrishnan at the Indian Institute of Science\, Bangalore.\n\n//indi
 co.ictp.it/event/a05352/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05352/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar on:" Microscopic mechani
 sms of friction" 
DTSTART;VALUE=DATE-TIME:20051014T100000Z
DTEND;VALUE=DATE-TIME:20051014T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05353@ictp.it
DESCRIPTION:This talk will be devoted to a computer simulation of the micr
 oscopic mechanisms of friction.  First\, I will give a brief overview of t
 he main friction facts and laws.  Then\, I will present a molecular dynami
 cs technique for a film confined between two substrates in moving contact\
 , based on Langevin equations with a coordinate- and velocity-dependent da
 mping coefficient.  The simulation results show that the microscopic mecha
 nism of stick-slip motion depends on the ratio of the strength of interact
 ion within the lubricant and the lubricant-substrate interaction.   For a 
 "hard" lubricant\, when the lubricant film remains in a solid state during
  sliding\, the stick-slip is due to inertia effects\,  while for a "soft" 
 lubricant\, when the lubricant-substrate interaction is much larger than t
 he interaction within the  lubricant\, the stick-slip motion is due to the
  melting-freezing mechanism.  An optimal choice of the interaction within 
 the lubricant leads to a self-ordering of the lubricant film and results i
 n a minimal kinetic friction.   Finally\, I will briefly discuss some open
  problems of friction\, such as the minimal velocity of the transition fro
 m smooth sliding to stick-slip motion\,  the role of the slider geometry\,
  the role of the shape of lubricant molecules\,  and the problem of calcul
 ation of the static and kinetic friction coefficients.\n\n//indico.ictp.it
 /event/a05353/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05353/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seminar on Chemical Physics:\n"Elec
 tromechanical effects in carbon nanotubes"
DTSTART;VALUE=DATE-TIME:20051018T100000Z
DTEND;VALUE=DATE-TIME:20051018T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05349@ictp.it
DESCRIPTION:We perform ab initio calculations of charged graphene and sing
 le-wall carbon nanotubes (CNTs)\, obtaining a wealth of electromechanical 
 behaviours:\n\n(1) Both nanotubes and graphene expand upon electron inject
 ion.\n(2) Upon hole injection\, metallic nanotubes and graphene display a 
 nonmonotonic behaviour.  Upon increasing hole densities\, the lattice cons
 tant initially contracts\, reaches a minimum\, and then starts to expand. 
  The hole densities at minimum lattice constants are 0.3 |e|/atom for grap
 hene and between 0.1 and 0.3|e|/atom for the metallic nanotubes studied.\n
 (3) Semiconducting CNT's with small diameters (d ~ 20 A) display a behavio
 ur intermediate between those of metallic and large-gap CNT's.\n(5) The st
 rain versus extra charge displays a linear plus power-law behaviour\, with
  characteristic exponents for graphene\, metallic\, and semiconducting CNT
 's.\n\nAll these features are physically understood within a simple tight-
 binding total-energy model.\n\n//indico.ictp.it/event/a05349/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05349/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar:\n" Vacancy-impurity nan
 oclusters in solid solutions 3He - 4He" \n
DTSTART;VALUE=DATE-TIME:20051019T150000Z
DTEND;VALUE=DATE-TIME:20051019T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05358@ictp.it
DESCRIPTION:Vacancies and impurities in solid helium are delocalized and c
 an be considered as quasiparticles (defectons) that move through the latti
 ce as free particles with a complicated dispersion law.  Vacancy-impurity 
 clusters in solid solutions of helium isotopes near the phase separation t
 ransition appear due to the quantum nature of vacancies and impurities in 
 quantum crystals and have no classical analogues.  They were predicted by 
 the author as a part of a series effects which can strongly influence the 
 kinetics of the phase transitions at very low temperatures.  Some ground p
 roperties of the clusters are considered and the theoretical estimations a
 re compared with the experimental results. Some other effects of defectons
  on the crystal lattice structure are analysed.\n\n//indico.ictp.it/event/
 a05358/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a05358/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on disorder and strong electron correlations: "Fo
 rm factors study of a one parameter family of integrable massless flows"\n
DTSTART;VALUE=DATE-TIME:20051020T100000Z
DTEND;VALUE=DATE-TIME:20051020T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05359@ictp.it
DESCRIPTION:Massless flows from the coset model su(2)_{k+1}* su(2)_k/su(2)
 _{2k+1} to the minimal model M_{k+2} are studied from the viewpoint of for
 m factors.  These flows include in particular the well-known flow from the
  Tricritical Ising model to the Ising model.  We will first discuss the fo
 rm factors of the trace operator\, and provide numerical checks on the val
 ue of the central charge.  Large discrepancies with respect to the exact r
 esults are observed in most cases.  \nThen\, we will consider the form fac
 tors of an (a priori unknown) operator that renormalises on Phi_{2\,2} in 
 the IR\, and we will identify numerically the operator in the UV as being 
 Phi_{2\,2}.\n\n//indico.ictp.it/event/a05359/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05359/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: " Cooperative lengthscale
 s in glass-formers: Theoretical motivations and empirical evidence "
DTSTART;VALUE=DATE-TIME:20051021T133000Z
DTEND;VALUE=DATE-TIME:20051021T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05360@ictp.it
DESCRIPTION:After decades of research\, a clear picture of the glass trans
 ition phenomenon common to scores of different materials (molecular glasse
 s\, polymers\, colloids) is still lacking.  Recent theoretical works sugge
 st the existence of dynamic criticality and growing dynamic lengthscales a
 ssociated to dynamic heterogeneity.  We will summarize the theoretical arg
 uments for such a length scale and discuss experimentally accessible multi
 -point dynamic susceptibilities quantifying the cooperative dynamics.  We 
 will present some recent numerical and experimental results illustrating t
 hese ideas.\n\n//indico.ictp.it/event/a05360/
LOCATION:ICTP - Main Building Room D (Terrace Level)
URL://indico.ictp.it/event/a05360/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Informal Seminar on Disorder and strong electron correlati
 ons "Variable range cotunneling and \nconductivity of a granular metal"\n\
 n\n\n\n\n
DTSTART;VALUE=DATE-TIME:20051025T100000Z
DTEND;VALUE=DATE-TIME:20051025T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05364@ictp.it
DESCRIPTION:The Efros-Shklovskii law for the conductivity of granular meta
 ls is interpreted as a result of a variable range cotunneling process.  Th
 e cotunneling between distant resonant grains is predominantly elastic at 
 low T  T_c.  The corresponding E-S temperature T_ES in the latter case is 
 slightly (logarithmically) T-dependent. The magnetoresistance in the two c
 ases is different: it may be relatively strong and negative at T much belo
 w T_c\, while at T>T_c it is suppressed due to inelastic processes which d
 estroy the interference.\n\n//indico.ictp.it/event/a05364/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05364/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: " Exploring crystal pol
 ymorphism by metadynamics " 
DTSTART;VALUE=DATE-TIME:20051026T150000Z
DTEND;VALUE=DATE-TIME:20051026T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05365@ictp.it
DESCRIPTION:Recently we introduced a new method for the study of structura
 l transformations in crystals which represents a conceptual extension of t
 he idea of constant-pressure simulation (R. Martonak\, A. Laio and M. Parr
 inello\, Phys. Rev. Lett.\, 2003\, 90\, 075503).  Instead of the latter\, 
  we start from the initial crystal structure and perform a search for new 
 minima of the Gibbs potential\, corresponding to new structures.  The expl
 oration of the free energy surface is performed in the space of the parame
 ters of the simulation cell (as in the Parrinello-Rahman method) by means 
 of metadynamics (A. Laio and M. Parrinello\, Proc. Natl. Acad. Sci. USA 99
 \, 12562 (2002)).  We present recent results obtained by applying the meth
 od to structure prediction in zeolite\, benzene\, the post-perovskite phas
 e of MgSiO3 and silica.  These examples demonstrate that even in highly co
 mplex polyatomic materials with large kinetic barriers as well as in organ
 ic crystals our approach allows a very efficient prediction of the polymor
 phs (for review\, see R. Martonak et al.\, Z. fuer Kristallographie\, 220\
 , 489 (2005)).\n\n//indico.ictp.it/event/a05365/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a05365/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Disorder and strong electron correlations:  "M
 icroscopic construction of the \nchiral Luttinger liquid"\n\n\n
DTSTART;VALUE=DATE-TIME:20051027T100000Z
DTEND;VALUE=DATE-TIME:20051027T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05363@ictp.it
DESCRIPTION:In this talk I shall discuss the properties of an effective th
 eory of the quantum Hall edge in terms of the low-energy projection of the
  complete many-body Hilbert space.  An explicit construction of the low-en
 ergy projection operator will be given and it will be shown how the proper
 ties of local operators are modified by the projection.  Possible applicat
 ions of the approach to the understanding of the observed non-universality
  of scaling of fermion spectral density at the edge will be discussed.\n\n
 //indico.ictp.it/event/a05363/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05363/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: " Magnetic field induce
 d rotation of the d-vector in the spin triplet superconductor Sr2Ru04 "
DTSTART;VALUE=DATE-TIME:20051102T150000Z
DTEND;VALUE=DATE-TIME:20051102T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05368@ictp.it
DESCRIPTION:We study the superconducting properties of Sr2Ru04 in presence
  of spin-orbit coupling [1-2] and  magnetic field along the crystal c-axis
 .  On the basis of a phenomenological but orbital specific description of 
 the spin dependent electron-electron attraction and a realistic quantitati
 ve account of the electronic structure in the normal state we analyze the 
 orientation of a spin triplet Cooper pair d-vector by comparing condensati
 on free energy for particular solutions.  In agreement with recent experim
 ents we predict the d-vector rotation by the field and a quantum phase tra
 nsition [3].\n\n[1] J.F. Annett\, G. Litak\, B.L. Gyorffy\, K.I. Wysokinsk
 i\, 'Interlayer Coupling and P-wave Pairing in Strontium Ruthenate'\, Phys
 .Rev. B 66 (20020 134514.\n[2] J.F. Annett\, G. Litak\, B.L. Gyorffy\, K.I
 . Wysokinski\, 'Spin -Orbit Coupling and Symmetry of the Order Parameter i
 n Strontium Ruthenate'\, Phys.Rev. B  (2005) submitted.\n[3] H. Murakawa\,
  K. Ishida\, K. Kitagawa\, Z.Q. Mao and Y. Maeno\, 'Measurement of the 101
 Ru-Knight Shift of Superconducting Sr2Ru04 in a Parallel Magnetic Field'\,
  Phys.Rev. Lett. 93 (2004) 167004.\n\n//indico.ictp.it/event/a05368/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a05368/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar  on  Statistical Physics:" Statistical mechanics 
 of random replicators and matrix games "\n
DTSTART;VALUE=DATE-TIME:20051108T150000Z
DTEND;VALUE=DATE-TIME:20051108T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05376@ictp.it
DESCRIPTION:An important objective of game theory consists in the static s
 tudy of Nash equilibria of different games.  Popular cases are situations 
 in which the payoffs take matrix form\, the well-known prisoner's dilemma 
 or the rock-scissors-paper game are simple examples.\nReplicator equations
  on the other hand describe the dynamic evolution of self-reproducing inte
 racting species for example in population dynamics and theoretical biology
 .  These equations correspond to matrix games which are played repeatedly 
 by players\, who then reproduce according to their success.\nIn this talk 
 we will discuss some recent statistical mechanics studies of replicator sy
 stems with random couplings and give an overview over their basic phenomen
 ological behaviour.  We will address different ergodic/non-ergodic phase t
 ransitions exhibited by such models.  Some work in progress on the connect
 ion between ergodicity in bi-matrix replicator systems and the number of N
 ash equilibria in the corresponding games will be discussed\, as well as t
 heir relation to the fixed points of the replicator dynamics.\n\n//indico.
 ictp.it/event/a05376/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a05376/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations:\n"S
 ubgap states in dirty superconductors and dimensional reduction"
DTSTART;VALUE=DATE-TIME:20051117T100000Z
DTEND;VALUE=DATE-TIME:20051117T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05382@ictp.it
DESCRIPTION:I will discuss the physics of subgap localized quasiparticle s
 tates in diffusive superconductors.  In particular\, I will show how the d
 oping of a diffusive superconductor with magnetic impurities leads to the 
 emergence of localized subgap quasiparticle states resulting from both flu
 ctuations of the concentration of impurity spins (classical fluctuations)\
 , and quantum interference effects (mesoscopic fluctuations).  The contrib
 utions to the subgap DOS associated to the two types of fluctuations are r
 elated by a dimensional reduction.  Finally\, I will show that these obser
 vations are generic: the complementarity between classical and mesoscopic 
 fluctuations\, as well as the relation between the associated subgap DOS i
 n terms of dimensional reduction\, emerges in other problems in the theory
  of disordered superconductors\, such as in diffusive SNS junctions\, and 
 superconductors with inhomogeneous coupling constants.\n\n//indico.ictp.it
 /event/a05382/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05382/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA  Condensed Matter Informal Seminar:\n"Weak locali
 zation and the distribution function of transmission eigenvalues" 
DTSTART;VALUE=DATE-TIME:20051123T150000Z
DTEND;VALUE=DATE-TIME:20051123T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05385@ictp.it
DESCRIPTION:Circuit Theory is a microscopic approach which allows for the 
 calculation of transport properties (conductance\, noise\, etc) of compoun
 d systems which often are encountered in mesoscopic physics\, for instance
  a quantum point contact in series to diffusive wire or a normal metal-sup
 erconductor junction.  Here we present a systematic method to include weak
  localization effects in the CT. The same method also allows to treat the 
 sample to sample fluctuations of transmission distribution.  The chain of 
 tunnel junctions and the quantum point contacts with impurities will be il
 lustrated as examples of this technique.\n\n//indico.ictp.it/event/a05385/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a05385/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations\n"Si
 ngle-electron tunnelling with strong mechanical feedback"\n
DTSTART;VALUE=DATE-TIME:20051124T100000Z
DTEND;VALUE=DATE-TIME:20051124T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05386@ictp.it
DESCRIPTION:We will first describe nanomechanical properties of suspended 
 carbon nanotubes.  Then we specifically consider weak coupling regime and 
 investigate effect of mechanical degrees of freedom on transport propertie
 s.  In certain situations\, strong mechanical feedback occurs\, which lead
 s to considerable renormalization of current and current noise.\n\n//indic
 o.ictp.it/event/a05386/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05386/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: "Studies on effects of 
 Dzyaloshinskii-Moriya interactions" \n
DTSTART;VALUE=DATE-TIME:20051130T150000Z
DTEND;VALUE=DATE-TIME:20051130T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05388@ictp.it
DESCRIPTION:Dzyaloshinskii-Moriya (DM) interaction\, due to its relativist
 ic origin\, usually is less important in magnetic systems\, compared with 
 the Heisenberg term.  However\, in some low-dimensional magnetic systems l
 ike benzoate the DM interaction substantially modifies the low-energy exci
 tation spectrum\, especially in the presence of a magnetic field.  The den
 sity matrix renormalization group studies confirm some results of the conf
 ormal field theory\, but make new predictions on crossover  between low-fi
 eld and high-field phenomena\, to be checked by experiments.  The midgap s
 tates in antiferromagnetic Heisenberg chains and ladders in a staggered fi
 eld have also been studied\, revealing new features to be confronted with 
 experiments.\n\n//indico.ictp.it/event/a05388/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a05388/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations:\n"S
 pin -1/2 fermions on spin-dependent optical lattices"\n
DTSTART;VALUE=DATE-TIME:20051201T100000Z
DTEND;VALUE=DATE-TIME:20051201T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05391@ictp.it
DESCRIPTION:We study the phase diagram of one-dimensional two-component (i
 .e. pseudo-"spin" 1/2) ultracold atomic Fermi gas.  The two atom species c
 an have different hopping or mass.  A very rich phase diagram for equal de
 nsities of the species is found\, containing Mott insulators and superflui
 ds.  We also discuss coupling such 1D systems and the experimental signatu
 res of the phases.  In particular\, we compute the "spin"-structure factor
  at small momentum\, which should reveal a "spin" gap.\n\n//indico.ictp.it
 /event/a05391/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05391/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations:\n"T
 he phase diagram of frustrated ladder models"\n
DTSTART;VALUE=DATE-TIME:20051208T100000Z
DTEND;VALUE=DATE-TIME:20051208T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a05397@ictp.it
DESCRIPTION:Using Density-Matrix Renormalization Group\, we investigate th
 e general phase diagram of the frustrated two-leg ladder with Heisenberg i
 nteractions along legs\, rungs and diagonals.  We confirm that all antifer
 romagnetic gapped states belong to the same universality class as the Hald
 ane phase.  In a three-dimensional phase diagram\, we determine a continuo
 us surface with singularities in the string-order parameter or its first d
 erivative\, corresponding to a transition between two Haldane phases with 
 different topological order.\n\n//indico.ictp.it/event/a05397/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a05397/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seminar on Chemical Physics: "Carbo
 nia: The amorphous silicalike carbon dioxide"\n
DTSTART;VALUE=DATE-TIME:20060124T103000Z
DTEND;VALUE=DATE-TIME:20060124T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a065@ictp.it
DESCRIPTION:Among the group IV elements\, carbon is the unique that at amb
 ient condition forms stable double bonds with oxygen. In contrast to the c
 ases of SiO2 and GeO2 the nonmolecular tetrahedral crystalline form of CO2
 \, phase V\, only exists at high pressure. Similarly\, while the amorphous
  phases of SiO2 (a-silica) and GeO2 (a-germania) are well known and stable
  at room condition\, the amorphous\,  nonmolecular\, phase of CO2\, althou
 gh predicted by ab-initio simulations\, had not yet been discovered.  We r
 eport on the synthesis of amorphous\, silica-like\, carbon dioxide.  The n
 on molecular amorphous phase of carbon dioxide\, a-CO2\,  that for similar
 ity with other amorphous oxide of the group IV we will call 'a-carbonia'\,
  was attained by compressing molecular phase III above 47 GPa at room temp
 erature.  In situ infrared spectra\, measured with raising temperature up 
 to 680 K\, probe the progressive formation of C-O single bonds and the sim
 ultaneous disappearing of the molecular signatures.  State-of-the-art Rama
 n and synchrotron x-ray diffraction measurements on the temperature quench
 ed sample show the amorphous character of this material.  The comparison w
 ith vibrational and diffraction patterns of amorphous silica and germania\
 , shows that a-carbonia is homologous to those glasses.  These findings do
  extend the scenario of archetypal network-forming disordered systems such
  as a-silica\, a-germania\, a-Si and a-Ge\, and water.\n\n//indico.ictp.it
 /event/a065/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a065/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Disorder and strong electron correlations:\n"L
 ocally accessible information and distillable entanglement"
DTSTART;VALUE=DATE-TIME:20060202T100000Z
DTEND;VALUE=DATE-TIME:20060202T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a067@ictp.it
DESCRIPTION:A different type of complementarity relation is found between 
 locally accessible information and final average entanglement for a given 
 ensemble.  In some well known distillation protocols this complementary re
 lation is optimally satisfied.  There is some interesting trade off betwee
 n locally accessible information and distilled entanglement for some state
 s.\n\n//indico.ictp.it/event/a067/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a067/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Disorder and strong electron correlations: "Un
 iversalities in electron scattering on mesoscopic obstacles"\n
DTSTART;VALUE=DATE-TIME:20060209T100000Z
DTEND;VALUE=DATE-TIME:20060209T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0617@ictp.it
DESCRIPTION:We study electron propagation through a random array of rare s
 trong scatterers (e.g.\,  quantum antidots) of geometrical sizes much grea
 ter than the electron wavelength.  It turns out that for a wide class of s
 catterer's shapes\, the ratio of the transport and the total elastic scatt
 ering rates does not depend on the scatterer's shape and is determined ent
 irely by the space dimension.  Possible experimental manifestations are di
 scussed.\n\n//indico.ictp.it/event/a0617/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0617/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA/Democritos Condensed Matter Seminar: "Statistical
  physics applied to the development of biopharmaceuticals" 
DTSTART;VALUE=DATE-TIME:20060215T150000Z
DTEND;VALUE=DATE-TIME:20060215T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0618@ictp.it
DESCRIPTION:Biopharmaceuticals are globular protein or antibody drugs.  It
  is desired that they be formulated at high concentrations in aqueous solu
 tions.  However\, due to hydrophobic interactions and other effects\, thes
 e molecules tend to aggregate in solution.  Aggregation not only renders t
 hese molecules inactive\, but also it can cause these molecules to be immu
 nogenic\, one of the worst properties that a drug can have.  Using fundame
 ntal techniques from statistical physics\, we have developed a completely 
 new conceptual approach to tailor design additives to prevent aggregation 
 of these complex molecules.   We have also performed some initial experime
 ntal confirmations of our theories.  In addition to the development of bio
 pharmaceutical formulations\, our research has significance for understand
 ing how living systems prevent protein aggregation and for understanding h
 uman diseases such as Alzheimer’s and Huntington’s diseases.
 \n\n//indico.ictp.it/event/a0618/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0618/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Disorder and strong electron correlations: ""S
 pinless fermionic ladders in a magnetic field: Phase diagram"\n
DTSTART;VALUE=DATE-TIME:20060216T100000Z
DTEND;VALUE=DATE-TIME:20060216T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0620@ictp.it
DESCRIPTION:The system of interacting spinless fermions hopping on a two-l
 eg ladder exhibits series of quantum phase transitions when subjected to e
 xternal magnetic field.  At half filling\, these are either U(1) Gaussian 
 phase transitions between two phases with distinct types of long-range ord
 er or Berezinskii-Kosterlitz-Thouless transitions between ordered and gapl
 ess phases.\n\n//indico.ictp.it/event/a0620/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0620/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and Strong Electron Correlations: "Mo
 tt insulator-superfluid domains for confined BEC in optical lattices"\n\n
DTSTART;VALUE=DATE-TIME:20060223T100000Z
DTEND;VALUE=DATE-TIME:20060223T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0628@ictp.it
DESCRIPTION:Bose Einstein Condensates in optical lattices under an externa
 l confinement are expected to form coexisting Superfluid and Mott-Insulati
 ng domains [1] reminiscent of the quantum phase transition for the infinit
 e system [2].  The experimentally observed transition [3] is presently asc
 ribed to relative shrinking/widening of the different domains.  The presen
 ce of superfluid domains and the excitations of the interfaces between the
  two phases play a crucial role in the time evolution of the system under 
 modulations of the parameters of the system as well as in its thermodynami
 c properties. \nIn this work we derive the dispersion relation of the surf
 ace waves at the interfaces between Mott-Insulating and Superfluid phases.
   We then calculate their contribution to the heat capacity of the system 
 and show how its low temperature scaling allows a direct experimental test
  of the existence and properties of Mott-Superfluid domains [4].  A furthe
 r independent probe of the domains is considered studying the response of 
 the system to a periodic modulation of the intensity of the optical lattic
 e.  The induced parametric resonances of the superfluid excitations are re
 flected in the energy absorption by the atomic cloud\, yielding informatio
 n about the structure of different domains.\n\n[1] D. Jaksch et al. \, Phy
 s. Rev. Lett. 81\, 3108 (1998) \n[2] M. P. A. Fisher et al. \, Phys. Rev. 
 B 40\, 546 (1989) \n[3] M. Greiner et al. \, Nature 415\, 39 (2002) \n[4] 
 E. Mariani and A. Stern\, Phys. Rev. Lett. 95\, 263001 (2005)\n\n//indico.
 ictp.it/event/a0628/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0628/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations\n"Ko
 ndo physics and strongly correlated superconductivity in model fullerene c
 onductors"
DTSTART;VALUE=DATE-TIME:20060302T100000Z
DTEND;VALUE=DATE-TIME:20060302T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0632@ictp.it
DESCRIPTION:The effects of electronic correlations on superconductivity ar
 e investigated by means of\nDynamical Mean Field Theory (DMFT) in a model 
 for alkali doped fullerenes. It is shown\nthat the proximity to a Mott tra
 nsition amplifies the $s$-wave phonon-mediated pairing\nmechanism built in
 to the model. It leads to a superconduting pocket adjacent the Mott\ninsul
 ator with a large superconducting gap in comparison with the corresponding
  BCS value.\nThe physical properties of this strongly correlated supercond
 uctor are compatible with the\nexperimental data available on fullerenes. 
 Yet\, contradicting the common belief for fullerenes\,\nsuperconductivity 
 in the model is not of the BCS-type nor is the normal state a conventional
 \nFermi-liquid. We find on the contrary several aspects which rather resem
 ble those of\ncuprate superconductors\, such as an increase of Drude weigh
 t accompaning the onset of\nsuperconductivity. We identify the origin of t
 hese anomalies to the unconventional properties\ndisplayed by the Anderson
  impurity model for a C$_{60}^{n-}$ molecule onto which the\nlattice model
  maps within DMFT.\n\n//indico.ictp.it/event/a0632/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0632/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Disorder and strong electron correlations:\n"T
 -duality in the supersymmetric theory of disordered quantum systems"
DTSTART;VALUE=DATE-TIME:20060309T100000Z
DTEND;VALUE=DATE-TIME:20060309T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0641@ictp.it
DESCRIPTION:Two variants of supermatrix field theory are discussed that de
 scribe statistics of disordered quantum systems\, e.g. random matrix Hamil
 tonians.  One of them (nonlinear supersymmetric sigma model) is suitable f
 or description of disordered systems with delocalized eigenfunctions and s
 trongly correlated spectral statistics (disordered metals)\, the other is 
 convenient for systems with localized or quasi-localized eigenfunctions.  
 These two variants of theory are dual to each other but defined on the tar
 get space of supermatrices with different symmetry ("T-duality").  An impl
 ication of the symmetry difference for disordered one-dimensional single-a
 nd multi-channel systems is discussed.\n\n//indico.ictp.it/event/a0641/
LOCATION:ICTP
URL://indico.ictp.it/event/a0641/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: " Quantum information\,
  measurements and their applications in molecular biology " 
DTSTART;VALUE=DATE-TIME:20060315T150000Z
DTEND;VALUE=DATE-TIME:20060315T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0655@ictp.it
DESCRIPTION:The information-theoretical\, dynamical and statistical aspect
 s of quantum measurements are reviewed.  An example of dynamics of system 
 is considered which includes the measured object S\,  the information stor
 ing device O and its environment E.  From the information-theoretical view
 point\, the measurement is the transfer of information J from S to O with 
 the possible J losses\, due to O\,E decoherent interactions.  It’s 
 shown that the principal constraints\, induced by Heisenberg commutation r
 elations\, restrict significantly the amount of  information J about S sta
 te which can be transferred to O in the individual event.  As a result an 
  ability of O to discriminate the different  S states is much weaker compa
 red to the  predictions from the purely dynamical theory.  Such restrictio
 ns may explain experimentally observed stochasticity of measurement outcom
 es\, i.e. the collapse of  quantum state.  The possible applications to mo
 lecular biology\, bioelectronics and theory of brain functions are discuss
 ed.\n\n//indico.ictp.it/event/a0655/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0655/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations\n"Qu
 antum spin chain and O(3) non-linear sigma model with theta-term"
DTSTART;VALUE=DATE-TIME:20060316T100000Z
DTEND;VALUE=DATE-TIME:20060316T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0656@ictp.it
DESCRIPTION:Quantum anti-ferromagnetic chains admit a continuum formulatio
 n in terms of O(3) non-linear sigma model with topological theta term.  Th
 e massive (theta=0)  or massless (theta=pi) nature of this field theory is
  referred in the literature as Haldane conjecture.  Both values of theta c
 orrespond to integrable model\, while for all other values the correspondi
 ng theory is not integrable.   In this talk we discuss the evolution of th
 e spectrum by varying theta.  We show that the massless particles (spinons
 ) present at theta=pi get confined once theta moves away from this value a
 nd that the spectrum consists of a stable triplet of massive particles for
  all values of theta and a singlet state of higher mass.  The singlet\, ho
 wever\, is a stable particle only in an interval of values of theta close 
 to pi\, whereas it becomes a resonance below a critical value theta_c.\n\n
 //indico.ictp.it/event/a0656/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0656/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Statistical Physics: " The emergence of popula
 rity:  Statistical mechanics of movie income "\n
DTSTART;VALUE=DATE-TIME:20060324T130000Z
DTEND;VALUE=DATE-TIME:20060324T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0663@ictp.it
DESCRIPTION:Why do certain products/ideas become extremely popular\, while
  other quite similar entities don't even make it off the mark?  Can popula
 rity be understood simply as a statistical phenomenon\, completely indepen
 dent of the intrinsic quality of the product/idea? In this work\, we look 
 in detail at movie popularity\, analysing the income of movies released in
  recent years\, in both USA and India.  Our results offer interesting para
 llels with popularity in other fields\, e.g.\, of scientific papers as mea
 sured by citations.  We conclude with discussion of models we have propose
 d to explain various features of the observed movie popularity distributio
 n.\n\n//indico.ictp.it/event/a0663/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0663/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations:\n"C
 urrent division in parallel: A surprise"\n
DTSTART;VALUE=DATE-TIME:20060330T100000Z
DTEND;VALUE=DATE-TIME:20060330T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0670@ictp.it
DESCRIPTION:Consider some pieces of a wire of superconducting material hav
 ing unequal lengths in general and connected in parallel.  If\, now\, the 
 combination\, assumed to be in the normal state\, is connected to a dc cur
 rent source\, the total current is known well to divide resistively.   If\
 , on the other hand\, the conductors were in the superconducting state\, t
 he current is again known\, though less well now\, to divide inductively. 
  If\, however\, the combination of the current carrying conductors\, initi
 ally in the normal state is cooled to and below the superconducting transi
 tion temperature\, the current distribution is experimentally found to evo
 lve towards equipartition. This indeed is a surprise.  In this talk\, I wi
 ll present our experimental findings\, and suggest a physical mechanism fo
 r and a theoretical treatment of this self-organization of the current tow
 ards equipartition on cooling through the transition.\n\n//indico.ictp.it/
 event/a0670/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0670/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos\n\nInformal Seminar on Chemical Physics: "In
 trinsic point defects in semiconductors: How the physics of a tiny entity 
 protrudes into the macroscopic world"\n
DTSTART;VALUE=DATE-TIME:20060331T100000Z
DTEND;VALUE=DATE-TIME:20060331T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0674@ictp.it
DESCRIPTION:Intrinsic point defects in semiconductor represent the smalles
 t conceivable perturbation of the ideal crystal lattice.  These omnipresen
 t defects display appealing physical properties that have important techno
 logical implications.  Intrinsic point defects possess localized states de
 ep within the band gap and can compensate dopants thus effecting the elect
 ronic properties of a material. The ground state of vacancies (empty latti
 ce sites)\, for example\, is governed by a competition between th electron
 -electron interaction and electron-phonon coupling\, eventually resulting 
 in a competion between a  "high-spin''\, high symmetry o a "low  spin''\, 
 Jahn-Teller distorted ground state. On the other hand  intrinsic defects a
 re mobile and can diffuse through the material.  They are thus pivotal for
  the mass transport and for the annealing of processed material.  The talk
  will illustrate these aspects for intrinsic defects in Silicon Carbide fr
 om the theoretical point of view.  Emphasis is also put on the link to rec
 ent experimental work that enabled together with theoretical efforts an id
 entification of individual defects.\n\n//indico.ictp.it/event/a0674/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0674/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and Strong Electron Correlations:\n"F
 luxoid states and oscillations of the Josephson current in low-dimensional
  weak"
DTSTART;VALUE=DATE-TIME:20060406T100000Z
DTEND;VALUE=DATE-TIME:20060406T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0678@ictp.it
DESCRIPTION:I will discuss charge transport in a specific type of low-dime
 nsional normal metal (N)-superconductor (S) systems which can exhibit near
 ly reflectionless tunneling of Cooper pairs even for low-transparency inte
 rfaces.  In SNS structures such reflectionless tunneling results in anomal
 ous Andreev bound states that make a dominant contribution to the Josephso
 n current. An interesting situation occurs in systems with multiply connec
 ted superconductors where the Andreev bound states are coupled to an exter
 nal magnetic flux via the fluxoid quantization.  In this case magnetic osc
 illations of the critical Josephson current analogous to the Little-Parks 
 effect are predicted.  I will also discuss experiments presumably demonstr
 ating the reflectionless tunneling of Cooper pairs.\n\n//indico.ictp.it/ev
 ent/a0678/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0678/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and Strong Electron Correlations:\n"T
 he challenge of error correction in quantum computation"\n
DTSTART;VALUE=DATE-TIME:20060420T100000Z
DTEND;VALUE=DATE-TIME:20060420T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0694@ictp.it
DESCRIPTION:I compare the software approach to the error correction in qua
 ntum computation to the hardware one in which the protection from errors i
 s due to a proper choice of the microscopic Hamiltonian. I show that from 
 the theoretical point of view the systems protected at the physical level 
 are characterized by the topological order parameter.  I argue that neithe
 r the software correction nor this topological protection alone can be suf
 ficient to achieve a stable computation with today technology.  The most p
 romising approach seems to combine some level of hardware error correction
  that can be achieved in mesoscopic physical systems characterized by topo
 logical order parameter with the software error correction at a higher lev
 el.  I review the simplest spin models and the small size Josephson juncti
 on arrays that provide this protection and discuss the requirements on the
 m imposed by the software error correction.\n\n//indico.ictp.it/event/a069
 4/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0694/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations\n"El
 ectronic properties of graphene and graphitic bilayers"
DTSTART;VALUE=DATE-TIME:20060425T100000Z
DTEND;VALUE=DATE-TIME:20060425T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0697@ictp.it
DESCRIPTION:Electrons in graphitic monolayers (graphene) and bilayers have
  very unusual properties:  these are chiral quasiparticles which are chara
 cterized by the Berry phase Pi (in graphene)  and 2Pi (in a bilayer). The 
 chirality of quasiparticles manifests itself in a peculiar Landau level sp
 ectrum and in the form of the quantum Hall effect. It also generates speci
 fic quantum transport characteristics\, such as selective transmission and
  magneto-resistance in ballistic n-p junctions in graphene\, and it gives 
 rise to a rich variety of weak localisation regimes in a monolayer and a b
 ilayer.\n\n//indico.ictp.it/event/a0697/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0697/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations: \n"
 Minigap in superconductor-ferromagnet junctions with inhomogenous magnetiz
 ation"\n\n
DTSTART;VALUE=DATE-TIME:20060427T100000Z
DTEND;VALUE=DATE-TIME:20060427T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0698@ictp.it
DESCRIPTION:We consider the minigap in a disordered ferromagnet (F) in con
 tact with a superconductor (S)  in the situation when the magnetization of
  the F is inhomogeneous in space and noncollinear.  If the magnetization i
 s strongly inhomogeneous\, it effectively averages out\, and the minigap s
 urvives up to the exchange field $h_c ~ (L/a) E_{Th}$\, where $L$ is the t
 hickness of the F\, $a$ is the scale on which the magnetization varies\, a
 nd $E_{Th}$ is the Thouless energy.  Technically\, we use the "triplet" ve
 rsion of the Usadel equations including both singlet and triplet component
 s of the Green's functions. In many cases\, the effect of disordered magne
 tization may be effectively included in the conventional Usadel equations 
 as the spin-flip scattering term. In the case of low-dimensional magnetic 
 inhomogeneities (we consider spiral magnetization as an example)\,  howeve
 r\, the full set of "triplet" equations must be solved.\n\n//indico.ictp.i
 t/event/a0698/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a0698/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and Strong Electron Correlations:\n"H
 ow to have fun with two-dimensional frustrated ferromagnets..."\n
DTSTART;VALUE=DATE-TIME:20060504T100000Z
DTEND;VALUE=DATE-TIME:20060504T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06106@ictp.it
DESCRIPTION:The theoretical study of  two-dimensional "spin liquids''  ---
  quantum magnets which remain disordered at the very lowest temperatures -
 -- has mostly been confined to models with competing or frustrated antifer
 romagnetic (AF) interactions. The resulting ground states typically involv
 e strong singlet bonds between spins\, which give rise to a gap in the spi
 n excitation spectrum.  None the less\, the best characterized experimenta
 l realization of a spin liquid is believed to occur in two--dimensional fi
 lms of solid $^3$He\, where the interactions between spins are predominant
 ly ferromagnetic (FM)\, and the resulting state is gapless.  Here we consi
 der whether the breakdown of long ranged FM order offers a new route uncon
 ventional magnetic ground states in two dimensions\, considering in detail
  the case of the square lattice frustrated ferromagnet.\n\n//indico.ictp.i
 t/event/a06106/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a06106/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: "Kondo effect in real l
 ife"
DTSTART;VALUE=DATE-TIME:20060510T150000Z
DTEND;VALUE=DATE-TIME:20060510T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06111@ictp.it
DESCRIPTION://indico.ictp.it/event/a06111/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a06111/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Chemical Physics: "Inelastic X-ray scattering 
 from phonons at high pressure"\n
DTSTART;VALUE=DATE-TIME:20060516T130000Z
DTEND;VALUE=DATE-TIME:20060516T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06117@ictp.it
DESCRIPTION:Since the first pioneering experiments in the late 1980â€
 ™s\, inelastic X-ray scattering (IXS) with meV energy resolution has evo
 lved rapidly into a valuable spectroscopic tool to study phonon dispersion
  in a large variety of materials.  IXS is particularly well suited for dis
 ordered systems\, samples only available in small quantities\, or material
 s studied under very high pressure.  Thanks to the outstanding brilliance 
 of third generation synchrotron sources and performing focusing X-ray opti
 cs\, phonon studies to 50 GPa and beyond are nowadays routinely performed.
   The present capabilities of IXS shall be illustrated by selected example
 s of high-pressure work.\n\n//indico.ictp.it/event/a06117/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a06117/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and Strong Electron Correlations:\n"T
 he interplay of spin and charge channels \nin zero dimensional system"\n
DTSTART;VALUE=DATE-TIME:20060518T100000Z
DTEND;VALUE=DATE-TIME:20060518T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06118@ictp.it
DESCRIPTION:We consider the interplay of the charge and spin zero-mode int
 eractions in quantum dots.  The non-perturbative effects of zero-mode inte
 raction are described in terms of the propagation of gauge bosons associat
 ed with charge (U(1)) and spin  (SU(2)) fluctuations in the dot.  The Coul
 omb and longitudinal spin components are accounted for exactly\, while tra
 nsverse spin fluctuations are studied perturbatively (with  the easy-axis 
 anisotropy).  These fluctuations become important as one approaches the St
 oner instability.  We study the influence of spin on the differential cond
 uctance as well as the dynamic spin susceptibility.\n\n//indico.ictp.it/ev
 ent/a06118/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a06118/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on  Disorder and strong electron correlations "Tr
 iplet pairing due to spin-orbit-assisted electron-phonon coupling"\n
DTSTART;VALUE=DATE-TIME:20060525T100000Z
DTEND;VALUE=DATE-TIME:20060525T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06122@ictp.it
DESCRIPTION:We propose a microscopic mechanism for triplet pairing due to 
 spin-orbit-assisted electron interaction with optical phonons in a crystal
  with a complex unit cell.  Using two examples of electrons with symmetric
  Fermi surfaces in crystals with either a cubic or a layered square lattic
 e\, we show that spin-orbit-assisted electron-phonon coupling can\, indeed
 \, generate triplet pairing and that\, in each case\, it predetermines the
  tensor structure of a p-wave order parameter.\n\n//indico.ictp.it/event/a
 06122/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a06122/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Mesoscopic thermodynam
 ics and coupled ordering in soft matter" \n
DTSTART;VALUE=DATE-TIME:20060526T100000Z
DTEND;VALUE=DATE-TIME:20060526T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06124@ictp.it
DESCRIPTION:Thermodynamics is a keystone in science and engineering\, brid
 ging the gap between  fundamentals and applications.  However\, engineers 
 often have to design processes and products where classical thermodynamics
  may become insufficient\, e.g.\, strongly fluctuating and nanosize system
 s\, or dissipative systems under conditions far away from equilibrium.  A 
 new field\, “mesoscopic thermodynamics” can be defined as a se
 mi-phenomenological approach to the systems and phenomena in which a lengt
 h - intermediate between the atomistic scale and the macroscopic scale - e
 merges and where such a length explicitly affects thermodynamic properties
 .  Finite-size effects and fluctuations\, critical phenomena and spinodal 
 decomposition\, wetting and interfacial phenomena\, self-organized critica
 lity and guided self-assembly\, thermodynamics of pattern formation and fr
 actals are examples of the topics addressed in mesoscopic thermodynamics. 
  While conventional methods of statistical mechanics remain to be the fund
 amental background of mesoscopic thermodynamics\, “coarse-grainedâ
 € approaches\, such as the Landau-Ginzburg local free-energy functiona
 l\, can be successfully applied for describing apparently very different p
 henomena on mesoscales - from critical fluctuations to interfacial profile
 s\, from porous media to micelles and microemulsions.  These approaches em
 phasize universality and utilize a number of powerful theoretical concepts
 \, such as renormalization-group theory\, finite-size scaling\, and percol
 ation theory.  A coupling between different order parameters is ubiquitous
  in soft matter.  At meso and nano scales\, coupling between order paramet
 ers is associated with competition between different correlation lengths a
 nd may result in coupled dynamics of fluctuations.  As an example\, I will
  discuss coupled mesoscopic dynamics (“avoided crossing”) caus
 ed by competition between mesoscales in near-critical polymer solutions.  
 Similar phenomena are expected in a broad range of soft-matter materials a
 s gels\, microemulsions\, and lyotropic liquid crystals\, wherever critica
 l fluctuations may couple with the mesoscopic structure.\n\n//indico.ictp.
 it/event/a06124/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a06124/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations\n"A 
 fuzzy description of Quantum Hall Physics"\n
DTSTART;VALUE=DATE-TIME:20060601T100000Z
DTEND;VALUE=DATE-TIME:20060601T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06125@ictp.it
DESCRIPTION:Noncommutative Chern-Simons action has been proposed as an eff
 ective description of the dynamics of infinite Quantum Hall samples projec
 ted into the lowest Landau level.  A special kind of regularization of thi
 s model gives rise to a matrix Chern-Simons theory\, that can be used to d
 escribe finite droplets.  I will try to give a self-contained and physical
 ly motivated introduction to both noncommutative Chern-Simons theory and i
 ts matrix version\, and their application to  Fractional Quantum Hall Effe
 ct.\n\n//indico.ictp.it/event/a06125/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a06125/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: "Possible exact thresho
 ld for toric code of quantum memory" \n
DTSTART;VALUE=DATE-TIME:20060614T100000Z
DTEND;VALUE=DATE-TIME:20060614T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06133@ictp.it
DESCRIPTION:The error threshold of toric code\, beyond which the stored qu
 antum state deteriorates\, is closely related to the multicritical point o
 f the 2d spin glass.   It is thus important to accurately determine the lo
 cation of the multicritical point of 2d spin glass systems.  We have devel
 oped a scheme to solve this problem\,  which is likely to give the exact r
 esults\, using duality arguments.\n\n//indico.ictp.it/event/a06133/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a06133/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Statistical Physics: "Mean exit times and surv
 ival probability of equity assets"
DTSTART;VALUE=DATE-TIME:20060614T150000Z
DTEND;VALUE=DATE-TIME:20060614T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06134@ictp.it
DESCRIPTION:We study theoretical and empirical aspects of the mean exit ti
 me of financial time series. The theoretical modeling is done within the f
 ramework of continuous time random walk.  We empirically verify that the m
 ean exit time follows a quadratic scaling law and it has associated a pre-
 factor which is specific to the analyzed stock.  We perform a series of st
 atistical tests to determine which kind of correlation are responsible for
  this specificity.  The main contribution is associated with the autocorre
 lation property of stock returns.  We introduce and solve analytically bot
 h a two-state and a three-state Markov chain models.  The analytical resul
 ts obtained with the two-state Markov chain model indicate the possibility
  of obtaining a data collapse of the measured MET profiles in a single mas
 ter curve.\n\n//indico.ictp.it/event/a06134/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a06134/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: "Orbital densities func
 tional"
DTSTART;VALUE=DATE-TIME:20060912T150000Z
DTEND;VALUE=DATE-TIME:20060912T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06268@ictp.it
DESCRIPTION:Local density approximation (LDA) to density functional theory
  (DFT) has continuous derivative of total energy as a number of electrons 
 function and continuous exchange-correlation potential\, while in exact DF
 T both should be discontinuous as number of electrons goes through an inte
 ger value.  We propose orbital densities functional (ODF) (with orbitals d
 efined as Wannier functions) that by construction obeys this discontinuity
  condition.  By its variation one-electron equations are obtained with pot
 ential in the form of projection operator.  The operator increases a separ
 ation between occupied and empty bands thus curing LDA deficiency of energ
 y gap value systematic underestimation.  Orbital densities functional mini
 mization gives ground state orbital and total electron densities.  The ODF
  expression for energy of orbital densities fluctuations around the ground
  state values defines ODF fluctuation Hamiltonian that allows to treat cor
 relation effects.  Dynamical mean-field theory (DMFT) was used to solve th
 is Hamiltonian with quantum Monte Carlo (QMC) method for effective impurit
 y problem.  We have applied ODF method to the problem of metal insulator t
 ransition in lanthanum trihydride LaH{3-x}. In LDA calculations ground sta
 te of this material is metallic for all values of hydrogen non-stoichiomet
 ry $x$ while experimentally the system is insulating for x\n\n//indico.ict
 p.it/event/a06268/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a06268/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations:\n"S
 emi-linear response\, the absorption of radiation by small metal grains\, 
 and the conductance of mesoscopic devices"
DTSTART;VALUE=DATE-TIME:20060914T100000Z
DTEND;VALUE=DATE-TIME:20060914T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06271@ictp.it
DESCRIPTION:Consider a driven quantum system\, such as a small conducting 
 particle driven by an electromagnetic radiation\, or a mesoscopic ring dri
 ven by an electromotive force.  The common practice is to calculate the re
 sponse (rate of energy absorption\, conductance) using the Kubo Formula.  
 We argue that this may lead to a huge over-estimate.  In general it is ess
 ential to take into account the structure of the perturbation matrix\, whi
 ch may imply percolation-like dynamics.  These structures are determined b
 y both semiclassical and random matrix theory consideration\, and cannot b
 e ignored.\n\n//indico.ictp.it/event/a06271/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a06271/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Disorder and strong electron correlations:\n" 
 'Massive neutrinos' in graphene "
DTSTART;VALUE=DATE-TIME:20061010T100000Z
DTEND;VALUE=DATE-TIME:20061010T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06293@ictp.it
DESCRIPTION:We study interacting Dirac quasiparticles in graphene\, focusi
 ng on such experimentally relevant issues as a dynamically generated mass 
 due to unscreened Coulomb interactions\,  (anti)localization in the presen
 ce of disorder\, and anomalous Quantum Hall effect.\n\n//indico.ictp.it/ev
 ent/a06293/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a06293/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Statistical Physics: " Path to synchronization
  in complex networks "
DTSTART;VALUE=DATE-TIME:20061011T100000Z
DTEND;VALUE=DATE-TIME:20061011T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06292@ictp.it
DESCRIPTION:We study the synchronizability of complex networks whose degre
 e distributions are Poisson or heavy tailed (scale-free).  Our analysis is
  based on the dynamics of the Kuramoto's model in a system of coupled osci
 llators that interact in these topologies.  We investigate the evolution o
 f patterns of synchronized oscillators\, and connect this local informatio
 n with global measures of synchronization in the system.  The results show
  that\, there are values for the intensity of the interaction that make de
 gree homogeneous networks more synchronizable than heterogeneous networks 
 and vice-versa.  Moreover\, we study the synchronization transition in sca
 le-free networks that are characterized by tunable local properties.  Our 
 study highlights the need of exploring the whole phase diagram and not onl
 y the stability of the fully synchronized state\, where most studies have 
 been done up to now.\n\n//indico.ictp.it/event/a06292/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a06292/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Diversity begets stabili
 ty in an evolutionary model"\n
DTSTART;VALUE=DATE-TIME:20061018T100000Z
DTEND;VALUE=DATE-TIME:20061018T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06303@ictp.it
DESCRIPTION://indico.ictp.it/event/a06303/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a06303/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Statistical Physics: "Time scales in evolution
 ary dynamics"
DTSTART;VALUE=DATE-TIME:20061019T100000Z
DTEND;VALUE=DATE-TIME:20061019T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06304@ictp.it
DESCRIPTION:A fundamental\, profound and broad-ranging unsolved question i
 s how cooperation among animals and humans has evolved.  Evolutionary game
  theory is the mathematical framework that has provided the deepest insigh
 ts into this issue.  Simple games such as the Prisoners' Dilemma\, the sno
 wdrift game or the stag-hunt game have been the subject of intense experim
 ental and theoretical work along this line\, but no previous approach has 
 considered the influence of different evolution rates.\nHere we show that 
 the pace at which selection acts on the population is crucial for the appe
 arance and stability of cooperation. Even in non-dilemma games such as Har
 mony\, where cooperation is the only possible rational outcome\, defectors
  may be selected for if population renewal is very rapid. We carry out a t
 horough study of the different types of 2x2 symmetrical games and find tha
 t unexpected results arise in all three cases. We discuss the nature of th
 e changes induced by the time scale competition and point out the necessit
 y to include a discussion of the time scale of evolution in any study abou
 t cooperation.\n\n//indico.ictp.it/event/a06304/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a06304/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: "Theory of enhanced the
 rmoelectric performance in strongly correlated multilayered nanostructures
 " 
DTSTART;VALUE=DATE-TIME:20061025T150000Z
DTEND;VALUE=DATE-TIME:20061025T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06311@ictp.it
DESCRIPTION:We illustrate how the electronic charge reconstruction near th
 e interfaces of metal/strongly-correlated barrier/metal devices  can lead 
 to a significant  enhancement of the thermoelectric  response due to the b
 reaking of particle-hole symmetry.  We show how one can achieve effective 
 Seebeck coefficients larger than 150 μV/K and effective electronic figure
 s-of-merit ZT higher than 1.  Our theory shows that electronic thermoelect
 ric transport properties can be significantly enhanced from inhomogeneitie
 s created by the rearrangement of charge near the interfaces\, and that bu
 lk figures-of-merit cannot generically be employed to determine the figure
 -of-merit of a multilayered  nanostructure.\n\n//indico.ictp.it/event/a063
 11/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a06311/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations:" No
 n-equilibrium critical behaviours in driven diffusive systems "\n
DTSTART;VALUE=DATE-TIME:20061026T100000Z
DTEND;VALUE=DATE-TIME:20061026T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06306@ictp.it
DESCRIPTION:Many physical systems in equilibrium undergo phase transitions
  when the external control parameters (such as temperature\, pressure\, et
 c)  approach certain values.  Among these transitions\, critical phenomena
  are characterized by an emerging collective behaviour - on a scale much l
 arger than the microscopic one - and by a certain degree of universality: 
  different physical systems may display the same critical behaviour.  This
  allows one to study such phenomena via extremely simplified models.  The 
 lattice gas (equivalent to the Ising model) was introduced to study the li
 quid-vapour transition and played a primary role in the development of the
  theory of equilibrium phase transitions and collective critical phenomena
 .\nIn this talk I discuss how the critical behaviour of the lattice gas is
  affected by those external forces which drive the model into non-equilibr
 ium steady states.\n\n//indico.ictp.it/event/a06306/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a06306/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations\n"Bo
 sonization approach to charge and spin dynamics of 1D fermions"\n
DTSTART;VALUE=DATE-TIME:20061102T100000Z
DTEND;VALUE=DATE-TIME:20061102T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06316@ictp.it
DESCRIPTION:The dynamics of fermions in clean quantum wires are generally 
 described by the low-energy Tomonaga-Luttinger model which assumes forward
  scattering interactions and a linearized  dispersion: $\\xi_k = v(|k|-k_F
 )$\, around the Fermi points $\\pm k_F$.  This model can be solved exactly
  with the help of the bosonization technique which maps the low-energy int
 eracting fermions to free bosons. At these low-energies the dynamics of sp
 in and charge excitations are separated and dissipation-less. In this talk
  some higher-energy features of the dynamics will be explored with the hel
 p of bosonization by taking into account band-curvature corrections to the
  spectrum: $\\xi_k = v(|k|-k_F) + (|k|-k_F)2/2m$. The latter lead to inter
 actions between the low-energy bosons which are crucial to the description
  of the precise line-shape of dynamical correlators (in relation with plas
 mon life-time and optical fermion  conductivity).  I will show how this no
 n-linear bosonization can be implemented\, discuss its efficiency and limi
 tations and finally give signatures of spin-charge coupling due to band-cu
 rvature on dynamical correlation functions. The latter could be observed e
 xperimentally via energy and momentum resolved spectroscopies.\n\n//indico
 .ictp.it/event/a06316/
LOCATION:ICTP Main Building Room 239
URL://indico.ictp.it/event/a06316/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Statistical Physics: "Statistical physics appr
 oach to models of risk"
DTSTART;VALUE=DATE-TIME:20061108T100000Z
DTEND;VALUE=DATE-TIME:20061108T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06317@ictp.it
DESCRIPTION:We look at the problem of estimating risk (Operational Risk\, 
 Credit Risk and Market Risk) and argue that risk elements\, such as proces
 ses in an organization\, credits  in a loan-portfolio or share prices in a
 n investment portfolio cannot be regarded as independent. This naturally l
 eads to formulating risk models as dynamical models of interacting degrees
  of freedom (particles).  The operational risk and credit risk problems ca
 n be cast into a language describing heterogeneous lattice gasses\, in whi
 ch interaction parameters and non-uniform chemical potentials have an inte
 rpretation in terms of unconditional and conditional failure probabilities
 .  For the market risk problem\, a minimal interacting generalization of t
 he classical Geometric Brownian Motion model leads to a formulation of mar
 ket dynamics that is formally similar to the dynamics of graded response n
 eurons.  We describe elements of the statistical mechanical analysis of th
 ese models to reveal their macroscopic properties.\n\n//indico.ictp.it/eve
 nt/a06317/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a06317/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Gaussian-to-Lévy statis
 tical crossover in a random amplifying medium"
DTSTART;VALUE=DATE-TIME:20061117T100000Z
DTEND;VALUE=DATE-TIME:20061117T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06332@ictp.it
DESCRIPTION:We have studied the emission from Random Amplifying Media (RAM
 ) by means of experiments\, theoretical analysis and Monte Carlo simulatio
 n.  We report the crossover from the Gaussian to the Lévy statistics in t
 he fluctuation of emission intensity from RAM and demonstrate the tunabil
 ity of Lévy exponent.\nIn order to examine the competition between the sc
 attering and the gain\, we studied by Monte Carlo simulation\, the emissio
 n from conventional dye scatterer systems and the reverse case of active s
 catterers suspended in a passive bulk. The marked difference in their emis
 sion features\, especially at high scatterings\, lead us to classify them 
 as the Direct RAM (D RAM) and the Reverse RAM (R RAM) respectively.\n\n//i
 ndico.ictp.it/event/a06332/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a06332/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations:\n"O
 ne-dimensional fermions beyond the Luttinger liquid paradigm"
DTSTART;VALUE=DATE-TIME:20061123T100000Z
DTEND;VALUE=DATE-TIME:20061123T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06334@ictp.it
DESCRIPTION:In this presentation I will review our recent work on dynamic 
 correlations in a system of one-dimensional fermions with a nonlinear disp
 ersion.  It turns out that in the presence of interactions the nonlinear d
 ispersion results in new universal features in the frequency and the wave 
 vector dependence of the dynamic structure factor (density-density correla
 tion function). These features are similar in origin to the well-known Fer
 mi-edge singularities in the X-ray absorption spectra of metals.  Besides 
 being of interest for its own sake\,  detailed understanding of the struct
 ure factor is crucial for the description of a variety of transport phenom
 ena that owe their existence to the particle-hole asymmetry\, such as Coul
 omb drag\, thermopower\, and photovoltaic effect\, as well as for the desc
 ription of inelastic neutron scattering off antiferromagnetic spin chains.
 \n\n//indico.ictp.it/event/a06334/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a06334/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seminar on Chemical Physics\n"Lifti
 ng of IR {100} reconstruction by CO adsorption: An ab initio study"\n
DTSTART;VALUE=DATE-TIME:20061128T100000Z
DTEND;VALUE=DATE-TIME:20061128T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06340@ictp.it
DESCRIPTION:The adsorption of CO  on unreconstructed and reconstructed Ir{
 100} has been studied\, using a combination of  density functional theory 
 and thermodynamics\, to determine the  relative stability of the two phase
 s as a  function of  CO coverage\, temperature  and pressure.  We obtain g
 ood agreement with experimental  data. At zero temperature\, the (1X5) rec
 onstruction  becomes  less stable than the unreconstructed (1X1) surface w
 hen the CO coverage exceeds a critical value of 0.09 ML.  The interaction 
 between CO  molecules is found to be repulsive on the reconstructed surfac
 e\, but attractive on the unreconstructed\, explaining the experimental ob
 servation of high CO coverage on growing (1X1) islands.  At all temperatur
 es and pressures\, we find only two possible stable states:  0.05 ML  CO  
 c(2X2) overlayer  on the (1X1)  substrate\, and the clean (1X5) reconstruc
 ted surface.\n\n//indico.ictp.it/event/a06340/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a06340/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Seminar: "Some open issues pertinent to the pheno
 menon of dynamical scaling of structure factor"
DTSTART;VALUE=DATE-TIME:20061129T150000Z
DTEND;VALUE=DATE-TIME:20061129T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06339@ictp.it
DESCRIPTION:The phenomenon of new phase formation is a representative exam
 ple of first order transition. The phenomenon is fundamental and of immens
 e interest as an example of a highly nonlinear process far from equilibriu
 m. The second phase grows with time and in late stages all domain sizes ar
 e much larger than all microscopic lengths. In the large time limit\, the 
 new phase forming systems exhibit self-similar growth pattern with dilatio
 n symmetry\, with time dependent scale\, and scaling phenomenon. The pheno
 menon is indicative of the emergence of a morphological pattern of the dom
 ains at earlier times looking statistically similar to a pattern at later 
 times apart from the global change of scale implied by the growth of time 
 dependent characteristic length scale L(t) – a measure of the time depen
 dent domain size of the new phase.\nThe scaling hypothesis assumes the exi
 stence of a single characteristic length scale L(t) such that the domain s
 izes and their spatial correlation are time invariant when the lengths are
  scaled by L(t). Quantitatively\, for isotropic systems\, the equal-time s
 patio-temporal composition modulation auto-correlation function g(r\,t)\, 
 reflects the way in which the mean density of the medium varies as a funct
 ion of distance from a given point\, should exhibit the scaling form with 
 time-dependent dilation symmetry g(r\,t)=f(r/L(t)). The scaling function f
 (r/L(t)) is universal in the sense that it is independent of initial condi
 tions and also on interactions as long as they are short ranged. However\,
  form of f(r/L(t)) depends non-trivially on n\, the number of components i
 n the vector order-parameter field exhibiting the scaling behavior\, and d
 \, the dimensionality of the system. It is important to note that the scal
 ing hypothesis has not been proved conclusively except for some model syst
 ems.  Based on some of our recent observations [1-4]\, we propose to reexa
 mine the extent of validity of scaling laws addressing issues like (i) uni
 queness of characteristic length L(t)\; (ii) the extent of validity of the
  scaling laws for new phase formation in the case of non-Euclidean fractal
  systems\; (iii) the extent of validity of the scaling laws for multicompo
 nent systems.\n   \nReferences\n[1] S. Mazumder\, et al.\, Phys. Rev. B 60
  (1999) 822.\n[2] S. Mazumder\, et al.\, Phys. Rev. Lett 93 (2004) 255704.
 \n[3] S. Mazumder\, et al.\, Phys. Rev. B 72 (2005) 224208.\n[4] S. Mazumd
 er\, Physica B\, in press.\n\n//indico.ictp.it/event/a06339/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a06339/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Disorder and strong electron correlations\n"Th
 e emptiness formation probability: Going beyond the Luttinger liquid model
 "\n
DTSTART;VALUE=DATE-TIME:20061130T100000Z
DTEND;VALUE=DATE-TIME:20061130T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06341@ictp.it
DESCRIPTION:The Emptiness Formation Probability (EFP) is a very important 
 correlation function in the theory of integrable models.  In One-Dimension
 \, it measures the probability that a region of length n will present no p
 articles.  For spin chains\, the Jordan-Wigner transformation maps the EFP
  into the Probability of Formation of Ferromagnetic Strings (PFFS)\, i.e. 
 the probability that a string of n spins are all aligned in one direction.
   The configuration measured by the EFP is in general very different from 
 the equilibrium one.  Because of this\, the EFP is an ideal example of a c
 orrelator that cannot be captured by a bosonization approach\, since it re
 quires contributions from the whole spectrum of the system.  In the first 
 part of the talk\,  we will present an alternative (exact) way to calculat
 e the EFP for the anisotropic XY model at zero temperature\, by representi
 ng this correlator as the determinant of a Toeplitz matrix.  Using the lit
 erature on Toeplitz determinants\, we will be able to calculate the asympt
 otic behavior of the EFP in the different regions of the phase diagram of 
 the XY model.  In the second part of the talk\, we will introduce a hydrod
 ynamic description of integrable models at zero temperature\, that will al
 low us to calculate the EFP for simple systems.  This hydrodynamic approac
 h is a collective description of the system that takes naturally into acco
 unt the curvature of the spectrum\, at the cost of dealing with a non-line
 ar theory.  This approach could be used to describe other effects beyond t
 he Luttinger Liquid model\, for instance the higher energy corrections to 
 the exact Spin-Charge separation prediction for low-lying excitations.\n\n
 //indico.ictp.it/event/a06341/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a06341/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar:  "Eigenfunction fractality and pseudogap state n
 ear superconductor-insulator transition"
DTSTART;VALUE=DATE-TIME:20061206T150000Z
DTEND;VALUE=DATE-TIME:20061206T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06347@ictp.it
DESCRIPTION:We develop a theory of a pseudogap state appearing near the su
 perconductor-insulator transition\nin strongly disordered metals with attr
 active interaction. We show that such an interaction\, combined\nwith the 
 fractal nature of the single particle wave functions near the mobility edg
 e\, leads to an\nanomalously large single particle gap in the superconduct
 ing state near SI transition that persists \nand even increases in the ins
 ulating state long after the superconductivity is destroyed. We give\nanal
 ytic expressions for the value of the pseudogap in terms of the inverse pa
 rticipation ratio of the\ncorresponding localization problem.\n\n//indico.
 ictp.it/event/a06347/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a06347/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar on: \n"Phenomenological 
 theory of underdoped state of the cuprates "\n
DTSTART;VALUE=DATE-TIME:20061213T150000Z
DTEND;VALUE=DATE-TIME:20061213T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06352@ictp.it
DESCRIPTION:We model the Fermi surface of the cuprates by 1D nested parts 
 near the antinodal regions and unnested parts near the zone diagonals.  El
 ectrons in the nested regions form 1D spin liquids and develop spectral ga
 ps below some T*\, but superconducting order is prevented by quantum fluct
 uations.  It is shown that Josephson coupling between order parameters for
 med at  antinodes locks their relative phase at a crossover scale T** \n\n
 //indico.ictp.it/event/a06352/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a06352/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Disorder and strong electron correlations\n" E
 lectron fractionalization in two-dimensional graphene-like structures "\n
DTSTART;VALUE=DATE-TIME:20061214T100000Z
DTEND;VALUE=DATE-TIME:20061214T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a06351@ictp.it
DESCRIPTION:Electron fractionalization is intimately related to topology. 
  In one-dimensional systems\, fractionally charged states exist at domain 
 walls between degenerate vaccua.  In two-dimensional systems\, fractionali
 zation exists in quantum Hall fluids\, where time-reversal symmetry is bro
 ken by a large external magnetic field.  Recently\, there has been a treme
 ndous effort in the search for examples of fractionalization in two-dimens
 ional systems with time-reversal symmetry.  In this paper\, we show that f
 ractionally charged topological excitations exist on graphene-like structu
 res\, where quasiparticles are described by two flavors of Dirac fermions 
 and time-reversal symmetry is respected.  The topological zero-modes are m
 athematically similar to fractional vortices in p-wave superconductors.  T
 hey correspond to a twist in the phase in the mass of the Dirac fermions\,
  akin to cosmic strings in particle physics.\n\n//indico.ictp.it/event/a06
 351/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a06351/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Kondo shut
 tling in nanoelectromechanical devices"\n
DTSTART;VALUE=DATE-TIME:20070201T100000Z
DTEND;VALUE=DATE-TIME:20070201T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0717@ictp.it
DESCRIPTION:We investigate theoretically a mechanically assisted Kondo eff
 ect and electric charge shuttling in nanoelectromechanical single-electron
  transistor (NEM-SET)  charged by odd/even number of electrons.  It is sho
 wn that the mechanical motion of mobile quantum impurity with the spin res
 ults in the time dependent tunneling width which leads to effective increa
 se of the Kondo temperature.  The time-dependent oscillating Kondo tempera
 ture changes the scaling behavior of the differential conductance resultin
 g in the suppression of transport in a strong coupling- and its enhancemen
 t in a weak coupling regimes. The conditions for fine-tuning of the Abriko
 sov-Suhl resonance and possible experimental realization of the Kondo shut
 tling in a spin pumping regime are discussed.\n\n//indico.ictp.it/event/a0
 717/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a0717/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Towards an understanding of transport through junctions in quantum
 -Hall systems
DTSTART;VALUE=DATE-TIME:20070208T100000Z
DTEND;VALUE=DATE-TIME:20070208T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0725@ictp.it
DESCRIPTION:Motivated by recent experimental findings (e.g.\, PRL 95\, 156
 804 (2005))\, we study transport in a simple phenomenological model of a q
 uantum Hall edge system with a gate-voltage controlled constriction loweri
 ng the local filling factor. The current backscattered from the constricti
 on is seen to arise from the matching of the properties of the edge-curren
 t excitations in the constriction ν2 and bulk  ν1 regions. We develop a 
 hydrodynamic theory for bosonic edge modes inspired by this model\, findin
 g that a competition between two tunneling process\, related by a quasipar
 ticle-quasihole symmetry\, determines the fate of the low-bias transmissio
 n conductance. In this way\, we find satisfactory explanations for many re
 cent puzzling experimental results.\n\n//indico.ictp.it/event/a0725/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0725/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Cooper inst
 ability near the Anderson transition"
DTSTART;VALUE=DATE-TIME:20070215T100000Z
DTEND;VALUE=DATE-TIME:20070215T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0728@ictp.it
DESCRIPTION:We consider the simplest model of a disordered superconductor 
 in which electron interaction is attractive near the Fermi surface and the
  Coulomb repulsion is absent.  In contrast to classical BCS theory we assu
 me the multifractal statistics of near critical one-particle eigenstates n
 ear the Anderson transition.  Using different approximations for the tempe
 rature of Cooper instability and generating the multifractal states from t
 he corresponding random-matrix ensembles we find this temperature to be dr
 astically increased at the Anderson transition and behaving like a power 1
 /(1-D_2/3)~1.6 of the dimensionless attraction constant.  Here D_2 is the 
 correlation fractal dimension of the single-particle eigenfunction which f
 or the 3D Anderson model is approximately equal to 1.3.  We also study the
  superconducting temperature as a function of the localization-correlation
  length in the vicinity of the Anderson transition and show that the super
 conductivity persists in the Anderson insulator until the level spacing in
  the localization volume becomes of the order of the critical temperature 
 exactly at the transition.\n\n//indico.ictp.it/event/a0728/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a0728/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar on: "Mapping spin struct
 ures on the atomic scale" 
DTSTART;VALUE=DATE-TIME:20070221T150000Z
DTEND;VALUE=DATE-TIME:20070221T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0736@ictp.it
DESCRIPTION:A fundamental understanding of magnetic and spin-dependent phe
 nomena requires the determination of spin structures and spin excitations 
 down to the atomic scale. The direct visualization of atomic-scale spin st
 ructures [1-4] has first been accomplished for magnetic metals by combinin
 g the atomic resolution capability of Scanning Tunnelling Microscopy (STM)
  with spin sensitivity\, based on vacuum tunnelling of spin-polarized elec
 trons [5]. The resulting technique\, Spin-Polarized Scanning Tunnelling Mi
 croscopy (SP-STM)\, nowadays provides unprecedented insight into collinear
  and non-collinear spin structures at surfaces of magnetic nanostructures 
 and has already led to the discovery of new types of magnetic order at the
  nanoscale [6]. More recently\, the detection of spin-dependent exchange a
 nd correlation forces has allowed a first direct real-space observation of
  spin structures at surfaces of antiferromagnetic insulators [7]. This new
  type of scanning probe microscopy\, called Magnetic Exchange Force Micros
 copy (MExFM)\, provides a powerful new tool to investigate different types
  of spin-spin interactions based on direct-\, super-\, or RKKY-type exchan
 ge down to the atomic level. By combining SP-STM with inelastic electron t
 unnelling spectroscopy or by performing MExFM together with high-precision
  measurements of damping forces localized or confined spin excitations in 
 magnetic systems of reduced dimensions now become experimentally accessibl
 e.\n\nReferences\n[1]	R. Wiesendanger\, I. V. Shvets\, D. Bürgler\, G. Ta
 rrach\, H.-J. Güntherodt\, J. M. D. Coey\, and S. Gräser\, Science 255\,
  583 (1992)\; \n	R. Wiesendanger\, I. V. Shvets\, D. Bürgler\, G. Tarrach
 \, G. Güntherodt\, H.-J. Güntherodt\, and J. M. D. Coey\, Europhys. Lett
 . 19\, 141 \n	(1992)\n[2]	S. Heinze\, M. Bode\, O. Pietzsch\, A. Kubetzka\
 , X. Nie\, S. Blügel\, and R. Wiesendanger\, Science 288\, 1805 (2000)\n[
 3] 	A. Kubetzka\, P. Ferriani\, M. Bode\, S. Heinze\, G. Bihlmayer\, K. vo
 n Bergmann\, O. Pietzsch\, S. Blügel\, and R. Wiesendanger\, Phys. Rev. \
 n	Lett. 94\, 087204 (2005) \n[4] M. Bode\, E. Y. Vedmedenko\, K. von Bergm
 ann\, A. Kubetzka\, P. Ferriani\,  S. Heinze\, and R. Wiesendanger\, Natur
 e Materials 5\, 477 (2006)\n[5]	R. Wiesendanger\, H.-J. Güntherodt\, G. G
 üntherordt\, R. J. Gambino\, and R. Ruf\, Phys. Rev. Lett. 65\, 247 (1990
 )\n[6]	 K. von Bergmann\, S. Heinze\, M. Bode\, E. Y. Vedmedenko\, G. Bihl
 mayer\,   S. Blügel\, and R. Wiesendanger\, Phys. Rev. Lett. 96\, 167203 
 \n	(2006)\n[7]   	U. Kaiser\, A. Schwarz\, and R. Wiesendanger\, Nature (2
 007)\, in press\n\n//indico.ictp.it/event/a0736/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0736/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Electron fractionalization in one- and two-dimensional structures
DTSTART;VALUE=DATE-TIME:20070222T100000Z
DTEND;VALUE=DATE-TIME:20070222T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0737@ictp.it
DESCRIPTION://indico.ictp.it/event/a0737/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a0737/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Journal Club Seminar on Disorder and strong electron correlations:
  "Electron fractionalization in one- and \ntwo-dimensional structures" - P
 art II\n
DTSTART;VALUE=DATE-TIME:20070301T100000Z
DTEND;VALUE=DATE-TIME:20070301T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0745@ictp.it
DESCRIPTION://indico.ictp.it/event/a0745/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a0745/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Statistical Physics Seminar: "Off-critical statistical models in t
 wo dimensions"\n
DTSTART;VALUE=DATE-TIME:20070306T113000Z
DTEND;VALUE=DATE-TIME:20070306T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0747@ictp.it
DESCRIPTION:This seminar intends to present the main theoretical ideas beh
 ind the study of the statistical models in two dimensions\,  such as unive
 rsality\, integrability or breaking thereof.   As example\, we will make a
  thorough analysis of the class of universality of the Ising model: in par
 ticular we focus on the universal ratios of the Renormalization Group and 
 on the spectrum of the excitations by varying the temperature or/and the m
 agnetic field.\n\n//indico.ictp.it/event/a0747/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0747/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Multiphoton
  processes in driven mesoscopic systems"\n
DTSTART;VALUE=DATE-TIME:20070308T100000Z
DTEND;VALUE=DATE-TIME:20070308T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0748@ictp.it
DESCRIPTION:In this seminar\, I will describe the dynamics in energy space
  of a mesoscopic system\, specifically a quasi-1d ring threaded by an harm
 onic time-dependent flux  Phi(t)\, focusing on the the statistics of multi
 -photon absorption/emission processes.  For this sake\, I will demonstrate
  a useful mapping of the dynamics of the electrons distribution function i
 nto a Continuous Time Random Walk in energy space. Studying the probabilit
 y to absorb/emit  n  quanta  per scattering event\, we will explore the cr
 ossover between ultra-quantum/low-intensity limit and quasi-classical/high
 -intensity regime\, and the role of multiphoton processes in driving it.  
 Finally\, I will discuss the influence of quantum interference\, and the r
 ole of system geometry in determining its effect.\n\n//indico.ictp.it/even
 t/a0748/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a0748/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and Strong Electron Correlations: "The classic
 al limit of quantum transport"
DTSTART;VALUE=DATE-TIME:20070313T123000Z
DTEND;VALUE=DATE-TIME:20070313T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0750@ictp.it
DESCRIPTION:The interference of multiply scattered quantum mechanical matt
 er waves causes small but noticeable corrections to the conductance of a m
 etal at low temperatures.  Historically\, one separates the interference c
 orrection to the electrical conductance into 'weak localization'\, a small
  negative correction to the conductance averaged over an ensemble of condu
 ctors with different impurity configurations\, and the 'conductance fluctu
 ations'\, the sample-to-sample fluctuations measured with respect to the e
 nsemble average.  What is the fate of quantum interference corrections in 
 the limit that the wavelength of the electrons becomes small in comparison
  to all other relevant length scales?  This limit is a 'classical limit' s
 imilar to the transition from wave optics to ray optics that occurs when t
 he typical size of optical elements becomes much larger than the wavelengt
 h of light.  I'll show that\, whereas the interference correction to the e
 nsemble-averaged conductance (weak localization) disappears in this classi
 cal limit\, the quantum interference contribution to the sample-specific c
 onductance fluctuations remains surprisingly unaffected.\n\n//indico.ictp.
 it/event/a0750/
LOCATION:ICTP - Lecture Room 204 - II floor
URL://indico.ictp.it/event/a0750/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Modelling the evolu
 tion of the influenza virus"\n
DTSTART;VALUE=DATE-TIME:20070314T113000Z
DTEND;VALUE=DATE-TIME:20070314T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0752@ictp.it
DESCRIPTION:The evolution of the virus of influenza A presents paradoxical
  aspects: despite its rapid evolution to escape acquired immunity\, the vi
 ral population remains concentrated with a behavior reminiscent of an evol
 ving quasi-species.  After an introduction to the ecology and the evolutio
 n of Influenza\, I will discuss recent proposals to understand this behavi
 our.\n\n//indico.ictp.it/event/a0752/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0752/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Magnetic ph
 ase diagram of the doped two-dimensional Kondo lattice model"\n
DTSTART;VALUE=DATE-TIME:20070315T100000Z
DTEND;VALUE=DATE-TIME:20070315T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0753@ictp.it
DESCRIPTION:The Kondo lattice model describes an array of magnetic impurit
 ies embed in a metallic host and is believed to capture the physics of hea
 vy fermion systems.  Over the past years it has become possible to carry o
 ut approximation free auxiliary field quantum Monte Carlo simulations of t
 he KLM for the special case of a particle-hole symmetric  conduction band.
   Those results allow an understanding of the interplay between the RKKY i
 nteraction and the Kondo effect which is at the origin of magnetic order-d
 isorder quantum phase transitions in those models.  In the ordered phase\,
  the  numerical results allow the interpretation of the coexistence\, rath
 er than the mutual exclusion\, of magnetic ordering and Kondo screening.  
 The local moments are partially screened and the remnant moment orders mag
 netically.  The limitations of the above simulations lies in the  requirem
 ent of a particle-hole symmetric conduction band and invariably leads to i
 nsulating ground states.  To alleviate this restriction and to access meta
 llic states\,  approximate methods have to be used.  We have opted for the
  dynamical cluster approximation (DCA)  with spin symmetry broken baths so
  as to account for magnetically ordered states.  In the special case of a 
 particle-hole symmetric conduction band the overall features of the DCA re
 sults compare very favorably with  exact auxiliary field simulations.  Wit
 hin the DCA\, the magnetically ordered phase survives finite doping and al
 lows the study of the evolution of the single particle spectral function f
 rom magnetic metallic states to paramagnetic heavy fermion states.\n\n//in
 dico.ictp.it/event/a0753/
LOCATION:ICTP (Main Bldg. Lecture Room 204)
URL://indico.ictp.it/event/a0753/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: 'Statistical mechani
 cs and financial markets'
DTSTART;VALUE=DATE-TIME:20070320T113000Z
DTEND;VALUE=DATE-TIME:20070320T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0757@ictp.it
DESCRIPTION:I will discuss shortly the empirical findings on financial mar
 kets which have attracted the interest of statistical physicists\, the rel
 evant interactions and the approaches which have been advanced to understa
 nd them as critical phenomena. In particular\, I will concentrate on the c
 ollective dynamics of the price of an ensemble of stocks\, review empirica
 l studies and discuss a simple phenomenological model for the dynamics of 
 the center of mass (the so-called market mode)\, which accounts for the im
 pact of optimal portfolio strategies.\n\n//indico.ictp.it/event/a0757/
LOCATION:SISSA - Lecture Room D
URL://indico.ictp.it/event/a0757/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Theory of 2
 D superconductor with broken inversion symmetry"
DTSTART;VALUE=DATE-TIME:20070322T100000Z
DTEND;VALUE=DATE-TIME:20070322T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0758@ictp.it
DESCRIPTION:This seminar presents a theory of a phase diagram of a two-dim
 ensional spin-orbital superconductor in a parallel magnetic field.  A spin
 -orbital interaction of the Rashba type is known to produce at a high magn
 etic field (and in the absence of impurities) an inhomogeneous superconduc
 tive phase similar to the Larkin-Ovchinnikov-Fulde-Ferrel (LOFF)  state.  
 We consider the case of a strong Rashba interaction with the spin-orbital 
 splitting much larger than the superconductive gap\, and show that at low 
 temperatures the LOFF-type state is separated from the usual homogeneous s
 tate by a first-order phase transition line.  At higher temperatures anoth
 er inhomogeneous state\, a new ``helical'' state\,  intervenes between the
  uniform BCS and the LOFF-like state.  The superfluid density vanishes in 
 the region around the second-order transition line between the BCS and the
  "helical'' state.  Non-magnetic impurities suppress both inhomogeneous st
 ates.  However\, once an account is made of the next-order term over the s
 mall ratio Rashba/Fermi velocity\, a relatively long-wave helical modulati
 on develops from the BCS state.  This long-wave modulation is stable with 
 respect to disorder. In addition\, we predict that unusual vortex defects 
 with a continuous core exist near the phase boundary between the helical a
 nd the LOFF-like states.  In particular\, in the LOFF-like state these def
 ects may carry a half-integer flux.\n\n//indico.ictp.it/event/a0758/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a0758/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:"How can supe
 rconductivity emerge out of a pseudo-gap metal: A novel scenario"
DTSTART;VALUE=DATE-TIME:20070329T100000Z
DTEND;VALUE=DATE-TIME:20070329T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0766@ictp.it
DESCRIPTION:Motivated by the physics of cuprates\, many attempts have been
  recently done to understand how high temperature superconductivity may em
 erge out of a pseudo-gap metal.  The puzzle lies in the fact that one shou
 ld naively expect that a pseudo-gap in the normal phase cuts off the singu
 larity of the Cooper channel.  Consequently a very strong pairing mechanis
 m would be required to turn the pseudo-gap metal into a high temperature s
 uperconductor.  A similar scenario\, although in a different context from 
 cuprates\, was recently discovered\, in the framework of the so-called Str
 ongly Correlated Superconductivity (SCS)\, solving by Dynamical Mean Field
  Theory (DMFT) a two-orbital Hubbard model with a Jahn-Teller pairing mech
 anism.  The DMFT phase diagram has revealed a very rich phenomenology wher
 e a superconductor with an huge gap and a large Drude weight comes out of 
 a pseudo-gapped Non Fermi Liquid phase just close to a singlet Mott insula
 tor.  To get a further insight into such an appealing scenario\, we presen
 t in this talk a simple analytical ansatz for the low-energy part of the s
 elf-energy in this model.  Our approach mainly relies on the physical idea
  that symmetry breaking provides the system with a low-energy scale\, iden
 tified with the superconducting gap\, that regularizes all non-Fermi-liqui
 d singularities of the normal phase\, thus restoring well-defined quasipar
 ticles within the superconducting phase.  Within this scenario\, supercond
 uctivity seems to be the natural fate of the pseudo-gap metal at low tempe
 rature\, rather then a competitor.  To check the ansatz we compare our mod
 el self-energy with data coming from DMFT as well as from a closely relate
 d impurity model.  While the former only partially confirm our approach\, 
 mainly due to the limited energy resolution of DMFT data\, the latter stro
 ngly support our scenario.\n\n//indico.ictp.it/event/a0766/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a0766/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on disorder and strong electron correlations: "Caustics\, 
 focusing and Veselago lens in P-N junctions in graphene"\n
DTSTART;VALUE=DATE-TIME:20070402T100000Z
DTEND;VALUE=DATE-TIME:20070402T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0772@ictp.it
DESCRIPTION:There are many similarities between optics and electronics: Ra
 ys in geometrical optics are analogous to classical trajectories of electr
 ons\, while electron de Broglie waves can interfere.  The electron microsc
 ope is one example of the technological implementation of this similarity.
   The analogy with optics may also hold a significant potential for semico
 nductor electronics.  In optics\, transparent interfaces between materials
  are used in lenses and prisms to manipulate light beams.  From this persp
 ective\, an unusual promise is offered by the recently discovered two-dime
 nsional gapless semiconductor\, graphene.  Fine-tuning of the carrier dens
 ity in graphene by means of electrical gates or doping of the underlying s
 ubstrate was demonstrated\, thus\, paving the way towards controllable bal
 listic PNJs.  On the one hand\, the PNJ in graphene is highly transparent 
 for the charge carriers.  On the other\, the transmission of electrons thr
 ough the p-n interface may resemble optical refraction at the surface of m
 etamaterials with negative refractive index: the straight interface is abl
 e to focus electric current whereas a ballistic stripe of p-type graphene 
 separating two n-type regions acts as a lens.  In this talk\, I shall revi
 ew the properties of graphene and p-n junctions in this material leading t
 o the focusing effect\, discuss form of cautics replacing the focus in asy
 mmetric p-n junctions\, and describe the proposal of Veselago lens and foc
 using prism/beam splitter in graphene.\n\nReferences:\nV. Cheianov\, V.I. 
 Fal’ko\, B.L. Altshuler - Science 315\, 1252 (2007)\nV. Cheianov and V.I
 . Fal’ko - Phys. Rev. B 74\, 041403 (2006)\n\n//indico.ictp.it/event/a07
 72/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a0772/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Ellipse of 
 constant entropy in the XY spin chain"
DTSTART;VALUE=DATE-TIME:20070412T100000Z
DTEND;VALUE=DATE-TIME:20070412T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0774@ictp.it
DESCRIPTION:We study the bi-partite entanglement in the ground state of th
 e one-dimensional XY spin 1/2 model\, by calculating the Von Neumann Entro
 py of a block of neighboring spins.  We consider the double-scaling limit 
 in which the block size is much bigger than unity\, but still much smaller
  than the length of the whole chain.  As long as the system is gapped\, as
  the size of the block increases toward infinity\, the entropy reaches a f
 inite saturation value. We study this limit entropy in the two-dimensional
  phase diagram of the system\, as a function of the anisotropy parameter a
 nd of the external magnetic field.  We identify its minima at product stat
 es and its divergences at the quantum phase transitions. We find that the 
 curves of constant entropy are ellipses and hyperbolae and that they all m
 eet at one point (it essential critical point).  The entropy is highly dis
 continuous across this point: depending on the direction of approach to th
 e essential critical point the entropy can take any value on the positive 
 real axis.  In the vicinity of this point small changes in the parameters 
 cause drastic changes of the entropy and this can be really important for 
 quantum control.  Finally\, I will present some more technical results fro
 m a work in progress\, in which a second\, degenerate\, ground state of th
 e model is identified and I'll briefly discuss its meaning and significanc
 e.\n\n//indico.ictp.it/event/a0774/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a0774/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on disorder and strong electron correlations: "Decohering 
 quantum transport: Phase reservoir"\n
DTSTART;VALUE=DATE-TIME:20070419T100000Z
DTEND;VALUE=DATE-TIME:20070419T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0782@ictp.it
DESCRIPTION:A phenomenology of random-phase reservoir will be introduced a
 nd examined in the context of the reservoir-induced decoherence of quantum
  transport in the presence of static disorder.\n\n//indico.ictp.it/event/a
 0782/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a0782/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA statistical physics seminar: "Nonlinear magnetotr
 ansport in chiral interacting nanotubes "\n
DTSTART;VALUE=DATE-TIME:20070424T113000Z
DTEND;VALUE=DATE-TIME:20070424T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0781@ictp.it
DESCRIPTION:Nonlinear transport through interacting single-wall carbon nan
 otubes containing a few impurities is studied theoretically.  Extending th
 e Luttinger liquid theory to incorporate trigonal warping and chirality ef
 fects\, we derive the current contribution odd in an orbital magnetic fiel
 d B\, which is non-zero only for chiral tubes and is a direct manifestatio
 n of interaction physics.\n\n//indico.ictp.it/event/a0781/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0781/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n" Interferen
 ce and correlations in \ntwo-level transport through quantum dots"\n
DTSTART;VALUE=DATE-TIME:20070503T100000Z
DTEND;VALUE=DATE-TIME:20070503T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0793@ictp.it
DESCRIPTION:Two-level quantum dots coupled to two reservoirs with spinless
  electrons with no particular symmetries can be mapped exactly to a genera
 lized spinful single-impurity Anderson model.  We give a general character
 ization of charge occupation numbers and linear conductance in regime inte
 rlevel Coulomb repulsion by employing various analytical techniques develo
 ped for the local moment regime of the Anderson model.  Implications for p
 opulation inversion\, transmission phase lapse and orbital Kondo effect in
  quantum dots are discussed.\n\n//indico.ictp.it/event/a0793/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a0793/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Folding of small pr
 oteins in explicit solvent by the combined use of metadynamics and replica
  exchange"
DTSTART;VALUE=DATE-TIME:20070508T113000Z
DTEND;VALUE=DATE-TIME:20070508T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0795@ictp.it
DESCRIPTION:We recently developed a method that combines replica exchange 
 with metadynamics and allows\, with a moderate computational effort\, the 
 simultaneous reconstruction of the free energy as a function of a large nu
 mber of variables.  This allows simulating very complex reactions\, like p
 rotein folding\, in which the reaction coordinate is totally unknown.  We 
 will discuss applications of the methodology to the folding in explicit so
 lvent of the TRP cage miniprotein and of the advillin headpiece C-terminal
  domain (cHP) and its Pro62Ala mutant. Our calculations allow\,  for these
  small proteins\, the ab initio prediction of the folded state.  For the a
 dvillin headpiece we find that the Pro62Ala mutation does not change the o
 verall stability of the native state but it significantly alters the entro
 pic contribution to the folding free energy. Therefore\,  the mutant is st
 ill folded at room temperature but is characterized by a lower unfolding t
 emperature. This prediction was subsequently validated by NMR and CD exper
 iments.\n\n//indico.ictp.it/event/a0795/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0795/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Real time 
 evolution of quantum many-particle systems: The flow equation approach"
DTSTART;VALUE=DATE-TIME:20070510T100000Z
DTEND;VALUE=DATE-TIME:20070510T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0798@ictp.it
DESCRIPTION:The analytical evaluation of the real time evolution of a quan
 tum many-particle system far out of equilibrium poses a challenging proble
 m.  Without prior knowledge about the long-time behavior\, perturbative ca
 lculations suffer from spurious terms (secular terms)\,  which grow in an 
 uncontrolled way for large times.  The flow equation approach (infinitesim
 al unitary transformation approach) can overcome some of these problems by
  studying the real time evolution of observables in the Heisenberg picture
  in a suitable energy-diagonal basis.  This basis is obtained by an approx
 imate renormalization group- like diagonalization of the Hamiltonian. In t
 his talk I will review the method and show its application to various quan
 tum many-particle problems.\n\n//indico.ictp.it/event/a0798/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a0798/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Thermostats\, entro
 py and chaotic hypothesis"\n
DTSTART;VALUE=DATE-TIME:20070515T113000Z
DTEND;VALUE=DATE-TIME:20070515T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07103@ictp.it
DESCRIPTION:A review of recent results\, theoretical\, numerical and exper
 imental on attempts to a general theory of nonequilibrium statistical mech
 anics. Large fluctuations and fluctuation theorem.\n\n//indico.ictp.it/eve
 nt/a07103/
LOCATION:SISSA Main Bldg. - Lecture Room 'D'
URL://indico.ictp.it/event/a07103/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: 'Boundary field theo
 ry approach to Josephson devices'
DTSTART;VALUE=DATE-TIME:20070522T113000Z
DTEND;VALUE=DATE-TIME:20070522T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07107@ictp.it
DESCRIPTION:I show that some superconducting Josephson devices may be rega
 rded as a condensed matter realization of a two boundary sine Gordon model
 .  Using boundary field theory methods I will compute both the DC Josephso
 n current and the normal component of the current-response of SQUIDs to an
  externally applied voltage.  The approach helps in establishing new and s
 omewhat unexpected connections between superconducting devices and quantum
  impurity problems.\n\n//indico.ictp.it/event/a07107/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07107/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "DNA interaction\, reco
 gnition and aggregation.  Love at first sight"
DTSTART;VALUE=DATE-TIME:20070523T150000Z
DTEND;VALUE=DATE-TIME:20070523T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07114@ictp.it
DESCRIPTION:How can meters of genetic material be packed in mammalian sper
 m and phage heads?  Why do some ions condense DNA\, while others do not?  
 Why does DNA change its structure in dense aggregates?  These and other qu
 estions\, including a mechanism for snap-shot genegene recognition in reco
 mbination of homologous genes suggested by Kornyshev and Leikin are addres
 sed within an ongoing research program of a ‘transatlantic’ team at th
 e Departments of Chemistry and Molecular Biosciences of Imperial College L
 ondon\, and the Physical Biochemistry Group of the Institute of Child Heal
 th and Human Development of the National Institute of Health (Bethesda\, M
 D\, USA).  This project is based on Kornyshev-Leikin theory of interaction
  of helical macromolecules in solutions. In line with a wealth of experime
 ntal data (such as the observed poly- and meso-morphism of DNA assemblies\
 , and the measured decay range of repulsive forces between various helical
  macromolecules) this theory was recently extended to the statistical mech
 anics of DNA columnar and cholesteric phases\, and DNA mechanics - mapped 
 on forefront models of nonlinear physics (A. Cherstvy\, A. Kornyshev\, D.J
 . Lee\, S. Leikin\, A. Wynveen).  One of the recent results was the experi
 mental proof of azimuthal correlations between DNA in hydrated aggregates 
 (A.A. Kornyshev\, D.J. Lee\, S. Leikin\, A. Wynveen\, S. Zimmerman)\, pred
 icted by the theory. The latest experiments of Imperial-NIH team (G. Baldw
 in\, N. Brooks\, A. Goldar\, S. Leikin\, R. Robson\, J. Seddon) has recent
 ly approved existence of the physical mechanism of homology recognition in
  protein free environment\, predicted by KL in 2001. The effect of homolog
 y recognition is what presumably warrants against errors in homologous rec
 ombination of genes – the process responsible for evolution and genetic 
 diversity\, as well DNA repair. Thus understanding the recognition mechani
 sm may result in the future in understanding how to avoid such errors that
  themselves are responsible for a number of genetically determined disease
 s\, such as cancer and Atzheimer’s on one hand\, or aging on the other h
 and.\nThis talk will introduce the audience to the principles of the theor
 y\, present some of its main results\, and review the latest experimental 
 findings.  An interested listener is referred to a detailed article which 
 will be published in the June issue of Reviews of Modern Physics: A.A. Kor
 nyshev\, D.J. Lee\, S. Leikin\, and A. Wynveen: Structure and interactions
  of biological helices\, and the original publications\, listed below.\n\n
 \nTheory of interaction between helical molecules\nA.A.Kornyshev and S.Lei
 kin\, J.Chem.Phys. 1997\,107\, 3656.\n\nSymmetry laws for interaction betw
 een helical macromolecules.\nA.A.Kornyshev and S.Leikin\, Biophys.J.\, 199
 8\, 75\, 2513.\n\nHelical symmetry and electrostatic interaction of macrom
 olecules in dense aggregates. An impetus for DNA poly- and meso-morphism.\
 nA.A.Kornyshev and S.Leikin\, Proc.Natl.Acad.Sci.USA. 1998\, 95\, 13579.\n
 \nElectrostatic zipper motif for DNA aggregation.\nA.A.Kornyshev and S.Lei
 kin\, Phys.Rev.Lett.\, 1999\, 82\, 4138.\n\nA twist in chiral interaction 
 between biological helices.\nA.A.Kornyshev and S.Leikin\, Phys.Rev.Lett. 2
 000\, 84\, 2537.\n\nElectrostatic interaction between long\, rigid helical
  macromolecules at all interaxial angles\nA.A.Kornyshev and S.Leikin\, Phy
 s.Rev.E\, 2000\, 62\, 2576.\n\nSequence recognition in pairing of DNA dupl
 exes.\nA.A.Kornyshev and S.Leikin\, Phys.Rev.Lett. 2001\, 86\, 3666. DNA n
 eed not unzip.-\nhttp://focus.aps.org/v7/st19.html\n\nChiral electrostatic
  interactions and cholesteric liquid crystals of DNA.\nA.A.Kornyshev\, S.L
 eikin\, and S.Malinin\, European Phys.J. E (Soft Matter) 2002\, 7\, 83.\n\
 nPhase behavior of columnar DNA assemblies.\nH.M.Harreis\, A.A.Kornyshev\,
  C.N.Likos\, H.Loewen\, and G.Sutmann\, Phys.Rev.Lett. 2002\, 89\, art.#18
 303.\n\nTemperature-dependent DNA condensation triggered by rearrangement 
 of adsorbed cations.\nA.G. Cherstvy\, A.A.Kornyshev\, S.Leikin\, J.Phys.Ch
 em.2002\,106\, 13362.\n\nTorsional Deformation of Double Helix in Interact
 ion and aggregation of DNA.\nA.G.Cherstvy\, A.A.Kornyshev\, and S.Leikin\,
  J.Phys.Chem.B\, 2004\, 108\, 6508.\n\nNonlinear effects in torsional adju
 stment of interacting DNA.\nA.Kornyshev and A.Wynveen\,. Phys.Rev.E\, 2004
 \, 69\, #041905\, 1-14.\n\nDNA-DNA interaction beyond the ground state.\nD
 .J.Lee\, A.Wynveen\, and A.A.Kornyshev\, Phys. Rev. E\, 2004\, 70\, #05191
 3\, 1-12\n\nStatistical mechanics of DNA assemblies.\nA.Wynveen\, D.J.Lee\
 , and A.A.Kornyshev\, Eur.Phys.J. E\, 2005\, 16\, 303.\n\nTorsional fluctu
 ations in columnar DNA assemblies.\nD.J.Lee and A.Wynveen\, J.Phys: Conden
 sed Matter\, 18\, 786 (2006).\n\nDNA melting in aggregates: impeded or fac
 ilitated?\nA.G.Cherstvy and A.A.Kornyshev\, J.Phys.Chem.B\, 2004\, 108\, 6
 508.\n\nDirect observation of azimuthal correlations between DNA in hydrat
 ed aggregates\nA.A.Kornyshev\, D.J.Lee\, S.Leikin\, A.Wynveen\, S.Zimmerma
 n\, Phys.Rev.Lett. 2005\, 95\,#148102.\n\n//indico.ictp.it/event/a07114/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07114/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Mesoscopic 
 to universal crossover of transmission phase of multi-level quantum dots"\
 n
DTSTART;VALUE=DATE-TIME:20070524T150000Z
DTEND;VALUE=DATE-TIME:20070524T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07108@ictp.it
DESCRIPTION:Transmission phase measurements of many-electron quantum dots 
  (small mean level spacing \\delta) revealed universal phase lapses by \\p
 i between consecutive resonances.  In contrast\, for dots with only a few 
 electrons (large \\delta) the appearance or not of a phase lapse depends o
 n the dot parameters.  We show that a model of a multi-level quantum dot w
 ith local Coulomb correlations and arbitrary level-lead couplings reproduc
 es the generic features of the observed behavior.  The universal behavior 
 at small follows from Fano-type antiresonances of pairs of renormalized si
 ngle-particle levels.\n\n//indico.ictp.it/event/a07108/
LOCATION:ICTP Main Building Lecture Room D
URL://indico.ictp.it/event/a07108/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on  Disorder and strong electron correlations: "New develo
 pments in quantum chaos"\n
DTSTART;VALUE=DATE-TIME:20070529T150000Z
DTEND;VALUE=DATE-TIME:20070529T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07116@ictp.it
DESCRIPTION:The last few years have witnessed drastic advances in the fiel
 d of quantum chaos: building on a fundamentally new understanding of quant
 um interference\, novel analytic approaches to quantitatively describe mes
 oscopic phenomena in chaotic systems (similar in nature to the impurity di
 agram techniques of disordered systems) have been developed.  These new th
 eoretical potentials have made it possible to finally explain the basis of
  universality - i.e. the phenomenon that the spectra of individual chaotic
  systems behave according to the phenomenological predictions of random ma
 trix theory.  They have also been applied to successfully address a spectr
 um of mesoscopic fluctuation phenomena\,  both in thermodynamics and trans
 port.  All in all\, the theory of mesoscopic fluctuations in /individual /
 chaotic systems finally seems to have leveled with the previously much hig
 her developed theory of disordered electronic systems.  In this talk I wil
 l give an overview of the most important recent developments. Some emphasi
 s will be put on elucidating parallels between the different approaches to
  the problem\, notably between periodic orbit theory and quantum field the
 ory.\n\n//indico.ictp.it/event/a07116/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a07116/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Luttinger 
 liquids with curvature: Density correlations and Coulomb drag effect"\n
DTSTART;VALUE=DATE-TIME:20070531T100000Z
DTEND;VALUE=DATE-TIME:20070531T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07118@ictp.it
DESCRIPTION:I discuss the effect of the curvature in fermionic dispersion 
 on the observable properties of Luttinger liquid (LL).  In the bosonizatio
 n technique the curvature is irrelevant perturbation\,  describing the dec
 ay of LL bosons (plasmon modes).  When possible\, I show the correspondenc
 e between the bosonization and the fermionic approach.  The most important
  application of this approach is the analysis of the Coulomb drag by small
  momentum transfer between two LL\, which is only possible due to curvatur
 e.  Analyzing the a.c. transconductivity in the one-dimensional drag setup
 \,  I confirm the results by Pustilnik {\\em et al.} for $T-$dependence of
  drag resistivity\,  $R_{12} \\sim T^2$ at high and $R_{12} \\sim T^5$ at 
 low temperatures.  The bosonization allows for treating both intra- and in
 ter-wire electron-electron interactions in all orders\, and I calculate th
 e exact prefactors in low-T drag regime.  The crossover temperature betwee
 n the two regimes is $T_1 \\sim E_F \\Delta$\, with $\\Delta$ relative dif
 ference in plasmon velocities. I show that $\\Delta \\neq 0$ even for iden
 tical wires\, due to lifting of plasmon degeneracy by interwire interactio
 n\, $U_{12}$\, leading to crossover from $R_{12} \\sim U_{12}^2 T^2$ to $R
 _{12} \\sim T^5/U_{12}$ at $T \\sim\n\n//indico.ictp.it/event/a07118/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07118/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Entanglement genera
 tion by a noisy environment"\n
DTSTART;VALUE=DATE-TIME:20070605T113000Z
DTEND;VALUE=DATE-TIME:20070605T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07121@ictp.it
DESCRIPTION:We shall discuss bipartite entanglement generation of purely d
 issipative origin in open systems immersed in a common environment.  The s
 hort and long time entangling power of the environment will be examined to
 gether with its control through phenomenological parameters.\n\n//indico.i
 ctp.it/event/a07121/
LOCATION:SISSA - Lecture Room 'D'
URL://indico.ictp.it/event/a07121/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Quantized turbulenc
 e"
DTSTART;VALUE=DATE-TIME:20070612T113000Z
DTEND;VALUE=DATE-TIME:20070612T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07129@ictp.it
DESCRIPTION:We discuss recent results on visualizing quantized vortices us
 ing tiny particles of solid hydrogen and discuss phenomena such as vortex 
 reconnection.\n\n//indico.ictp.it/event/a07129/
LOCATION:SISSA Main Bldg - Lecture Room 'D'
URL://indico.ictp.it/event/a07129/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: "What is new in the rea
 lm of quantum electronic transport in mesoscopic physics?"
DTSTART;VALUE=DATE-TIME:20070613T150000Z
DTEND;VALUE=DATE-TIME:20070613T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07128@ictp.it
DESCRIPTION:The prime signature of transport in quantum wires and quantum 
 point contacts\, namely the quantisation of conductance into 'Landauer ste
 ps' in units of 2e^2/h\, appears to be adequately explained in terms of co
 herent transmission of electron waves through a loss free barrier.  Howeve
 r\, the picture of quantum coherent scattering at this phenomenological le
 vel can not address the central issue of metallic conduction: what causes 
 dissipation in a ballistic quasi-one dimensional wire.  \nIn this talk I s
 hall present answer to this vexed question by many-body quantum kinetics\,
  totally free of unwanted phenomenologies.  Our microscopic application of
  well-tested many-body methods leads not only to conductance quantisation 
 by precise accounting for inelastic energy loss\,  but we also resolve a l
 ong standing experimental enigma in the fluctuation spectra of a quantum p
 oint contact.  I shall also highlight some recent controversy regarding ne
 gative resistance in three- and four-terminal devices.\nThe talk will be p
 resented at a pedagogic level.\n\n//indico.ictp.it/event/a07128/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07128/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CONDENSED MATTER SECTION-INFORMAL SEMINAR:"Anomalous c-axis transp
 ort in layered metals" \n
DTSTART;VALUE=DATE-TIME:20070615T100000Z
DTEND;VALUE=DATE-TIME:20070615T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07132@ictp.it
DESCRIPTION:Transport in many layered materials (cuprates\, perovskites\,g
 raphite\, etc.) shows an interesting anomaly: whereas the temperature depe
 ndence of the in-plane resistivity is metallic\, that of the out-of-plane 
 (c-axis) resistivity is insulating or even non-monotonic. We show that the
  band transport in all directions\, described by the standard Boltzmann eq
 uation\, is robust with respect to both elastic and inelastic scattering a
 s long as E_F\\tau>>1. A model of phonon-assisted tunneling via resonant s
 tates located in between the layers is suggested to explain a non-monotoni
 c temperature dependence of the c-axis resistivity observed in experiments
 .\n\n//indico.ictp.it/event/a07132/
LOCATION:ICTP-Main Building-Seminar Room
URL://indico.ictp.it/event/a07132/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA CONDENSED MATTER SEMINAR:"Cultural hitchhiking on
  the wave of advance of beneficial technologies"
DTSTART;VALUE=DATE-TIME:20070620T150000Z
DTEND;VALUE=DATE-TIME:20070620T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07133@ictp.it
DESCRIPTION:The wave-of-advance model was introduced to describe the sprea
 d of advantageous genes in a population. It can be adapted to model the up
 take of any advantageous technology through a population\, such as the arr
 ival of neolithic farmers in Europe\, the domestication of the horse\, the
  wheel\, iron tools\, political organisation or advanced weaponry. Any tra
 it which preexists alongside the advantageous one could be carried along w
 ith it\, such as genetics or language\, regardless of any intrinsic superi
 ority. Decoupling of the advantageous trait from other “hitchhiking” t
 raits depends on its adoption by the preexisting population. I shall descr
 ibe work done by Ackland\, Signitzer\, Stratford and myself in which we co
 nstructed a wave-of-advance model for agriculture based on food production
  on a heterogeneous landscape with interaction of multiple populations.  T
 wo key results arise from geographic inhomogeneity: the “subsistence bou
 ndary” at land so poor that the wave of advance is halted\, and the temp
 orary “diffusion boundary” where the wave cannot move into poorer area
 s until its gradient becomes sufficiently large. At diffusion boundaries\,
  farming technology may pass to indigenous people already in those poorer 
 lands\, allowing their population to grow and resist encroachment by farme
 rs. Ultimately\, this leads to the halt in spread of the “hitchhiking”
  trait and establishment of a permanent “cultural boundary” between di
 stinct cultures with equivalent technology.  These phenomena are illustrat
 ed by simulations of the transition between hunting and gathering and neol
 ithic agriculture in Europe and in the Indian subcontinent and by the adva
 nce of European agriculture into Southern Africa much later.  Physical con
 cepts underlie the construction of the model--diffusion\, mobility\, and a
 n Einstein relation between them\; nonlinear wave propagation in an inhomo
 geneous medium\; relaxation processes.  The work provides an example of th
 e power of physical reasoning in an interdisciplinary context.\n\n//indico
 .ictp.it/event/a07133/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07133/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Physics Associates’ Meeting: "Effective Mean-Fi
 eld Theory for Heisenberg Zigzag Ladder"
DTSTART;VALUE=DATE-TIME:20070621T150000Z
DTEND;VALUE=DATE-TIME:20070621T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07135@ictp.it
DESCRIPTION://indico.ictp.it/event/a07135/
LOCATION:ICTP-Lecture room D-MB-Terrace level
URL://indico.ictp.it/event/a07135/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Finite size-effects
  of the supersymmetric Sine-Gordon model with Dirichlet boundary condition
 s"\n
DTSTART;VALUE=DATE-TIME:20070626T113000Z
DTEND;VALUE=DATE-TIME:20070626T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07199@ictp.it
DESCRIPTION:Starting from the Bethe Ansatz solution of the open integrable
  spin-1 XXZ quantum spin chain with diagonal boundary terms\, we derive a 
 set of nonlinear integral equations (NLIEs)\, which we propose to describe
  the boundary supersymmetric sine- Gordon model BSSG+ with Dirichlet bound
 ary conditions on a finite interval. We compute the corresponding boundary
  S matrix. We also derive a relation between the (UV) parameters in the bo
 undary conditions and the (IR) parameters in the boundary S matrix. By com
 puting the boundary vacuum energy\, we determine a previously unknown para
 meter in the scattering theory. We solve the NLIEs numerically for interme
 diate values of the interval length\, and find agreement with our analytic
 al result for the effective central charge in the UV limit and with bounda
 ry conformal perturbation theory.\n\n//indico.ictp.it/event/a07199/
LOCATION:Lecture Room 'D'-SISSA Main Building
URL://indico.ictp.it/event/a07199/
END:VEVENT
BEGIN:VEVENT
SUMMARY:INFORMAL SEMINAR  on  Statistical Physics: " Evolutionary constrai
 nts in metabolic and genetic networks "
DTSTART;VALUE=DATE-TIME:20070628T150000Z
DTEND;VALUE=DATE-TIME:20070628T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07203@ictp.it
DESCRIPTION:Cellular metabolism consists of a complex network of chemical 
 reactions\, which transform hundreds of small molecules into each other in
  order to secure a reliable supply of energy and building blocks. Understa
 nding how cells manage their resources and network flows under different e
 nvironmental conditions is a key question in systems biology. In addition 
 to being relevant for practical applications\, such as the identification 
 of key genes involved in metabolic diseases\, or the design of bioprocesse
 s for optimal production of biofuels\, this question is tightly related to
  the broader problem of how biological networks evolve through natural sel
 ection. By implementing steady state models of genome-scale metabolic netw
 orks and studying the response to single and double gene deletions in micr
 obial cells\, we formulate new hypotheses about the capacity of cells to r
 each optimal states\, and uncover a global organization of genes and pathw
 ays into hierarchical modules associated with different biological functio
 ns.\n\n//indico.ictp.it/event/a07203/
LOCATION:ICTP Main Building Lecture Room D
URL://indico.ictp.it/event/a07203/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Physics Associates’ Meeting:" An exact solvable
  model exhibiting negative specific heat "\n\n
DTSTART;VALUE=DATE-TIME:20070712T150000Z
DTEND;VALUE=DATE-TIME:20070712T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07213@ictp.it
DESCRIPTION:The successful observation of negative specific in nanocluster
 s triggers hot theoretical explorations as to how applying statistical mec
 hanics to finite-sized systems. In this talk\, we will use a simple model\
 , free particles in the well\, to show the existence the negative heat cap
 acity for a system with a finite number of particles.\n\n//indico.ictp.it/
 event/a07213/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a07213/
END:VEVENT
BEGIN:VEVENT
SUMMARY:INFORMAL SEMINAR  on  Statistical Physics: " Orientational orderin
 g of hard  long rods on a lattice "\n\n
DTSTART;VALUE=DATE-TIME:20070718T100000Z
DTEND;VALUE=DATE-TIME:20070718T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07214@ictp.it
DESCRIPTION:The study of systems hard rods has a long history. In 1949\, O
 nsager argued that a system of hard rod-like molecules in solution with on
 ly excluded volume interaction would show long-range orientational order f
 or high solvent densities. The existence of an orientationally ordered pha
 se in the case of lattice models of straight hard rods of length k has rem
 ained controversial so far. Only the case k=2 is analytically soluble. \nW
 e argue that a system of straight rigid rods of length k on square lattice
  with only hard-core interactions shows two phase transitions as a functio
 n of density ρ for k ≥ 7. There is a phase transition from the low-dens
 ity disordered phase to a nematic phase as ρ is increased from 0 at ρ = 
 ρc1\, and there is a second phase transition from the nematic phase to a 
 disordered phase at ρ = ρc2 \n\n//indico.ictp.it/event/a07214/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07214/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Seminar: "New paradigm for spin response in a two
 -dimensional electron liquid with Rashba spin-orbit coupling" \n
DTSTART;VALUE=DATE-TIME:20070718T150000Z
DTEND;VALUE=DATE-TIME:20070718T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07218@ictp.it
DESCRIPTION://indico.ictp.it/event/a07218/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07218/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Condensed Matter Seminar: "Bound states and phase separat
 ion \nin a t-J model"\n
DTSTART;VALUE=DATE-TIME:20070719T100000Z
DTEND;VALUE=DATE-TIME:20070719T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07217@ictp.it
DESCRIPTION:In this talk I shall present the low density phase diagram for
  a t - J model on two dimensional square and honeycomb lattices.  The phas
 e diagram as a function of the exchange interaction\, J\, in both systems 
 possesses three distinct phases\, viz. a gas of free electrons\, (ii) a ga
 s of pairs and finally (iii) a fully phase separated state.  Further\, it 
 is rigorously proven that the phase boundary for the first phase (gas of e
 lectrons) remains same in both the lattice geometries considered here (mor
 e generally it is shown to be true for all bipartite lattices and is indep
 endent of dimensionality of the system)\, while for the latter phases\, th
 e boundaries are somewhat different. Moreover\, the existence of bigger cl
 usters (bound states of three and four electrons etc.) are carefully inves
 tigated using exact diagonalization (ED) and variational studies and possi
 bility for them to occur in the phase diagram is ruled out.  Implications 
 of such studies to superconductivity are discussed.\n\n//indico.ictp.it/ev
 ent/a07217/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a07217/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Physics Associates' Meeting: " Variational approa
 ch to hydrodynamics of superfluid systems "
DTSTART;VALUE=DATE-TIME:20070719T150000Z
DTEND;VALUE=DATE-TIME:20070719T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07219@ictp.it
DESCRIPTION:We study the variational approach to hydrodynamics of superflu
 id systems.  We construct an effective Lagrangian describing the non-dissi
 pative hydrodynamics of a more general system that is a supersolid phase. 
  The Hamilton equations of motion are obtained from the principle of stati
 onary action.  The closed algebra of Poisson brackets is also found.  The 
 Hamilton equations of motion in the leading approximation with respect to 
 spatial gradients of local thermodynamic variables result in hydrodynamic 
 equations.  It is shown that hydrodynamic equations coincide with the supe
 rsolid Andreev-Livshitz hydrodynamics (non-dissipative) if to impose the c
 onstraint on thermodynamic potential associated with Galilean invariance. 
  An effective Lagrangian also describes the ordinary superfluid hydrodynam
 ics.\n\n//indico.ictp.it/event/a07219/
LOCATION:ICTP - Main Bldg. Lecture Rrom 'B'
URL://indico.ictp.it/event/a07219/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: " Theory of supersolid 
 phenomena "
DTSTART;VALUE=DATE-TIME:20070725T150000Z
DTEND;VALUE=DATE-TIME:20070725T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07222@ictp.it
DESCRIPTION:Quantum fluctuations in Solid He 4 leads to a variety of inter
 esting phenomena.  One such possibility is a supersolid phase\, where a fr
 agile superfluidity survives in the crystalline state. Recent experimental
  observations of non classical moment of inertia by Kim and Chan claim to 
 confirm this exotic phase.  After giving a background I will review my rec
 ent theory [1] of the supersolid phenomena.  In my theory\, quantized vort
 ices play a fundamental role. Quantized vortices in He4 have a very small 
 core energy and core size (about 1 Au). Quantized vortex loops are also pr
 esent in the superfluid\, as quantum fluctuations. Pressure beyond 25 atmo
 sphere generates a spontaneous vortex-antivortex lattice\, also self consi
 stently develops an atom density wave with hcp symmetry.  Supersolid He4 i
 s a vortex solid.  Many of the existing phenomenology gets explained and s
 ome interesting predictions are made.\n\n[1] And quiet flows the supersoli
 d\, G. Baskaran\, cond-mat/0505160\n\n//indico.ictp.it/event/a07222/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07222/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Physics Associates' Meeting: "Metal-insulator tra
 nsition and maximum in magnetic susceptibility in 2D electron gas "\n
DTSTART;VALUE=DATE-TIME:20070726T150000Z
DTEND;VALUE=DATE-TIME:20070726T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07221@ictp.it
DESCRIPTION:In this talk we will discuss the experimental observations on 
 the metal-insulator transition (MIT) in the 2D electron gas (2DEG)  and th
 e thermodynamic measurements of the magnetic susceptibility and inverse co
 mpressibility of this system.   Next\, our model based on density function
 al theory will be introduced\, in which disorder and interactions are trea
 ted on the same footing without any assumption on their relative strength.
    Obtained results on thermodynamic quantities and their relationship wit
 h the MIT will be discussed based on our ensemble averaged DFT-based calcu
 lations on this system.\n\n//indico.ictp.it/event/a07221/
LOCATION:ICTP - Lecture Room B
URL://indico.ictp.it/event/a07221/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Section Informal Seminar: "Quantum critical regio
 n of the disorder-driven superconductor-insulator transition"
DTSTART;VALUE=DATE-TIME:20070726T100000Z
DTEND;VALUE=DATE-TIME:20070726T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07223@ictp.it
DESCRIPTION:I present results of the experimental study of the low-tempera
 ture transport properties of disordered thin TiN superconducting films acr
 oss the localization threshold.  The films exhibit an extremely sharp sepa
 ration between the well-defined superconducting- and insulating phases\, d
 emonstrating thus unambiguously the direct disorder-driven superconductor-
 insulator transition.  Although the films choose unequivocally between the
  either superconducting or insulating ground states\, the temperature- and
  magnetic-field behaviors of the resistance reveal an insulating trend in 
 the superconducting films and a superconducting trend in the insulating fi
 lms.  At zero and low magnetic fields the conductivity of insulating films
  is thermally activated\, with the activation energy being nonmonotonic an
 d magnetic-field dependent.  In all samples\, including insulating films\,
  magnetoresistance varies non-monotonously with the magnetic field\, start
 ing with the positive magnetoresistance at low fields\, then reaching the 
 maximum\, followed first by the rapid drop and the eventual saturation at 
 higher magnetic fields.  At these high fields the difference between the i
 nsulating and superconducting samples vanishes and all curves converge to 
 the resistance close to the quantum value.  At very low temperatures a sha
 rp depinning voltage threshold in conductivity is observed.  Our results a
 nd the comparison with other studies on InOx clearly indicate that\, in th
 e vicinity of the disorder-driven superconductor-insulator transition\, th
 e response to the applied magnetic and/or electric fields\, is the same ir
 respectively to whether the underlying ground state is superconducting or 
 insulating.   The observed similarity allows for conjecture that in the cr
 itical region of the transition a peculiar highly inhomogeneous "supercond
 ucting insulator" forms.  This inhomogeneity may be considered as self-ind
 uced granularity\, coming from the strong mesoscopic fluctuations in disor
 dered thin superconducting films and/or the fractal character of the elect
 ronic wave functions near the localization threshold.\n\n//indico.ictp.it/
 event/a07223/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a07223/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Statistical Physics: "Fluctuations\, pauses an
 d backtracking in DNA transcription "\n
DTSTART;VALUE=DATE-TIME:20070820T160000Z
DTEND;VALUE=DATE-TIME:20070820T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07230@ictp.it
DESCRIPTION:Transcription is a vital stage in the process of gene expressi
 on and a major contributor to fluctuations in gene expression levels for w
 hich it is typically modelled as a single step process with Poisson statis
 tics.  However\, recent single molecule experiments raise questions about 
 the validity of such a simple single step picture.  We present a molecular
  multi-step model of transcription elongation that demonstrates that trans
 cription times are in general non-Poisson distributed.  In particular\, we
  model transcriptional pauses due to backtracking of the RNA polymerase as
  a first passage process.  By including such pauses\, we obtain a broad\, 
 heavy-tailed distribution of transcription elongation times.  When transcr
 iptional pauses result in long transcription times\,  we demonstrate that 
 this naturally leads to bursts of mRNA production and non-Poisson statisti
 cs of mRNA levels.  These results suggest that transcriptional pauses may 
 be a significant contributor to the variability in transcription rates wit
 h direct implications for noise in cellular processes as well as variabili
 ty between cells.\n\n//indico.ictp.it/event/a07230/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07230/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Informal seminar: "Nanomagnetism and spin depende
 nt transport through diluted magnetic quantum dots"
DTSTART;VALUE=DATE-TIME:20070911T100000Z
DTEND;VALUE=DATE-TIME:20070911T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07243@ictp.it
DESCRIPTION:Meticulous control of the coupling between spins is essential 
 to the use of magnetic nanostructures in spintronics and quantum informati
 on devices.   Such spin coupling has been studied in bulk ferromagnets\, t
 hin films\,  clusters\, nanotubes\, one dimensional monatomic metal chains
 .  With the development of lithography and scanning tunneling microscope (
 STM)  techniques\, magnetic manipulations can even be realized in quantum 
 dots  (QDs)\, single atoms and molecules. In this talk\, I will present a 
 theory of magnetic exchange interactions and carrier mediated spin-spin in
 teraction between Mn2+ ions in quantum dots containing electrons and magne
 tic ions.  We find the interaction between the electron and Mn ion to depe
 nd strongly on the number of electrons.  It can be switched off for closed
  shell configurations and maximized for partially filled shells.  The Mn-M
 n interaction also depends strongly on the number of electrons.  For close
 d electronic shells we derive the effective RKKY interaction.  For partial
 ly filled shells\, finite electron spin polarizes Mn2+ ions via many-elect
 ron magneto-polaron effect\, leading to effective carrier mediated ferroma
 gnetic spin-spin interactions.  We also explore the possibility of tailori
 ng magnetism by controlling the confining potential\,  particle numbers\, 
 temperature\, and strength of the Coulomb interactions.   It is found that
  the interplay of strong Coulomb interactions and quantum confinement lead
 s to enhanced inhomogeneous magnetization which persists at higher tempera
 tures than in the noninteracting case.  The temperature of the onset of ma
 gnetization can be controlled by changing the number of particles as well 
 as by modifying the quantum confinement and the strength of the Coulomb in
 teractions.  Finally\, I will show how these remarkably magnetic propertie
 s are manifested in the electrical behavior of a single electron transisto
 r.\n\n//indico.ictp.it/event/a07243/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a07243/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "SOC: Recent experimental
  and theoretical developments"\n
DTSTART;VALUE=DATE-TIME:20070914T100000Z
DTEND;VALUE=DATE-TIME:20070914T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07244@ictp.it
DESCRIPTION:In this talk I will review the state of the art on Self-organi
 zed  criticality (SOC).  First I will discuss some experiments on material
  science  and on neuro-science\, and then proceed to report on recent deve
 lopments on  the understanding of  SOC as a phase transitions\, discussing
  different  viewpoints.\n\n//indico.ictp.it/event/a07244/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07244/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Decoherence
  and dephasing in quantum dots with SO(5) dynamical symmetry"\n
DTSTART;VALUE=DATE-TIME:20070920T100000Z
DTEND;VALUE=DATE-TIME:20070920T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07251@ictp.it
DESCRIPTION:Complex quantum dots are characterized by non-trivial dynamica
 l symmetries SU(n)(in case of odd electron occupation) or SO(n) (in case o
 f even occupation).  These symmetries are activated due to interaction wit
 h environment\, i.e. metallic electrons in source and drain leads\, and du
 e to influence of external electrical and magnetic field.   \n	Incoherent 
 charge input signal applied to double quantum dot may be transformed into 
 incoherent response in Kondo-type tunnel conductance\, and the transformat
 ion mechanism is intimately connected with gauge fluctuations because of t
 ime-dependent violation of SO(5) symmetry.  The difference between dephasi
 ng and decoherence processes induced by external noise will be demonstrate
 d explicitly.\n\n//indico.ictp.it/event/a07251/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07251/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on chemical physics: "Challenging the energy prob
 lem by molecular simulations"\n\n
DTSTART;VALUE=DATE-TIME:20070925T100000Z
DTEND;VALUE=DATE-TIME:20070925T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07253@ictp.it
DESCRIPTION:The necessity to satisfy environmentally friendly the demand o
 f energy in the World has lead to increasing interest in the use of renewa
 ble and clean sources of energy.  At the same time\, new sources and metho
 dologies are needed to explore alternative fossil fuels (methane hydrates 
 and heavy oil). By using a combination of Ab initio calculations and class
 ical molecular dynamics\, we have challenged the energy problem in several
  directions.  Firstly\, we have investigated the thermodynamics and kineti
 cs of ammonia-borane (BH3NH3)*\, a promising hydrogen storage material.  I
 n the same line\, a study of nanoparticles of Pt* has been performed by fi
 rst principles calculations to understand the size and finite surface stru
 cture of chemisorption of O and OH groups for Fuel Cell applications.   Al
 ternatively\, we calculate the mobility and insertion potential of Li in i
 norganic nanotubes as a possible electrode material in batteries*.  Finall
 y\, the thermodynamic and elastic properties of methane hydrates have been
  investigated under the realistic thermodynamic conditions of hydrate rese
 rvoirs.  All together\, these examples show the importance and versatility
  of molecular simulations to challenge the energy problem.\n\n//indico.ict
 p.it/event/a07253/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07253/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Criticality
  in dimerized spin chains"
DTSTART;VALUE=DATE-TIME:20070927T100000Z
DTEND;VALUE=DATE-TIME:20070927T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07255@ictp.it
DESCRIPTION:Antiferromagnetic Heisenberg spin chains with alternating bond
  strengths become gapless at specific values of the dimerization parameter
 \, as predicted by the mapping to O(3) non-linear sigma(NLSM)  with a topo
 logical term.  To find the location of the gapless points\, we analyticall
 y and numerically study the system for various values of spin using a twis
 ted boundary condition. A tunneling calculation reproduces the NLSM result
 s obtained from more involved field theoretic methods.  Another approach i
 nvolving a certain matrix element between two Neel states provides a set o
 f gapless points which not only differ significantly from the tunneling/NL
 SM values\,  but gives good agreement with the results of an exact diagona
 lization method.\n\n//indico.ictp.it/event/a07255/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07255/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Adiabatic q
 uantum pumping in interacting systems"\n
DTSTART;VALUE=DATE-TIME:20071004T100000Z
DTEND;VALUE=DATE-TIME:20071004T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07263@ictp.it
DESCRIPTION:Adiabatic quantum pumping in noninteracting\, phase coherent s
 ystems is elegantly described by Brouwer's formula.  The latter expresses 
 geometrically the charge pumped per cycle in terms of the scattering matri
 ces.  Interactions within the dot\, while suppressing phase coherence\, ma
 ke Brouwer's formalism inapplicable.  In the presence of interactions\, is
  a geometric description of pumping still possible?  And what are the new\
 , important physical processes brought in by the presence of interaction? 
  In this talk\, I will discuss recent work focusing on giving an answer to
  these questions.  In particular\, I will discuss the interaction correcti
 ons to Brouwer's formula and show that they are related to inelastic scatt
 ering events.  As an illustrative example to discuss the role of inelastic
 ity in pumping I will consider the effect of interaction with a bosonic ba
 th on a resonant level quantum pump.  Finally\, as a second example of int
 eracting quantum pump\, I will describe the exact solution of the problem 
 of pumping in quantum dots in the Kondo regime (at the Toulouse point).\n\
 n//indico.ictp.it/event/a07263/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07263/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on disorder and strong electron correlations: \n"Gap nodes
  protected by topology in momentum space and quantum phase transitions"\n
DTSTART;VALUE=DATE-TIME:20071009T113000Z
DTEND;VALUE=DATE-TIME:20071009T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07265@ictp.it
DESCRIPTION:Many quantum condensed matter systems are strongly correlated 
 and strongly interacting fermionic systems\, which cannot be treated pertu
 rbatively.   However\, physics which emerges in the low-energy corner does
  not depend on the complicated details of the system and is relatively sim
 ple. It is determined by the nodes in the fermionic spectrum\, which are p
 rotected by topology in momentum space (in some cases\, in combination wit
 h the vacuum symmetry).  Close to the nodes the behavior of the system bec
 omes universal\; and the universality classes are determined by the toplog
 ical invariants in momentum space.  When one changes the parameters of the
  system\, the transitions are expected to occur between the vacua with the
  same symmetry but which belong to different universality classes.  Differ
 ent types of quantum phase transitions governed by topology in momentum sp
 ace are discussed.  They involve Fermi surfaces\, Fermi points\, Fermi lin
 es\, and also the topological transitions between the fully gapped states 
 which experience intrinsic quantum Hall and spin Hall effects\, etc.  The 
 consideration based on the  momentum space topology of the Green's functio
 n is general and is applicable also to the vacua of relativistic quantum f
 ields.  This is illustrated by the possible quantum phase transitions gove
 rned by topology of nodes in the spectrum of elementary particles of Stand
 ard Model.\n\n//indico.ictp.it/event/a07265/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07265/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on disorder and strong electron correlations: "On Larkin-I
 mry-Ma state of superfluid 3He"
DTSTART;VALUE=DATE-TIME:20071011T100000Z
DTEND;VALUE=DATE-TIME:20071011T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07266@ictp.it
DESCRIPTION:Superfluid 3He-A shares the properties of the spin nematic cha
 racterized by unit vector d of spin anisotropy and the chiral orbital ferr
 omagnet characterized by vector l of the orbital angular momentum of Coope
 r pairs.  This doubly anisotropic superfluid\, when it is confined in aero
 gel\, represents the most interesting example of a system  with continuous
  symmetry in the presence of random anisotropy disorder\, which is provide
 d by aerogel strands.\n	Recent NMR experiments allow us to discuss the sta
 te of 3He-A in aerogel in terms of the Larkin-Imry-Ma (LIM) state.  The LI
 M state is characterized by the short-range orientational order of the l-v
 ector\, while the long-range orientational order is destroyed by the colle
 ctive action of the randomly oriented aerogel strings.  Since 3He-A is a c
 hiral superfluid\, the disordered LIM state can be represented as  a syste
 m of randomly distributed skyrmions -- vortices with continuous cores.  Th
 e characteristic distance between the vortex-skyrmions and the size of the
 ir cores are determined by the LIM length which is of order of few microns
 .  It is much bigger than the microscopic scales -- the distance between t
 he impurities-strands.\n	A regular anisotropy may destroy the LIM effect\,
  and this does take place when one applies a uni-axial deformation to the 
 aerogel sample.  Even less than 1% deformation leads to the restoration of
  the uniform orientation of the  l-vector in the sample.  As a result the 
 value of the transverse NMR frequency shift is enhanced by an order of mag
 nitude compared to that in the LIM state.  When the deformation leads to o
 rientation of  l along the magnetic field\, it becomes possible to study n
 ovel phenomena which only occur under this arrangement and thus are not po
 ssible in bulk 3He-A.  One of these phenomena is the phase-coherent spin p
 recession recently observed in 3He-A in the deformed aerogel.  This presen
 ts another realization of the Bose-Einstein condensation (BEC) of magnons\
 , which is different from the magnon BEC found twenty years ago in 3He-B a
 nd known as the homogeneously precessing domain.  This geometry will allow
  us to stabilize and observe Alice strings -- half-quantum vortices -- in 
 rotating 3He-A.\n\n//indico.ictp.it/event/a07266/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07266/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Calculation of effecti
 ve magnetic interactions in Cr spinels"
DTSTART;VALUE=DATE-TIME:20071017T150000Z
DTEND;VALUE=DATE-TIME:20071017T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07270@ictp.it
DESCRIPTION:Recently\, ACr_2O_4 (A=Zn\, Cd\, Hg) compounds with a spinel c
 rystal structure have attracted much attention because of their unusual ma
 gnetic properties.  Structural transitions to low-temperature tetragonal p
 hase with a complex magnetic order or the appearance of magnetization plat
 eau under application of external magnetic field are supposedly caused by 
 geometrical frustrations which anti-ferromagnetically (AFM) coupled Cr spi
 ns experience on a pyrochlore lattice.  On the other hand\, CdCr_2Se_4 spi
 nel is a ferromagnetic (FM) semiconductor.  In the present work effective 
 exchange coupling constants between Cr spins in ACr_2X_4 (A=Zn\, Cd\, Hg\;
  X=O\,  S\, Se) spinels are estimated by mapping the energy of spin spiral
 s calculated within LSDA and LSDA+U approximations onto an effective Heise
 nberg model.  The calculations reproduce the change of the sign of the exc
 hange coupling between nearest Cr neighbors from AFM in O-based spinels to
  FM in S and Se based ones.  It is shown that the AFM nearest neighbor cou
 pling in ACr_2O_4$ is determined mainly by direct hopping between Cr t_{2g
 } electrons whereas the FM coupling S(Se)-based spinels is caused by Cr t_
 {2g}--X p--Cr t_{eg} hybridization.\n\n//indico.ictp.it/event/a07270/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07270/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder ad strong electron correlations "Superconducti
 ng pumps and geometric phases"\n
DTSTART;VALUE=DATE-TIME:20071018T100000Z
DTEND;VALUE=DATE-TIME:20071018T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07274@ictp.it
DESCRIPTION:I will discuss how geometric phases emerge in superconducting 
 nanocircuits.  Depending on the design both the abelian and non-abelian ve
 rsions can be realized.  I will further discuss their relation with Cooper
  pair pumping and present a proposal where non-abelian effects can be dete
 cted in the pumped charge.\n\n//indico.ictp.it/event/a07274/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07274/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seinar on Chemical Physics: "Theore
 tical studies of major earth and planetary materials"\n
DTSTART;VALUE=DATE-TIME:20071023T100000Z
DTEND;VALUE=DATE-TIME:20071023T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07279@ictp.it
DESCRIPTION:We employ first-principles calculations based on the density f
 unctional theory (DFT) and density-functional perturbation theory (DFPT) t
 o study several of the major constituents of the terrestrial and icy plane
 ts. \nIn the first part\, we use the latest theoretical developments of th
 e DFT and DFPT and their practical implementations in the ABINIT package t
 o determine the phase diagram\, the compressibility\, the high-pressure el
 astic constants and the Raman spectra for (Mg\,Fe\,Al)(Si\,Al)O3 perovskit
 e and post-perovskite. The elastic constants determined from DFPT and from
  the stress-strain fits differ by only a few GPa\, e.g. less than 5 GPa fo
 r MgSiO3 perovskite\, and they fall within 10% of the experimental values.
  The calculations of the Raman spectra are even more spectacular\, given t
 he extreme requirements for convergence and accuracy of dielectric propert
 ies\, usually hard to obtain. The agreement between linear-response and ex
 periment is excellent for both peak position and intensity. For example th
 e same three main groups of peaks in both theory and experiment characteri
 ze the Raman spectra of MgSiO3 perovskite. This made us confident of the a
 ccuracy of our results and we proposed the Raman spectra of the post-perov
 skite\, characterized by only one main peak at high pressure. Thus Raman s
 pectroscopy can be used as an identification tool for the perovskite to po
 st-perovskite phase transition in high-pressure experiments. In the same t
 heoretical framework we briefly discuss the pressure variation of the Rama
 n spectra of alumina polymorphs. \nIn the second part we discuss the phase
  diagram of solid nitrogen. Nitrogen phase diagram is characterized by sev
 eral disordered and ordered molecular structures at low pressures and an a
 tomic structure at high pressures. Here\, we propose a new molecular phase
  which can be a link in the transition path between molecular and atomic n
 itrogen. We also study in detail the dynamical and the spectroscopic prope
 rties of atomic nitrogen.\n\n//indico.ictp.it/event/a07279/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07279/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Semianr on disorder and strong electron correlations: "Non-linear 
 transport in a two dimensional electron system"\n
DTSTART;VALUE=DATE-TIME:20071025T100000Z
DTEND;VALUE=DATE-TIME:20071025T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07280@ictp.it
DESCRIPTION:One of the most exciting recent discoveries in condensed matte
 r physics is the observation of magnetoresistance oscillations and zero re
 sistance states of a two dimensional electron system (2DES).\nFor a micros
 copic description of this phenomenon I will introduce a quantum kinetic eq
 uation for a two-dimensional electron gas.  This equation can be used to c
 alculate all transport characteristics of 2DES in magnetic fields\, includ
 ing Shubnikov - de Haas oscillations\,  smooth part of the magnetoresistan
 ce\, and non-linear electric current in response to applied electric field
 s.  I will describe the components of the kinetic equation in terms of a s
 emiclassical picture of electrons moving along cyclotron trajectories.  I 
 will apply this equation to analyze the current-voltage characteristic of 
 a 2DES\, compare theoretical predictions with experimental data\, and outl
 ine potential future experiments.\n\n//indico.ictp.it/event/a07280/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07280/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seminar on Chemical Physics\n"Patch
 y colloidal particles: The role of the valence in the formation of gels"\n
DTSTART;VALUE=DATE-TIME:20071031T150000Z
DTEND;VALUE=DATE-TIME:20071031T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07281@ictp.it
DESCRIPTION:I will discuss thermodynamic and dynamic properties of simple 
 models of particles interacting via a small number of localized  patches. 
 I will show that  the resulting reduced number of bonded neighbors  has in
 teresting consequences on the thermodynamic of the system. More specifical
 ly\,\n(i) the region of the phase diagram where liquid-gas coexistence is 
 observed\nis significantly reduced as compared to the isotropic interactio
 n case.\n(ii) the wider region of stability of the liquid phase favors the
  establishment of  a homogeneous disordered material at small packing frac
 tion\, which can be named accordingly "equilibrium gels"  or "network glas
 s".\n(iii) it becomes possible to generate liquid states (i.e.  states wit
 h temperature lower than the liquid-gas critical temperature) with a vanis
 hing occupied packing fraction\, a case can not be realized with spherical
 ly interacting particles\;\nFinally\, I will show that for particles with 
 a small number of patches it is possible to derive a fully predictive para
 meter-free theory of equilibrium self-assembly by combining the Wertheim t
 heory for associating liquids with the Flory-Stockmayer approach for chemi
 cal gelation.\n\n//indico.ictp.it/event/a07281/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07281/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Interplay o
 f Coulomb and electron-phonon interactions in graphene"\n
DTSTART;VALUE=DATE-TIME:20071108T100000Z
DTEND;VALUE=DATE-TIME:20071108T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07290@ictp.it
DESCRIPTION:Electron-phonon coupling in graphene is currently a subject of
  intense research.  Theoretically\, the coupling constants are usually cal
 culated using density-functional theory (DFT)\, where the exchange (Fock) 
 term is treated in the local density approximation\, or the generalized gr
 adient approximation.\nIn this work we consider mutual effect of weak elec
 tron-phonon and strong Coulomb interactions on each other by summing up le
 ading logarithmic corrections via the renormalization group approach\, whi
 ch goes beyond Hartree-Fock approximation.  We find that coupling constant
 s to different phonon modes are renormalized differently\, which explains 
 the experimentally observed intensities of Raman peaks.\n\n//indico.ictp.i
 t/event/a07290/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07290/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR on Disorder and strong electron correlations: "Ladders and
  Bose-Einstein condensation in spin systems"\n
DTSTART;VALUE=DATE-TIME:20071115T100000Z
DTEND;VALUE=DATE-TIME:20071115T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07295@ictp.it
DESCRIPTION:The phenomenon of Bose-Einstein condensation is a fascinating 
 one. It occurs in several systems both in condensed matter and also in col
 d atomic  gases. How the interactions among the particles affect this tran
 sition is of course a very important question. In that respect\, localized
  spin systems provide a marvelous opportunity to  study the BEC of strongl
 y correlated bosons\, since spins 1/2\, or spin dimers can be  viewed as  
 hard core bosons. One the other hand in one dimension it is well known tha
 t spins behave more as fermions than as bosons.\nUnderstanding the interpl
 ay between these two limit is thus a challenging  question. Recently a com
 pound which is a good realization of ladders has been experimentally  stud
 ied and is a good playground to tackle these issues. I will thus review th
 e above physics  of ladders and BEC in spin systems\, and discuss the ques
 tion of the dimensional crossover and its  experimental consequences for q
 uantities such as the Nuclear Magnetic Resonance in such systems.\n\n//ind
 ico.ictp.it/event/a07295/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07295/
END:VEVENT
BEGIN:VEVENT
SUMMARY:INFORMAL SEMINAR  on  Statistical Physics:" Many-Body Localization
  "
DTSTART;VALUE=DATE-TIME:20071120T113000Z
DTEND;VALUE=DATE-TIME:20071120T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07297@ictp.it
DESCRIPTION:We consider low-temperature behavior of weakly interacting ele
 ctrons in disordered conductors in the regime when all single-particle eig
 enstates are localized by the quenched disorder. The key result is that in
  the absence of coupling of the electrons to any external bath dc electric
 al conductivity exactly vanishes as long as the temperature T does not exc
 eed some finite value T_c. At the same time\, it can be also proven that a
 t high enough T the conductivity is finite. These two statement simply tha
 t the system undergoes a finite temperature metal-insulator transition\, w
 hich can be viewed as Anderson-like localization of many-body wave functio
 ns in the Fock space. As a result\, in the insulating phase electron-elect
 ron interaction alone is unable to cause the relaxation and establish the 
 thermal equilibrium.\n\n//indico.ictp.it/event/a07297/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07297/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SPECIAL SEMINAR  on  Statistical Physics: " System level dynamics 
 and robustness of the genetic network regulating E.coli metabolism "
DTSTART;VALUE=DATE-TIME:20071120T133000Z
DTEND;VALUE=DATE-TIME:20071120T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07298@ictp.it
DESCRIPTION:In this talk\, I will present some of the results obtained by 
 studying the large scale transcriptional regulatory network controlling E.
  coli metabolism containing 583 genes and 96 external metabolites as a Boo
 lean dynamical system. We have studied how the attractors of the boolean d
 ynamical system depend on the initial condition of the genes and on variou
 s environmental conditions. We find that the nature of the attractors endo
 ws the cell with both stability for a fixed environment and flexibility to
  adapt to changes in the environment. We comment on design features of the
  system that are responsible for these observed system level properties. I
 n particular\, I will reflect upon our results obtained by studying this r
 eal genetic network as opposed to those obtained earlier by studying rando
 m boolean networks.\n\n//indico.ictp.it/event/a07298/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a07298/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA CONDENSED MATTER SEMINARS: "Quantum Integrable Sy
 stems in Growth Problems"
DTSTART;VALUE=DATE-TIME:20071121T150000Z
DTEND;VALUE=DATE-TIME:20071121T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07296@ictp.it
DESCRIPTION:We will review connections between the stochastic and determin
 istic Growth Problems in 2 dimensions (such as Diffusion Limited Aggregati
 on and Laplacian Growth Problem) and theory of finite and infinite dimensi
 onal integrable systems.\n\nIn particular\, we will present our recent res
 ults relating the Elliptic Growth free boundary problems and theory of alg
 ebraically integrable Calogero-Moser type systems.\n\nFinally\, we'll disc
 uss prospectives in finding correspondence between integrable statistical 
 field models and DLA type problems.\n\n//indico.ictp.it/event/a07296/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07296/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Dynamic Exploration
  of the Internet: modelization and biases"
DTSTART;VALUE=DATE-TIME:20071127T113000Z
DTEND;VALUE=DATE-TIME:20071127T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07300@ictp.it
DESCRIPTION:An accurate knowledge of Internet's topology is relevant to im
 prove its efficiency and robustness. Internet's mapping projects are based
  on collecting and merging several shortest paths from a set of sources to
  a set of destinations. I will show that these processes may generate seve
 re sampling biases depending on the topological properties of the underlyi
 ng network. The results provide some qualitative criterion useful in the a
 nalysis of experimental data. Finally\, I will discuss possible techniques
  in order to correct sampling biases in network inference.\n\n//indico.ict
 p.it/event/a07300/
LOCATION:SISSA - Aula D
URL://indico.ictp.it/event/a07300/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR on Disorder and strong electron correlations: "Dephasing b
 y non-Gaussian noise"\n
DTSTART;VALUE=DATE-TIME:20071129T100000Z
DTEND;VALUE=DATE-TIME:20071129T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07309@ictp.it
DESCRIPTION:The usual models for dissipative environments involve a bath o
 f harmonic oscillators\, producing Gaussian fluctuations. However\, modern
  experiments on dephasing in qubits and electronic interferometers indicat
 e strong coupling to non-Gaussian quantum noise. Most strikingly\, the coh
 erence (interference contrast) may oscillate as a function of time\, volta
 ge\, and other control parameters. We present the theory behind a recent "
 controlled dephasing" experiment involving an electronic Mach-Zehnder inte
 rferometer strongly coupled to the non-Gaussian shot noise of a detector e
 dge channel. Visibility oscillations are predicted (and experimentally fou
 nd) for the coupling strength between system and bath exceeding a certain 
   threshold. We argue that this is a genuine and generic feature of non-Ga
 ussian noise.\n\n//indico.ictp.it/event/a07309/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07309/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: " The Stefan Boltzma
 nn law in a small box and the high-temperature gluon gas "\n
DTSTART;VALUE=DATE-TIME:20071204T113000Z
DTEND;VALUE=DATE-TIME:20071204T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07313@ictp.it
DESCRIPTION:The blackbody radiation in thermal equilibrium at a temperatur
 e T in a box L^3 with periodic boundary conditions is affected by strong f
 inite-size effects which can be expressed in a closed form in terms of the
  dimensionless parameter LT. These have to be taken into account for a cor
 rect interpretation of the numerical simulations of gluon gas at high temp
 erature.\n\n//indico.ictp.it/event/a07313/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07313/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA CONDENSED MATTER SEMINARS: "Lattice distortion an
 d Raman scattering of hcp rare gas solids under pressure"
DTSTART;VALUE=DATE-TIME:20071205T150000Z
DTEND;VALUE=DATE-TIME:20071205T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07315@ictp.it
DESCRIPTION://indico.ictp.it/event/a07315/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07315/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR on Disorder and strong electron correlations:"Transport of
  interacting electrons through a potential barrier: nonperturbative RG app
 roach"\n
DTSTART;VALUE=DATE-TIME:20071206T100000Z
DTEND;VALUE=DATE-TIME:20071206T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07316@ictp.it
DESCRIPTION:We calculate the linear response conductance of electrons in a
  Luttinger liquid with arbitrary interaction g_{2}\, and subject to a pote
 ntial barrier of arbitrary strength\, as a function of temperature and/or 
 the length of interaction region. Our result agrees with known limiting ca
 ses. We first map the Hamiltonian in the basis of scattering states into a
 n effective low energy Hamiltonian in current algebra form. Analyzing the 
 perturbation theory in the fermionic representation the diagrams contribut
 ing to the renormalization group (RG) beta-function are identified. The un
 iversal part of beta-function is given by a ladder series and is summed to
  all orders in g_{2}. The RG-equation for  temperature dependent conductan
 ce is solved analytically.  A non-universal part of beta-function beyond t
 he ladder series is discussed and compared to the recent exact solution of
  the problem.\n\n//indico.ictp.it/event/a07316/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07316/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR on Disorder and strong electron correlations:"Spin Hall ef
 fects in HgTe Quantum Well Structures"\n\n
DTSTART;VALUE=DATE-TIME:20071206T150000Z
DTEND;VALUE=DATE-TIME:20071206T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07317@ictp.it
DESCRIPTION:Spin-orbit interaction (SOI) in 2DEGs causes many interesting 
 and potentially useful effects\, such as the generation of an intrinsic sp
 in accumulation polarized normal to the 2DEG at the edges\, caused by the 
 presently very topical spin-Hall effect [1]. So far no direct evidence for
  the intrinsic SHE has been obtained by transport experiments. Here\, we d
 emonstrate that in specially designed nanostructures [2]\, which are  base
 d on narrow gap HgTe type-III quantum wells (QW)\, a detection of the spin
   signal is possible via voltage measurements. \nRecently\, it was pointed
  out that inverted HgTe QW structurescan be regarded as non-trivial insula
 tors[3]\, in which the quantum spin Hall insulator state[4]  should occur.
  In this state\, a pair of spin polarized helical edge channels  develops 
 when the bulk of the material is insulating\, leading to a quantized  cond
 uctance. We will discuss our recent transport measurements on gated low  d
 ensity HgTe QWs that yield a first evidence for the existence of this effe
 ct.\n\n//indico.ictp.it/event/a07317/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07317/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR:"How scaling and mark
 et efficiency determine the irreversible evolution of an index"\n
DTSTART;VALUE=DATE-TIME:20071211T113000Z
DTEND;VALUE=DATE-TIME:20071211T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07319@ictp.it
DESCRIPTION:In setting up a stochastic description of the time evolution o
 f a financial index\, the challenge consists in devising a model compatibl
 e with all stylized facts emerging from the analysis of financial time ser
 ies and providing a reliable basis for simulating such series. Based on co
 nstraints imposed by market efficiency and on an inhomogeneous-time genera
 lization of standard simple scaling\, we propose an analytical model which
  accounts simultaneously for empirical results like the linear decorrelati
 on of successive returns\, the power law dependence on time of the volatil
 ity autocorrelation function\, and the multiscaling associated to this dep
 endence. In addition\, our approach gives a justification and a quantitati
 ve assessment of the irreversible character of the index dynamics. This ir
 reversibility enters as a key ingredient in a novel simulation strategy of
  index evolution which demonstrates the predictive potential of the model.
 \n\n//indico.ictp.it/event/a07319/
LOCATION:Lecture Room D - SISSA Main Blg
URL://indico.ictp.it/event/a07319/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR on Disorder and strong electron correlations:"A few electr
 on triple quantum dot and phonon mediated transport of electrons in nano c
 ircuits"\n
DTSTART;VALUE=DATE-TIME:20071213T100000Z
DTEND;VALUE=DATE-TIME:20071213T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07323@ictp.it
DESCRIPTION:Abstract\nSolid state based quantum dots (QD) are heavily disc
 ussed for applications as qubits\, but also provide a beautiful playground
  for basic research on artificial molecules. First\, concepts needed to un
 derstand transport and charge spectroscopy measurements on coupled QDs wil
 l be developed. Then experimental results on a few electron triple QD\, a 
 double QD quantum ratchet and interaction mechanisms involved are discusse
 d. \nOur few electron serial triple QD is electrostatically defined in a s
 tandard GaAs/AlGaAs heterostructure containing a two-dimensional electron 
 system. Ground state stability diagrams detected with a single quantum poi
 nt contact (QPC) demonstrate complete control of the triple QDs charge con
 figuration in the few electron regime. The complex interplay between charg
 e states of the three coupled QDs near points of high degeneracy will be d
 iscussed. In this regime we observe electron transport through the three Q
 Ds reflecting quantum cellular automata physics. \nThe remainder of the ta
 lk will be devoted to the interaction of a strongly driven QPC with anothe
 r unbiased QPC or a double QD. These experiments can be seen in the contex
 t of back-action of a charge detector (the QPC) onto a qubit (the double Q
 D). Using the strongly driven QPC as non-equilibrium energy source we real
 ize a double QD quantum ratchet. A second experiment involving two QPCs il
 luminates the possible role of electron-phonon interaction in such devices
 .\n\n//indico.ictp.it/event/a07323/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a07323/
END:VEVENT
BEGIN:VEVENT
SUMMARY:INFORMAL SEMINAR  on  Statistical Physics: " Network Games "
DTSTART;VALUE=DATE-TIME:20071214T100000Z
DTEND;VALUE=DATE-TIME:20071214T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a07318@ictp.it
DESCRIPTION:In a variety of contexts\, including things like decisions of 
 which products to buy\, whether to become informed about political candida
 tes\, or whether to become educated\,  peoples' decisions are heavily infl
 uenced by their friends and neighbors.  A framework is developed to analyz
 e such decision making and strategic interactions when embedded in a socia
 l network of connections. Results characterize how the network structure\,
  an individual's position within the network\, the strategic structure of 
 the games and decisions\, and the level of information\, shape behavior.\n
 \n//indico.ictp.it/event/a07318/
LOCATION:ICTP Main Building Lecture Room C
URL://indico.ictp.it/event/a07318/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Broken and emerging
  symmetries of turbulence"
DTSTART;VALUE=DATE-TIME:20080115T113000Z
DTEND;VALUE=DATE-TIME:20080115T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a083@ictp.it
DESCRIPTION:This is a review of most fundamental (symmetry) aspects of tur
 bulence for a physical audience.  To excite turbulence\, one needs an exte
 rnal pumping\;  to keep it in a steady state one needs dissipation. Pumpin
 g and dissipation break symmetries like time-reversibility\, isotropy\, sc
 ale invariance.  Since pumping and dissipation act on vastly different sca
 les\, the question appears what are the statistical properties of a system
  at the intermediate scales (called inertial interval or transparency wind
 ow).   I shall describe both anomalies (when the symmetry is not restored 
 even when the symmetry-breaking factor goes to zero) and emerging symmetri
 es like conformal invariance. In the latter case\, by using the language o
 f Schramm-Loewner Evolution for analysis of fractal clusters\, one discove
 rs a surprising similarity between critical phenomena and turbulence.\n\n/
 /indico.ictp.it/event/a083/
LOCATION:SISSA - Lecture Room 'D'
URL://indico.ictp.it/event/a083/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Spin models on rand
 om graphs with controlled topologies beyond degree constraints"
DTSTART;VALUE=DATE-TIME:20080116T103000Z
DTEND;VALUE=DATE-TIME:20080116T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a081@ictp.it
DESCRIPTION:We study Ising spin models on finitely connected random intera
 ction graphs which are drawn from an ensemble in which not only the degree
  distribution p(k) can be chosen arbitrarily\, but which allows for furthe
 r fine-tuning of the topology via preferential attachment of edges on the 
 basis of an arbitrary function Q(k\,k') of the degrees of the vertices inv
 olved. We solve these models using finite connectivity equilibrium replica
  theory\, within the replica symmetric ansatz. In our ensemble of graphs\,
  phase diagrams of the spin system are found to depend no longer only on t
 he chosen degree distribution\, but also on the choice made for Q(k\,k'). 
 The increased ability to control interaction topology in solvable models b
 eyond prescribing only the degree distribution of the interaction graph en
 ables a more accurate modeling of real-world interacting particle systems 
 by spin systems on suitably defined random graphs.\n\n//indico.ictp.it/eve
 nt/a081/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a081/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Dirac fermi
 ons in a power-law correlated random vector potential"\n
DTSTART;VALUE=DATE-TIME:20080117T100000Z
DTEND;VALUE=DATE-TIME:20080117T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a086@ictp.it
DESCRIPTION:We study localization properties of two-dimensional Dirac ferm
 ions subject to a power-law correlated random vector potential describing\
 , e.g.\, the effect of "ripples" in graphene.  By using a variety of techn
 iques (low-order perturbation theory\, self-consistent Born approximation\
 , replicas\, and supersymmetry) we compute the low-energy density of state
 s and discuss a possible (pre)localization of the entire single particle s
 pectrum.\n\n//indico.ictp.it/event/a086/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a086/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Field theoretical a
 pproach to layered superconductors"\n
DTSTART;VALUE=DATE-TIME:20080122T113000Z
DTEND;VALUE=DATE-TIME:20080122T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0811@ictp.it
DESCRIPTION:Typical high transition temperature superconductors consist of
  copper-oxide superconducting planes separated by insulating layers. The s
 uperconducting layers are coupled by Josephson and electromagnetic interac
 tions. Although\, the microscopic theory of high T_c superconductivity has
  not been constructed yet\, the phenomenological description is well-estab
 lished. The vortex dynamics of a 2D (uncharged) superfluid film can be des
 cribed by the following models which are assumed to belong to the the same
  universality class: the two-dimensional sine--Gordon field theory (2D--SG
 )\, the XY spin model (2D--XY) and the 2D-Coulomb gas.  For charged 2D fil
 ms\, i.e. for superconducting thin films\, the vortex behavior is describe
 d by the massive 2D--SG\, the frustrated 2D--XY and the 2D--Yukawa gas. Th
 e gas of topological excitations and the equivalent spin model of a system
  of coupled layers is known for the Josephson and for the magnetically cou
 pled case\, however\, no field theoretical model has been constructed.\n\n
 We propose a quantum field theoretical approach to the vortex dynamics of 
 magnetically coupled layered superconductors by constructing a two-dimensi
 onal multi-layer sine-Gordon type model which we map onto a gas of topolog
 ical excitations.  The known interaction potentials of magnetically couple
 d vortices are consistently obtained from our field-theoretical analysis. 
  Originally\, this layered SG model has been introduced as the bosonised v
 ersion of the multi-flavor Schwinger model\, and\, consequently\, it has b
 een used to study quark confinement.  We analyze the phase structure of th
 e multi-layer sine--Gordon model by functional renormalization group metho
 ds.\n\n//indico.ictp.it/event/a0811/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0811/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR on Disorder and strong electron correlations: "Diagrammati
 c Monte Carlo for resonant fermions "\n
DTSTART;VALUE=DATE-TIME:20080124T100000Z
DTEND;VALUE=DATE-TIME:20080124T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0818@ictp.it
DESCRIPTION:I will discuss two different Diagrammatic Monte Carlo schemes 
 for solving the problem of the BCS-BEC crossover in a Fermi gas with reson
 ant attractive interactions (the so-called zero-range universal limit). On
 e is based on summation of relevant Feynman diagrams for the partition fun
 ction of up to several hundred fermions.  We determine the normal-superflu
 id transition temperature in the BCS-BEC crossover region and  unambiguous
 ly confirm that the maximum of Tc is on the Bose –side and  at unitarity
  T_c/E_F=0.152(7) (in disagreement with other groups!) . The other scheme 
 is based on direct summation of Feynman diagram for the proper self-energy
 . This approach is used to solve the problem of a single spin-down fermion
  resonantly interacting with the Fermi gas of spin-up particles. Though th
 e original series based on bare propagators are sign-alternating and often
  divergent one can still determine the answer behind them by using two str
 ategies (separately or together): (i) using proper series re-summation tec
 hniques\, and (ii) introducing renormalized propagators which are defined 
 in terms of the simulated proper self-energy\, i.e. making the entire sche
 me self-consistent. Our solution is important for understanding the phase 
 diagram and properties of the BCS-BEC crossover in the strongly imbalanced
  regime. On the technical side\, we develop a generic sign-problem toleran
 t method for exact numerical solution of polaron-type models\, and\, possi
 bly\, of the interacting many-body Hamiltonians.\n\n//indico.ictp.it/event
 /a0818/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0818/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Matrix models in th
 e quantum Hall effect"
DTSTART;VALUE=DATE-TIME:20080129T120000Z
DTEND;VALUE=DATE-TIME:20080129T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0821@ictp.it
DESCRIPTION:We discuss a quantum-mechanical model with matrix variables th
 at has been originally introduced for D0-branes in string theory. \nUpon r
 eplacing Hall electrons with D0-branes\, the model naturally accounts for 
 the Laughlin and Jain wave functions of phenomenological approaches. The m
 atrix model could provide another effective field theory of the fractional
  quantum Hall effect.\n\n//indico.ictp.it/event/a0821/
LOCATION:ICTP
URL://indico.ictp.it/event/a0821/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar:"Quantum electron gla
 sses and electron assisted hopping"\n
DTSTART;VALUE=DATE-TIME:20080201T100000Z
DTEND;VALUE=DATE-TIME:20080201T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0825@ictp.it
DESCRIPTION:Insulators close to the metal insulator transition exhibit int
 eresting collective electronic phenomena which are still rather poorly und
 erstood.   A prominent feature in such systems is the purely electronic na
 ture of activated transport apparent in experiments\, which is inconsisten
 t with the theory of phonon-assisted hopping conduction and thus has remai
 ned an unexplained puzzle for decades.  The situation became even less cle
 ar when recently theories of many body localization predicted a metal insu
 lator transition at finite temperature for interacting electrons that are 
 decoupled from phonons.\nIn this talk I will address this problem for Ande
 rson insulators with a single-particle localization length much larger tha
 n the mean distance between electrons.  Under these circumstances Coulomb 
 interactions drive the electrons into a strongly correlated quantum glass 
 phase with non-trivial collective behavior.  I will show that a typical me
 tastable state exhibits a gapless spectrum of collective excitations which
  act as a bath with which individual electrons can exchange energy. In 2D 
 systems\,  this results in a hopping transport mechanism with a nearly uni
 versal pre-exponential factor of order e2/h.  This is in good agreement wi
 th many recent experiments.\n\n//indico.ictp.it/event/a0825/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0825/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Arctic curves for t
 he Domain Wall Six-Vertex Model "\n
DTSTART;VALUE=DATE-TIME:20080205T113000Z
DTEND;VALUE=DATE-TIME:20080205T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0829@ictp.it
DESCRIPTION:The Arctic Circle Theorem (Jockusch-Propp-Shor) concerns a mod
 el of domino tiling with peculiar boundary conditions\, exhibiting phase s
 eparation\, with the emergence of `limit shapes' and `arctic curves'. The 
 computation of such objects\, and the characterization of their fluctuatio
 ns\, has been performed for several other models (Propp\, Kenyon\, Resheti
 khin\, Okounkov)\, with deep implication in algebraic combinatorics and al
 gebraic geometry. However all such models can be viewed as models of dimer
 s\, i.e. of discrete free fermions. The most natural generalization of suc
 h models\, including an interaction\, is provided by the Domain Wall Six-V
 ertex Model. We here derive\, for this model with generic values of its pa
 rameter\, the exact analytic expression of the arctic curves\, and charact
 erize their fluctuations\, thus extending the Arctic Circle Theorem beyond
  the dimer (free fermion) case.\n\n//indico.ictp.it/event/a0829/
LOCATION:SISSA\, Lecture Room 'D'
URL://indico.ictp.it/event/a0829/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Statistical Physics: "Dynamics of k-core perco
 lation"
DTSTART;VALUE=DATE-TIME:20080205T140000Z
DTEND;VALUE=DATE-TIME:20080205T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0830@ictp.it
DESCRIPTION:We shall discuss the following problem: A fully occupied latti
 ce is subjected to a sequence of random attacks.  Each attack removes a si
 te at random and recursively removes all other sites that have less than k
  nearest neighbors. Random attacks continue till the  lattice is empty.  T
 he entire sequence of events is characterized by the size of avalanche (to
 tal number of sites removed) in each attack a1\, a2\, a3\, ..... Some ques
 tions of interest are: (i) the distribution of avalanche sizes\, (ii)  the
  size of the last avalanche that empties the lattice\, and the nature of f
 luctuations just before the lattice is emptied. We attempt to answer these
  questions by numerical simulations as well as exact solutions on a tree a
 nd place this work in the broader context of first order phase transitions
  that are preceded by critical fluctuations.\n\n//indico.ictp.it/event/a08
 30/
LOCATION:ICTP New Meeting Room (former 237)
URL://indico.ictp.it/event/a0830/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and Strong Correlations: "Wishart-Laguerre ens
 emble of Random Matrices"
DTSTART;VALUE=DATE-TIME:20080207T100000Z
DTEND;VALUE=DATE-TIME:20080207T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0834@ictp.it
DESCRIPTION:Introduced in 1928\, many years before the celebrated Gaussian
  ensembles of\nWigner-Dyson\, the Wishart ensemble contains covariance mat
 rices of a\nmaximally random data set.\nThe 'N' eigenvalues constitute a s
 et of strongly correlated random\nvariables\, for which a number of\nanaly
 tical results (both for finite N and for N\\to\\infty) can be derived.\nIn
  the first part\, I will present general results and techniques\, and give
 \ntwo examples of application:\n1) spectral properties of financial data s
 ets (and Marcenko-Pastur\ndistribution).\n2) random pure entangled states 
 in a bipartite Hilbert space (and\ndistribution of the smallest eigenvalue
 ).\nIn the second part\, I concentrate on a recent result (large deviation
  of\nthe maximum eigenvalue) and on some work in progress (superstatistica
 l\nWishart-Laguerre ensemble). I also point out the differences between\ns
 pectral results on a global (macroscopic\, non-universal)\, and local\n(mi
 croscopic\, universal) scale.\n\n//indico.ictp.it/event/a0834/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0834/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Agglomeration of DN
 A-looping proteins"
DTSTART;VALUE=DATE-TIME:20080212T113000Z
DTEND;VALUE=DATE-TIME:20080212T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0838@ictp.it
DESCRIPTION:The transcriptional activity is not evenly distributed inside 
 the cell\, but it is concentrated in focal points around so-called transcr
 iption factories. The formation of transcription factories and DNA looping
  are considered to be of fundamental importance for the large-scale spatia
 l organization of the transcriptional activity. We propose a thermodynamic
  mechanism for the formation of transcriptional foci via the joint agglome
 ration of DNA-looping proteins and protein-binding domains on DNA: The com
 petition between the gain in protein-DNA binding free energy and the entro
 py loss due to DNA looping is argued to result in an effective attraction 
 between loops. A mean-field description can be solved analytically via a m
 apping to a restricted random-graph ensemble. It shows the emergence of pr
 otein clusters containing a finite fraction of all looping proteins. If th
 e entropy loss due to a single DNA loop is high enough\, this transition i
 s found to be of first order.\n\n//indico.ictp.it/event/a0838/
LOCATION:ICTP
URL://indico.ictp.it/event/a0838/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Topological quantum
  computation from non-abelian anyons"\n
DTSTART;VALUE=DATE-TIME:20080219T113000Z
DTEND;VALUE=DATE-TIME:20080219T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0844@ictp.it
DESCRIPTION:I discuss how systems with non-abelian anyons can be used to b
 uild a topological quantum computer. Operations are performed by braiding 
 the anyons\; because the outcome of braiding is a purely topological prope
 rty\, such quantum computers should be robust against local errors. I will
  give several examples of how such anyons arise in fractional quantum Hall
  systems and in quantum loop models.\n\n//indico.ictp.it/event/a0844/
LOCATION:SISSA\, Lecture Room 'D'
URL://indico.ictp.it/event/a0844/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Josephson 
 junctions on inhomogeneous networks"\n
DTSTART;VALUE=DATE-TIME:20080221T100000Z
DTEND;VALUE=DATE-TIME:20080221T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0849@ictp.it
DESCRIPTION:For superconducting arrays built on an inhomogeneous architect
 ure\, an enhancement of the Josephson critical current along a part of the
  network has been recently observed: I will present a discussion of these 
 results and the comparison with the findings obtained from the Bogolyubov-
 de Gennes equations.  Finally\, a discussion of the behavior of statistica
 l mechanics models on related inhomogeneous networks is presented.\n\n//in
 dico.ictp.it/event/a0849/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0849/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Entanglement\, nonl
 inear dynamics and Heisenberg limit with Bose-Einstein condensates"\n
DTSTART;VALUE=DATE-TIME:20080226T113000Z
DTEND;VALUE=DATE-TIME:20080226T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0851@ictp.it
DESCRIPTION:I introduce a sufficient condition for multi-particle entangle
 ment which is also necessary and sufficient for sub shot-noise sensitivity
  in the estimation of a collective rotation angle.  The connection is prov
 ided by the Fisher information\, which is a simple measure of statistical 
 distance among quantum states.  I show how to produce this "useful" entang
 lement with dilute Bose-Einstein condensates and discuss applications on M
 ach-Zehnder interferometry with phase sensitivity at the Heisenberg limit.
 \n\n//indico.ictp.it/event/a0851/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0851/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Loewner ev
 olution in growth processes"
DTSTART;VALUE=DATE-TIME:20080228T100000Z
DTEND;VALUE=DATE-TIME:20080228T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0854@ictp.it
DESCRIPTION:This is an introductory review of application of deterministic
  and stochastic Loewner chains in equilibrium and non-equilibrium statisti
 cal mechanics and free boundary problems of fluid dynamics.\n\n//indico.ic
 tp.it/event/a0854/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0854/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Ordinary differenti
 al equations\, minimal models and the McNugget problem"
DTSTART;VALUE=DATE-TIME:20080304T113000Z
DTEND;VALUE=DATE-TIME:20080304T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0857@ictp.it
DESCRIPTION:Recently\, surprising links between integrable models of quant
 um field theory and statistical mechanics\, and the theory of ordinary dif
 ferential equations\,  have been found.  This talk will explain the basics
  of this connection\, and then go on to outline one application to the so-
 called minimal models of conformal field theory.\n\n//indico.ictp.it/event
 /a0857/
LOCATION:SISSA - Lecture Room 'D'
URL://indico.ictp.it/event/a0857/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Energy loc
 alization in complex networks of nonlinear oscillators: Interplay between 
 disorder and nonlinearity in protein dynamics "
DTSTART;VALUE=DATE-TIME:20080306T100000Z
DTEND;VALUE=DATE-TIME:20080306T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0856@ictp.it
DESCRIPTION:Discrete breathers (DB) are spatially-localized\, time-periodi
 c vibrations that arise under general conditions in discrete\, extended no
 nlinear systems.  While much is known concerning their existence and stabi
 lity in spatially periodic media\, much less is known about the interplay 
 of nonlinearity and spatial heterogeneity in disordered systems\, where lo
 calization of vibrational energy is also fostered as a result of breaking 
 of translational invariance.\n\nWe introduce a coarse-grained\, topology-b
 ased nonlinear network model of protein dynamics with the aim of investiga
 ting the interplay of spatial disorder and nonlinearity in biological mole
 cules.  DB solutions\, characterized both numerically with the surface coo
 ling technique and analytically\, show that localization of energy occurs 
 generically also in the presence of disorder\, but is a site-dependent and
 \, on a larger scale\, a fold-dependent process.  In particular\, we find 
 that\, as a sheer consequence of disorder\,  a non-zero energy gap for exc
 iting a DB at a given site either exists or not.  Interestingly\, in the f
 ormer case\, the gaps arise as a result of the  impossibility of exciting 
 small-amplitude modes in the first place.  In the latter case\, a small su
 bset  of linear localized modes act as accumulation points\, whereby DBs c
 an be continued to arbitrary small energies\, while unavoidably approachin
 g one of such normal  modes.\n\nRemarkably\, our cooling simulations show 
 that localized modes of nonlinear origin form spontaneously in the stiffes
 t parts of the structure.  Analytic calculations further reveal that such 
 regions are also the sectors where DBs are characterized by the smallest e
 nergy gaps. Besides being interesting per se\, such results  provide a str
 aightforward way for interpreting the recently discovered link between loc
 al stiffness of proteins and enzymatic activity.  They strongly suggest th
 at nonlinear vibrational modes may play an important role in enzyme functi
 on\, allowing for a ready energy storage channel during the catalytic proc
 ess.\n\n//indico.ictp.it/event/a0856/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0856/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical phsycis seminar: "Griffiths singulari
 ties in finite-dimensional spin glasses"\n
DTSTART;VALUE=DATE-TIME:20080307T100000Z
DTEND;VALUE=DATE-TIME:20080307T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0866@ictp.it
DESCRIPTION:The distribution of zeros of the partition function is studied
  for the two- and three-dimensional Ising spin glasses on the complex fiel
 d plane.  We estimate the density of zeros on the imaginary axis by an imp
 ortance-sampling Monte Carlo algorithm\, which enables us to sample very r
 are events.  Our result suggests that the density has an essential singula
 rity at the origin\, giving the first evidence for a Griffiths singularity
  in spin glass systems in equilibrium.\n\n//indico.ictp.it/event/a0866/
LOCATION:SISSA - Lecture Room 'D'
URL://indico.ictp.it/event/a0866/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Starling flocks: An
  empirical study of the interaction ruling collective animal behaviour"
DTSTART;VALUE=DATE-TIME:20080311T113000Z
DTEND;VALUE=DATE-TIME:20080311T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0861@ictp.it
DESCRIPTION:Numerical models indicate that collective animal behaviour may
  emerge from simple local rules of interaction among the individuals.   Ho
 wever\, very little is known about the nature of such interaction\, so tha
 t models and theories mostly rely on aprioristic assumptions.  By reconstr
 ucting the three-dimensional position of individual birds in airborne floc
 ks of few thousands members\, we prove that the interaction does not depen
 d on the metric distance\, as most current models and theories assume\, bu
 t rather on the topological distance.  In fact\, we discover that each bir
 d interacts on average with a fixed number of neighbours (six-seven)\, rat
 her than with all neighbours within a fixed metric distance.  We argue tha
 t a topological interaction is indispensable to maintain flock's cohesion 
 against the large density changes caused by external perturbations\, typic
 ally predation.  We support this hypothesis by numerical simulations\,  sh
 owing that a topological interaction grants significantly higher cohesion 
 of the aggregation compared to a standard metric one.\n\n//indico.ictp.it/
 event/a0861/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0861/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal seminar on Chemical physics: "Struc
 tures and superconductivity of selected high pressure solids"\n
DTSTART;VALUE=DATE-TIME:20080311T100000Z
DTEND;VALUE=DATE-TIME:20080311T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0867@ictp.it
DESCRIPTION:Recent achievements in synchrotron instrumentations have great
 ly improved the quality of powder diffraction data obtained from a diamond
  anvil cell.  With structural refinement techniques\, many new structures 
 of solid materials at high pressures have been discovered.  In a number of
  solids\, these structural changes also induce metallization and lead to t
 he appearance of superconductivity upon compressing.  On the theoretical s
 ide\, typical approaches for predicting/determining unknown high-pressure 
 crystal structures usually involve dynamical processes.  We have tried ano
 ther approach based on evolutionary algorithms proposed recently.  This is
  an attempt to predict the most stable crystal structure and energetically
  favourable meta-stable structures without any approximation on initial st
 ructures.  During evolutionary procedures\, randomly generated structures 
 evolve gradually into lower energy phases after a few generations.  We hav
 e investigated the high-pressure structures of calcium and predicted two n
 ew stable structures that might explain the diffraction pattern of Ca-IV a
 nd Ca-V.  Another example will be presented is the prediction of a metasta
 ble single-bonded phase of nitrogen.  The search of a synthetic strategy f
 or novel materials with high-Tc has been a continuing challenge.  Recently
  there have been several new proposals relating superconductivity with som
 e tailgate signatures for prospective candidate materials.  Among these pr
 oposals are (i) the occurrence of low vibrational frequencies (ii) simulta
 neous occurrence of dynamical and electronic instabilities.  Here we demon
 strated successfully that these conditions can be satisfied in a high pres
 sure phase of SnH4.  We predicted this material would be superconducting w
 ith a Tc close to 80 K at 120 GPa.  Some other high-pressure superconducto
 rs will be briefly reviewed.\n=\n* Work done in collaboration with John S.
  Tse\n\n//indico.ictp.it/event/a0867/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0867/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"On statisti
 cal mechanics of a single particle in random landscapes"\n
DTSTART;VALUE=DATE-TIME:20080313T100000Z
DTEND;VALUE=DATE-TIME:20080313T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0868@ictp.it
DESCRIPTION:I am going to discuss recent results of the replica approach t
 o statistical mechanics of a single classical particle placed in a random 
 N>>1-dimensional Gaussian landscape.  The particular attention will be pai
 d to the case of landscapes with logarithmically growing correlations and 
 to its recent generalizations.  Those landscapes give rise to a rich multi
 fractal spatial structure of the associated Boltzmann-Gibbs measure.  If t
 ime allows\, I will also briefly discuss a one-dimensional variant of the 
 model which can be analyzed by a mapping to the Dyson's Coulomb gas.  In p
 articular\, in the latter case we conjecture the explicit form of the dist
 ribution of the lowest minimum in such a potential.\n\n//indico.ictp.it/ev
 ent/a0868/
LOCATION:ICTP Main Building Seminar Room
URL://indico.ictp.it/event/a0868/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Topological
  phase transition in an exactly solvable model"\n
DTSTART;VALUE=DATE-TIME:20080403T100000Z
DTEND;VALUE=DATE-TIME:20080403T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0882@ictp.it
DESCRIPTION:The Kitaev model is an exactly solvable spin-1/2 system on the
  honeycomb lattice.  It undergoes a topological phase transition from a ph
 ase with an energy gap carrying Abelian anyons to a gapless one with non-A
 belian anyons. The model is generally considered a prototype to do quantum
  computation.  We construct and exactly solve a three dimensional model wh
 ich is a generalization of the Kitaev model.  We further show that there a
 re excitations localized on loops that can possibly obey nontrivial statis
 tics.\n\n//indico.ictp.it/event/a0882/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0882/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Critical Casimir fo
 rces"
DTSTART;VALUE=DATE-TIME:20080408T113000Z
DTEND;VALUE=DATE-TIME:20080408T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0889@ictp.it
DESCRIPTION:Long-ranged correlations in a fluid close to its critical poin
 t lead to clearly identifiable effective forces on confining walls. The co
 rresponding universal scaling functions are discussed for different bounda
 ry conditions and geometries. The theoretical predictions are compared wit
 h high precision experimental data for He4 and He3/He4 wetting films near 
 the superfluid phase transition as well with synchrotron scattering data f
 rom classical binary liquid mixtures. Applications for colloidal suspensio
 ns are discussed.\n\n//indico.ictp.it/event/a0889/
LOCATION:Lecture Room 'D'\, SISSA Main Bldg.
URL://indico.ictp.it/event/a0889/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Single-mole
 cule transistors - A new perspective on the \nAnderson-Holstein model"\n
DTSTART;VALUE=DATE-TIME:20080410T143000Z
DTEND;VALUE=DATE-TIME:20080410T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0890@ictp.it
DESCRIPTION:Following up on a long-standing suggestion by Aviram and Ratne
 r\, experimenters have recently made great efforts in contacting and gatin
 g single molecules.  Such experiments pose new theoretical challenges not 
 only because typical energy and length scales are different from those in 
 conventional nanostructures such as quantum dots\, but also because they i
 nvolve degrees of freedom specific to molecular structures such as discret
 e vibrational modes or localized spins.  In this talk\, I will discuss sev
 eral situations where the coupling to vibrational modes is predicted to dr
 amatically affect the transport properties.  Specifically\, I will show th
 at electron-vibron coupling can induce self-similar avalanche transport as
  well astunneling of electron pairs\n\n//indico.ictp.it/event/a0890/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0890/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Periodic orbits\, l
 ocalization in normal mode space\, and the Fermi-Pasta-Ulam problem"
DTSTART;VALUE=DATE-TIME:20080414T143000Z
DTEND;VALUE=DATE-TIME:20080414T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0893@ictp.it
DESCRIPTION:In 1955 Fermi\, Pasta and Ulam (FPU) reported on the nonequipa
 rtition of a nonlinear atomic chain\, with initially one normal mode excit
 ed.  Modern computational studies show\, that on a first\, relatively shor
 t\, time scale the energy is distributed among a few neighbouring modes in
  modal space\, with more distant modes being exponentially weakly excited 
 - i.e.\, one observes localization in normal mode space.  On a much larger
  second time scale (which was not reachable wih the MANIAC I)\, the tail m
 odes are slowly growing\, and finally the system does equilibrate. The pro
 blem then is to explain i) the exponential localization of energy in modal
  space on intermediate time scales\, and ii) the way the time scales depen
 d on the essential parameters (wave number\, energy density).  Despite its
  strong impact on nonlinear dynamics and statistical physics\, the paradox
  remained essentially unexplained for decades - ideal grounds for the appe
 arance of myths.\nRecent studies show that the model allows for exact time
 -periodic solutions (q-breathers)\, which are exponentially localized in t
 he space of normal modes. The trajectory initially computed by FPU is a sl
 ight perturbation away from an exact q-breather orbit. Consequently most o
 f the key observations related to the FPU problem (localization of energy 
 in normal mode space for long times\, recurrence on relatively short times
 \,  system size and energy thresholds) are captured by the properties of q
 -breathers and the phase space flow nearby.  The underlying concept is muc
 h more general\, and can be easily extended to two-and three-dimensional f
 inite lattices.  A scaling approach leads to nontrivial predictions in the
  limit of infinite system sizes.\n\n//indico.ictp.it/event/a0893/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0893/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed matter seminar: " New approaches in mol
 ecular dynamics: From stochastic thermostats to rare-event sampling "
DTSTART;VALUE=DATE-TIME:20080415T100000Z
DTEND;VALUE=DATE-TIME:20080415T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0891@ictp.it
DESCRIPTION:A new molecular-dynamics algorithm for sampling the canonical 
 distribution will be presented [1].\nIn this approach the velocities of al
 l the particles are rescaled by a properly chosen random factor.\nIts prop
 erties will be illustrated for Lennard-Jones and water in the solid and li
 quid phases.\nNext\, a method for determining the free-energy dependence o
 n a selected number of order parameters using an adaptive bias will be int
 roduced [2]. This method has metadynamics and canonical sampling as limiti
 ng cases and allows for easy and rigorous error control.\nFinally\, a new 
 technique based on a combination of metadynamics and parallel-tempering wi
 ll be discussed [3].\nThis scheme will be shown to be an affordable method
  for the computation of free-energy landscapes in biomolecules.  The foldi
 ng of the beta-hairpin in explicit water will then be used to illustrate t
 he power of this technique.\n[1] G. Bussi\, D. Donadio and M. Parrinello\,
  J. Chem. Phys. 126\, 014101 (2007)\n[2] A. Barducci\, G. Bussi and M. Par
 rinello\, Phys. Rev. Lett. 100\,  020603 (2008).\n[3] G. Bussi\, F. L. Ger
 vasio\, A. Laio and M. Parrinello\, J. Am. Chem.  Soc. 128\, 13435 (2006).
 \n\n//indico.ictp.it/event/a0891/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0891/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar "From holonomy of the
  non-critical Ising model form factors to n-fold integrals and the theory 
 of elliptic curves\, moduli spaces\,... and beyond"
DTSTART;VALUE=DATE-TIME:20080415T113000Z
DTEND;VALUE=DATE-TIME:20080415T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0892@ictp.it
DESCRIPTION:Abstract\n\nWe recall the form factors of the two-point diagon
 al correlation function of the Ising model on the square lattice and their
  associated linear differential equations which exhibit both a "Russian-do
 ll'' nesting\,  and a decomposition of the linear differential operators a
 s a direct sum of operators.\nThe scaling limit of these differential oper
 ators breaks the direct sum structure but not the  "Russian doll'' structu
 re\, the "scaled'' linear  differential operators being no longer Fuchsian
 .\nWe also discuss the nature of the singularities emergingfrom this appro
 ach.\n\n//indico.ictp.it/event/a0892/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0892/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR on Disorder and strong electron correlations: "The effecti
 ve mass of the charge carrier in non-polar liquid: applications to superfl
 uid helium"\n\n
DTSTART;VALUE=DATE-TIME:20080417T100000Z
DTEND;VALUE=DATE-TIME:20080417T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0894@ictp.it
DESCRIPTION:We consider the problem of the effective mass of a charge carr
 ier definition in non-polar viscous liquid and show how the problem of its
  formal divergency can be resolved. Then the effective mass of a snowball 
 in superfluid Helium is revised and observed a long ago its temperature de
 pendence is explained theoretically.\n\n//indico.ictp.it/event/a0894/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0894/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Semianr on Disorder and strong electron correlations: "Numerical o
 bservation of Hawking radiation from acoustic black holes in atomic Bose-E
 instein condensates"\n
DTSTART;VALUE=DATE-TIME:20080424T100000Z
DTEND;VALUE=DATE-TIME:20080424T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0896@ictp.it
DESCRIPTION:Although the existence of black-holes has been indirectly prov
 en on astrophysical grounds\, no experimental evidence of their slow but r
 elentless evaporation into Hawking radiation has been obtained yet.  In th
 e present talk we report numerical simulations of a condensed matter syste
 m which shares many properties with gravitational black-holes\, in particu
 lar the emission of a Hawking radiation: a horizon is created in a moving 
 cloud of ultracold atoms in the nanoKelvin range where atoms behave in a c
 oherent way as a Bose-Einstein condensate\, and the presence of Hawking ra
 diation is inferred from peculiar correlations of the quantum fluctuations
  of the atomic density.\n\n//indico.ictp.it/event/a0896/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0896/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Statistical mechani
 cs of flux distribution in metabolic networks"\n
DTSTART;VALUE=DATE-TIME:20080429T113000Z
DTEND;VALUE=DATE-TIME:20080429T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0897@ictp.it
DESCRIPTION:In recent years we have assisted to a big breakthrough in syst
 em biology\,  the interdisciplinary field that studies the biological prob
 lems going beyond the single biomolecular framework with the description o
 f the intertwined reactions between the constituent of the cell in terms o
 f networks.\nIn this talk we study the problem of flux distribution in met
 abolic networks by statistical mechanics methods.  We will first derive th
 e most probable flux distribution with intermediate metabolites at steady 
 state secondly we will study the flux distribution close to optimal biomas
 s production.  Analytical tractability of the models is possible if the pr
 oblems are defined over random graphs with the same degree distribution of
  the real metabolic networks.  The flux distribution close to the optimal 
 biomass production develops a fat tail with power-law exponent independent
  on the structure of the underline network in perfect agreement with bioin
 foarmatics methods and in qualitative agreement with experiments.  To solv
 e these problems we will introduce a Gaussian Replica Symmetric Ansatz val
 id for quadratic models defined on continuous variables refined on the rea
 l axis\, and a new method for study cavity equations on continuous variabl
 es close to a critical point.\n\n//indico.ictp.it/event/a0897/
LOCATION:SISSA Main Bldg.-Lecture Room 'D'
URL://indico.ictp.it/event/a0897/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Superfrustruation o
 f lattice fermions"
DTSTART;VALUE=DATE-TIME:20080507T113000Z
DTEND;VALUE=DATE-TIME:20080507T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0898@ictp.it
DESCRIPTION:The term superfrustration refers to massive ground state degen
 eracy in supersymmetric lattice models for itinerant fermions with strong 
 repulsive interactions\, in dimension D>1.  In general\, quantum phases of
  lattice fermions are hard to track\, due to lack of analytic methods and 
 fundamental difficulties in numerical analysis.  I will show how supersymm
 etry improves this situation and leads to exact results on the number and 
 nature of quantum gound states.  Superfrustration is established by showin
 g that on a variety of 2D lattices the supersymmetric model has extensive 
 ground state entropy. For the 2D square lattice I demonstrate the existenc
 e of critical edge excitations.\n\n//indico.ictp.it/event/a0898/
LOCATION:SISSA Main Bldg.\, Lecture Room 'D'
URL://indico.ictp.it/event/a0898/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Finite- temperature
  lineshapes in gapped quantum spin chains"\n
DTSTART;VALUE=DATE-TIME:20080513T113000Z
DTEND;VALUE=DATE-TIME:20080513T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08100@ictp.it
DESCRIPTION:We consider the finite-temperature dynamical suscepibility\, X
 (T)\, of gapped quantum spin chains such as the integer spin Heisenberg mo
 del and the transverse field Ising model.  At zero temperature  X  in thes
 e models is dominated by a delta-function line arising from the coherent p
 ropagation of single particle modes.  Using methods of integrable quantum 
 field theory we determine the evolution of the lineshape at low temperatur
 es.  We show that the line shape is in general asymmetric in energy.  We d
 iscuss the application of our results to inelastic neutron scattering expe
 riments on gapped spin chain systems such as YBaNiO_5.\n\n//indico.ictp.it
 /event/a08100/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08100/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: \nSeries of lectures
  on: 'Singularities and asymptotics'\nFirst lecture\n"Tsunami asymptotics"
 \n\n
DTSTART;VALUE=DATE-TIME:20080520T100000Z
DTEND;VALUE=DATE-TIME:20080520T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08106@ictp.it
DESCRIPTION:For most of their propagation\, tsunamis are linear dispersive
  waves whose speed is limited by the depth of the ocean and which can be r
 egarded as diffraction-decorated caustics in spacetime. For constant depth
 \, uniform asymptotics gives a very accurate compact description of the ts
 unami profile generated by an arbitrary initial disturbance. Vartiations i
 n depth can focus tsunamis onto cusped caustics\, and this ‘singularity 
 on a singularity’ constitutes an unusual diffraction problem\, whose sol
 ution indicates that focusing can amplify the tsunami energy by an order o
 f magnitude.\n\n//indico.ictp.it/event/a08106/
LOCATION:SISSA Main Bldg.\, Room 'D'
URL://indico.ictp.it/event/a08106/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: \nSeries of lectures
  on: 'Singularities and asymptotics'\nFirst lecture\n"Tsunami asymptotics"
 \n\n
DTSTART;VALUE=DATE-TIME:20080520T100000Z
DTEND;VALUE=DATE-TIME:20080520T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08107@ictp.it
DESCRIPTION:For most of their propagation\, tsunamis are linear dispersive
  waves whose speed is limited by the depth of the ocean and which can be r
 egarded as diffraction-decorated caustics in spacetime. For constant depth
 \, uniform asymptotics gives a very accurate compact description of the ts
 unami profile generated by an arbitrary initial disturbance. Vartiations i
 n depth can focus tsunamis onto cusped caustics\, and this ‘singularity 
 on a singularity’ constitutes an unusual diffraction problem\, whose sol
 ution indicates that focusing can amplify the tsunami energy by an order o
 f magnitude.\n\n//indico.ictp.it/event/a08107/
LOCATION:SISSA Main Bldg.\, Room 'D'
URL://indico.ictp.it/event/a08107/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Quantum physics dilemm
 a"
DTSTART;VALUE=DATE-TIME:20080521T150000Z
DTEND;VALUE=DATE-TIME:20080521T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08105@ictp.it
DESCRIPTION:Through the development of quantum physics\, there was deep co
 ntradiction in the concepts of understanding the quantum outcome data.  Bo
 hr-Heisenberg interpretation depends on nonlocality and indeterminism and 
 the effect of measuring instrument\, Einstein-Schrödinger and others refu
 sed these interpretations and concentrated on reality and locality.  Who a
 re right and who are wrong? Up to nowadays no clear decision/ideas in spit
 e of the very expensive sophisticated apparatus used to solve this dilemma
  and to find the basis of Quantum Physics.  The evidences of polarization\
 , entanglement and teleportation all gave scattered results\, especially w
 hen repeated.  What is the role of consciousness in measurement?\nAs Aspec
 t put it:" our conclusion is more a question of taste then logic"\, while 
 Aspelmeyer says\, nonlocality is not enough to save realism from quantum t
 heory.\nSo do we go to a compromise and accept both ideas or concepts?! Th
 at both are right? each in his field of experience.\n\n//indico.ictp.it/ev
 ent/a08105/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08105/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Modeling th
 e two-dimensional electron gas in solid state devices"\n
DTSTART;VALUE=DATE-TIME:20080522T100000Z
DTEND;VALUE=DATE-TIME:20080522T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08108@ictp.it
DESCRIPTION:The electron gas (EG)\, a collection of point charges moving i
 n a homogeneous neutralizing background\, provides a far reaching paradigm
  underlying our current understanding of electronic systems.  Nowadays\,  
 quasi two-dimensional electron gases of exceedingly high mobility are rout
 inely available in the best laboratories around the world.  This allows fo
 r the experimental investigation of the two-dimensional electron gas  (2DE
 G) in the strong coupling regime\, where the interplay between interaction
  and disorder scattering has unexpected effects\, such as an apparent meta
 l to insulator transition (MIT) which has attracted a considerable experim
 ental and theoretical interest.  Evidently\, fine details of the devices h
 osting the quasi 2DEG play an important role in determining its properties
  and should be accounted for by theory. In actual solid-states realization
 s the 2DEG (i) has a finite transverse thickness\, (ii) suffers scattering
  by a number of sources (scattering which in fact determines its mobility)
 \, and depending on the system (iii)  occupies one or two valleys\; moreov
 er\, (iv) in certain AlAs quantum wells it may have an in plane anisotropi
 c kinetic energy (mass tensor).  A property of the 2DEG that has recently 
 received a lot of attention in connection with the MIT is the spin suscept
 ibility χs. This measures the linear response of the electrons to an appl
 ied magnetic field that couples to the electron spin\, causing a net spin 
 polarization. We demonstrate that the EG model is perfectly capable of des
 cribing the available experimental evidence for  χs once two conditions a
 re met:  relevant device details are included in the theoretical descripti
 on and strong correlation effects are dealt with by a sufficiently accurat
 e technique\, such as quantum Monte Carlo simulations (QMC).  In particula
 r\,  we show that a perturbative account of disorder\, based on the  QMC p
 redictions for the clean interacting 2DEG\, yields for two-valley systems 
 a divergence of χs with lowering the density in excellent agreement with 
 the available  experimental evidence for Si-MOSFETs.\n\n//indico.ictp.it/e
 vent/a08108/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08108/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar:\nSeries of lectures 
 on: 'Singularities and asymptotics'\nSecond lecture\n"Conical diffraction:
  Imaging Hamilton's diabolical point"\n
DTSTART;VALUE=DATE-TIME:20080522T133000Z
DTEND;VALUE=DATE-TIME:20080522T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08113@ictp.it
DESCRIPTION:The transformation of a narrow beam into a hollow cone when in
 cident along the optic axis of a biaxial crystal\, predicted by Hamilton i
 n 1832\, created a sensation when observed by Lloyd soon afterwards. It wa
 s possibly the first prediction of a qualitatively new phenomenon using ma
 thematics\, the first application of the concept of phase space\, and the 
 prototype of the conical intersections now popular in quantum chemistry. B
 ut the fine structure of the light cone contains many subtle features\, sl
 owly revealed by experiment\, whose definitive explanation\, involving new
  mathematical asymptotics\, has been achieved only recently\, along with d
 efinitive experimental test of the theory. Radically different phenomena\,
  being intensively studied now\, arise when chirality and absorption are i
 ncorporated in addition to biaxiality.\n\n//indico.ictp.it/event/a08113/
LOCATION:Lecture room 'D'\, SISSA Main Bldg.
URL://indico.ictp.it/event/a08113/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: \nSeries of lectures
  on: 'Singularities and asymptotics'\nThird lecture\n"Polarization fingerp
 rints in the clear blue sky"\n\n
DTSTART;VALUE=DATE-TIME:20080527T100000Z
DTEND;VALUE=DATE-TIME:20080527T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08114@ictp.it
DESCRIPTION:Daylight is polarized\, the strength being greatest at points 
 in the sky at right angles to the sun\, and zero at four points: above and
  below the sun and anti-sun. The zero-polarization points are ‘fingerpri
 nt’ singularities\, around which the polarization direction makes a half
 -turn. Using elementary singularity theory\, the polarization pattern acro
 ss the whole sky can be described in a way that fits recent observations w
 ith an accuracy comparable to that of conventional elaborate multiple-scat
 tering calculations. This recent work is a contribution to a story that st
 arted in 1817 and has been central to our understanding of polarized light
 .\n\n//indico.ictp.it/event/a08114/
LOCATION:ICTP Leonardo da Vinci Building Lecture Room B
URL://indico.ictp.it/event/a08114/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: \nSeries of lectures
  on: 'Singularities and asymptotics'\nFourth lecture\n"Optical vorticultur
 e"\n
DTSTART;VALUE=DATE-TIME:20080529T140000Z
DTEND;VALUE=DATE-TIME:20080529T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08117@ictp.it
DESCRIPTION:After reviewing the history\, beginning in the 1660s\, of line
 s of phase and polarization singularity in light and other waves\,  I will
  describe our present understanding of their geometry\, and several recent
  applications: to spiral phase plates (vortex choreography)\, vortex knots
  and links\, ubiquity of vortices in interferometers\, and quantum cores o
 f the singularities.\n\n//indico.ictp.it/event/a08117/
LOCATION:ICTP Leonardo da Vinci Building Lecture Room B
URL://indico.ictp.it/event/a08117/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: \nSeries of lectures
  on: 'Singularities and asymptotics'\nFifth lecture\n"Two by two"\n
DTSTART;VALUE=DATE-TIME:20080604T140000Z
DTEND;VALUE=DATE-TIME:20080604T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08118@ictp.it
DESCRIPTION:A tutorial account of families of 2x2 matrices labelled by sev
 eral parameters will concentrate on the neighbourhood of degeneracies. The
  emphasis will be on the differences between hermitian and nonhermitian ma
 trices. Physical phenomena where such degeneracies play a crucial role wil
 l be described.\n\n//indico.ictp.it/event/a08118/
LOCATION:ICTP Leonardo da Vinci Building Lecture Room B
URL://indico.ictp.it/event/a08118/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Growing length scal
 es\, configurational entropy and dynamics in glass forming liquids"\n
DTSTART;VALUE=DATE-TIME:20080604T100000Z
DTEND;VALUE=DATE-TIME:20080604T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08119@ictp.it
DESCRIPTION:The relationship between dynamics\, a growing length scale ass
 ociated with cooperatively rearranging regions\, and configurational entro
 py underlie the Adam-Gibbs theory of dynamics in glass forming liquids.\nW
 hile the Adam-Gibbs relation between relaxation times and configurational 
 entropy has been widely employed to rationalize experimental and computer 
 simulation data\, attempts to directly study the length scales associated 
 with cooperatively rearranging regions have been relatively few. Fresh imp
 etus in this direction comes from recent studies of spatially heterogeneou
 s dynamics\, wherein analysis of spatial correlations of the mobility of p
 articles allows estimation of a dynamical length.  Finite size scaling is 
 employed in the present work to evaluate a dynamical length scale in a mod
 el glass forming liquid\, whose relationship to relaxation times and confi
 gurational entropy are examined.  Comparison with theoretical predictions 
 reveal partial agreement\, and yield surprises that require further theore
 tical analysis to resolve.  The configurational entropy is found to determ
 ine relaxation times for all temperatures and system sizes studied through
  the Adam-Gibbs relation\, but the configurational entropy of cooperativel
 y rearranging regions grows as the temperature is lowered\, contrary to th
 e assumptions of Adam-Gibbs theory.\n\n//indico.ictp.it/event/a08119/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08119/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: \nSeries of lectures
  on: 'Singularities and asymptotics'\nSixth lecture\n"Boundary-varying bou
 ndary conditions: \nThe Dirichlet singularity"\n
DTSTART;VALUE=DATE-TIME:20080605T140000Z
DTEND;VALUE=DATE-TIME:20080605T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08120@ictp.it
DESCRIPTION:Waves in a two-dimensional domain with Robin (mixed) boundary 
 conditions that vary smoothly along the boundary exhibit unexpected phenom
 ena. If the variation includes a ‘D point’ where the boundary conditio
 n is Dirichlet (vanishing wavefunction)\, the system is singular. For a ci
 rcle billiard\, the boundary condition fails to determine a discrete set o
 f levels\, so the spectrum is continuous. For a diffraction grating define
 d by periodically-varying boundary conditions on the edge of a half-plane\
 , the phase of a diffracted beam amplitude remains undetermined.  In both 
 cases\, the  wavefunction on the boundary has a singularity at a D point\,
  described by the polylogarithm function.\n\n//indico.ictp.it/event/a08120
 /
LOCATION:ICTP Leonardo da Vinci Building Lecture Room B
URL://indico.ictp.it/event/a08120/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar:\n\nSeries of lecture
 s on: 'Singularities and asymptotics'\n\nSeventh lecture\n\n" Quantum mech
 anics\, chaos\, and the music of the primes "\n(duration 2 hours)\n
DTSTART;VALUE=DATE-TIME:20080610T100000Z
DTEND;VALUE=DATE-TIME:20080610T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08125@ictp.it
DESCRIPTION:The Riemann hypothesis can be interpreted as stating that the 
 prime numbers contain 'music'\, whose component frequencies are the Rieman
 n zeros.  The question "Frequencies of what?" leads to tantalizing connect
 ions with the energy levels of quantum systems whose corresponding classic
 al motion is chaotic.  At the level of statistics\, predictions for the Ri
 emann zeros based on semiclassical quantum asymptotics (with primes as per
 iods of classical trajectories) have reached a high degree of accuracy and
  refinement.  For the zeros themselves\, the Riemann-Siegel formula and it
 s improvements lead to new ways of calculating quantum levels.\n\n//indico
 .ictp.it/event/a08125/
LOCATION:ICTP Leonardo da Vinci Building Lecture Room B
URL://indico.ictp.it/event/a08125/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Novel aspects in \nthe
 rmodynamics of fuzzy interfaces"\n
DTSTART;VALUE=DATE-TIME:20080611T150000Z
DTEND;VALUE=DATE-TIME:20080611T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08124@ictp.it
DESCRIPTION:For decades the behavior of Tolman's length (a curvature-corre
 ction coefficient in the surface tension [1]) has remained one of the most
  controversial issues in mesoscopic thermodynamics of fluids. Moreover\, i
 t was commonly believed that Tolman’s length played no significant role 
 in practice. However\, it was recently shown [2] that there is a thermodyn
 amic relation between Tolman’s length and the thickness of the interface
  on the one hand and the shape of the fluid-phase coexistence on the other
  hand. In particular\, it was shown that Tolman's length strongly diverges
  at the critical point of fluids with the amplitude that depends on the de
 gree of asymmetry in fluid-phase coexistence. The critical divergence of T
 olman’s length is universal\, originating from the mesoscopic critical f
 luctuations. The fluctuations make the fluid interface fuzzy and significa
 ntly change the shape of the phase coexistence. In symmetric systems\, suc
 h as the lattice gas\, the curvature correction to the interfacial tension
  vanishes. The divergence of the curvature correction to the interfacial t
 ension is especially pronounced in polymer solutions and asymmetric polyme
 r blends. Tolman’s length in polymer solutions may become as large as th
 e thickness of the smooth interface\, thus playing a significant role in t
 he behavior of polymer microdroplets and polymer fluids in porous media. \
 n\n[1] R. C. Tolman\, J. Chem Phys. 1949\, 17\, 333.\n[2] M. A. Anisimov\,
  Phys. Rev. Lett. 2007\, 98\, 035702.\n\n//indico.ictp.it/event/a08124/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08124/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar:\nSeries of lectures 
 on: 'Singularities and asymptotics'\n\nEighth lecture\n\n" Three recent re
 sults on asymptotics of oscillations "\n
DTSTART;VALUE=DATE-TIME:20080611T100000Z
DTEND;VALUE=DATE-TIME:20080611T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08126@ictp.it
DESCRIPTION:The results are separate\, and apparently paradoxical\, and ha
 ve implications for physics.  First\, when two exponentials compete\, thei
 r interference can be dominated by the contribution with smaller exponent.
   Second\, repeated differentiation of almost all functions in a wide clas
 s generates trigonometric oscillations (‘almost all functions tend to co
 sx’).  Third\, it is possible to find band-limited functions that oscill
 ate arbitrarily faster than their fastest Fourier component (‘superoscil
 lations’).\n\n//indico.ictp.it/event/a08126/
LOCATION:ICTP Leonardo da Vinci Building Lecture Room B
URL://indico.ictp.it/event/a08126/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar:\nSeries of lectures 
 on: 'Singularities and asymptotics'\n\nNinth (and last)  lecture\n\n" Maki
 ng light of mathematics "\n( a nontechnical talk\, suitable for nonscienti
 sts )\n
DTSTART;VALUE=DATE-TIME:20080612T140000Z
DTEND;VALUE=DATE-TIME:20080612T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08127@ictp.it
DESCRIPTION:Many ‘mathematical phenomena’ find application and sometim
 es spectacular physical illustration in the physics of light.  Concepts su
 ch as fractals\, catastrophe theory\, knots\, infinity\, zero\, and even w
 hen 1+1 fails to equal 2\, are needed to understand rainbows\, twinkling s
 tarlight\, sparkling seas\, oriental magic mirrors\, and simple experiment
 s on interference\, polarization and focusing.  The lecture is strongly vi
 sual\, and nontechnical\, though the concepts are subtle.\n\n//indico.ictp
 .it/event/a08127/
LOCATION:SISSA Main Bldg.
URL://indico.ictp.it/event/a08127/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar:\n"The instability of
  coherent risk measures"
DTSTART;VALUE=DATE-TIME:20080617T100000Z
DTEND;VALUE=DATE-TIME:20080617T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08129@ictp.it
DESCRIPTION:It is shown that the axioms for coherent risk measures imply t
 hat whenever a dominant portfolio can be formed on a given sample (which h
 appens with finite probability even for large samples)\, then portfolio op
 timization cannot be performed under any coherent measure on that sample\,
  and the risk measure diverges to minus infinity.  This instability was fi
 rst discovered on the special example of Expected Shortfall which is used 
 here both as an illustration and as a springboard for generalization.\n\n/
 /indico.ictp.it/event/a08129/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08129/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Two-state model for two 
 different molecular motors: Monomeric helicase and KIF1A"
DTSTART;VALUE=DATE-TIME:20080626T100000Z
DTEND;VALUE=DATE-TIME:20080626T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08134@ictp.it
DESCRIPTION:Biological molecular motors are the enzymes which play crucial
   roles in different cellular and developmental processes in a living cell
 .\n Helicases are molecular motors that unwind double-stranded nucleic aci
 ds  such as DNA and RNA. KIF1A is a single headed kinesin motor that takes
  part in intracellular transport along microtubule from cell center to cel
 l  periphery.  They both perform mechanical work by hydrolyzing ATP.\nIn t
 he flashing ratchet picture\, the motor proteins switch between two  state
 s: one where the motor is tightly bound to the track and another  where th
 e motor is weakly bound and can diffuse along the track.  This  flashing r
 atchet mechanism can be found in these two motors.  In this talk I will di
 scuss the speed of unwinding of the double stranded nucleic acid and fluct
 uations around the average unwinding velocity of the monomeric  helicase. 
 Then I will emphasize the effects of mechanochemistry  and steric interact
 ions on the KIF1A traffic.\n\n//indico.ictp.it/event/a08134/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08134/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Statistical physics in f
 racture"
DTSTART;VALUE=DATE-TIME:20080703T100000Z
DTEND;VALUE=DATE-TIME:20080703T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08200@ictp.it
DESCRIPTION:In this talk I review two current problems where statistical m
 echanics and fracture meet (see Adv. Phys. 55\, 349 (2006).  The first is 
 the so-called size effect\, which measures the strength of a sample as a f
 unction of its size.  This can be addressed both in the traditional FSS se
 nse - becoming an extremal statistics problem - and in the presence of one
  defect\, a notch (Phys. Rev. Lett. 100\,  055502 (2008)).  I present some
  recent results on the application of scaling theory and extensive simulat
 ions of simple fracture models to illustrate the fundamental role of disor
 der here.  The second problem is the creep of a fracture line. I discuss e
 xperiments done at HUT using the so-called peel-in-nip geometry to split p
 aper in two (Phys. Rev. Lett. 99\, 145504 (2007)) in the creep setup\, or 
 under a constant external force.  The scenario can be used to test fundame
 ntal results in the theory of elastic manifolds in random media\, in parti
 cular the depinning of lines with long-range elasticity.  Listening to the
  dynamics via acoustic emission measurements allows to look at the tempora
 l dynamics with high accuracy.\n\n//indico.ictp.it/event/a08200/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08200/
END:VEVENT
BEGIN:VEVENT
SUMMARY:INFORMAL SEMINAR  on  Statistical Physics: " Who is keeping you in
  that community? "
DTSTART;VALUE=DATE-TIME:20080717T100000Z
DTEND;VALUE=DATE-TIME:20080717T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08210@ictp.it
DESCRIPTION:It is a common experience that groups of people with tight int
 er-relations can be easily formed or dissolved. These groups are not howev
 er restricted to social environments\; they can be found in systems rangin
 g from protein interaction networks to the Web and can be seen as manifest
 ations of complexity. Within the framework of graph theory such groups are
  known as clusters or communities and many techniques have been proposed t
 o detect them.\n\nIn this talk I will show that a recently introduced infe
 rence method on networks is able not only to determine clusters but also t
 o measure the extent to which each element influences the group membership
  of its neighbors. We demonstrate the generality and relevance of this inf
 ormation-based hierarchy with several real-world examples. This is joint w
 ork with Jose Javier Ramasco of ISI Torino.\n\n//indico.ictp.it/event/a082
 10/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08210/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Role of ini
 tial conditions in ageing of quenched systems"\n
DTSTART;VALUE=DATE-TIME:20080724T100000Z
DTEND;VALUE=DATE-TIME:20080724T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08212@ictp.it
DESCRIPTION:Ageing phenomenon is observed in slowly relaxing nonequilibriu
 m systems.\nExamples not only include complex glassy systems\, but also si
 mple statistical mechanics systems when rapidly quenched in temperature.  
 These quenched systems usually show scaling properties and universal behav
 iour while ageing I shall discuss some of these out-of-equilibrium propert
 ies in an exactly solvable example\, long-range spherical model\, and show
  how the ageing classes depend on classes of initial conditions.\n\n//indi
 co.ictp.it/event/a08212/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08212/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR on\n\nDisorder and strong electron correlations: "Role of 
 initial conditions in \nageing of quenched systems"\n\n
DTSTART;VALUE=DATE-TIME:20080730T050000Z
DTEND;VALUE=DATE-TIME:20080730T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08216@ictp.it
DESCRIPTION:Ageing phenomenon is observed in slowly relaxing nonequilibriu
 m systems.\nExamples not only include complex glassy systems\, but also si
 mple statistical mechanics systems when rapidly quenched in temperature.  
 These quenched systems usually show scaling properties and universal behav
 iour while ageing I shall discuss some of these out-of-equilibrium propert
 ies in an exactly solvable example\, long-range spherical model\, and show
  how the ageing classes depend on classes of initial conditions.\n\n//indi
 co.ictp.it/event/a08216/
LOCATION:SISSA - Lecture Room D
URL://indico.ictp.it/event/a08216/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"The statist
 ics of the work done in a quantum quench"\n
DTSTART;VALUE=DATE-TIME:20080925T100000Z
DTEND;VALUE=DATE-TIME:20080925T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08239@ictp.it
DESCRIPTION:A quantum quench is a rapid change in time of a control parame
 ter in the hamiltonian describing a quantum\, correlated many body system.
   The physics of this paradigmatic nonequilibrium process\, which has been
  realized recently in the context of cold atoms\, is of particular interes
 t in quantum critical systems. In this talk I will discuss a fundamental w
 ay to characterize these processes using basic thermodynamic variables and
  looking at their statistics. Focusing on the statistics of\nthe work done
  in a quantum quench I will first elucidate the relation between the proba
 bility distribution of the work\, quantum Jarzynski equalities\, and the L
 oschmidt echo\, a quantity that emerges usually in the context of dephasin
 g. Using this connection\, I will then characterize the statistics of the 
 work done on a quantum Ising chain by quenching locally\nor globally the t
 ransverse field\, showing that for local quenches starting at criticality\
 , the probability distribution of the work displays an interesting edge si
 ngularity.\n\nRef: Alessandro Silva\, Phys. Rev. Lett. 101\, 120603 (2008)
 .\n\n//indico.ictp.it/event/a08239/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08239/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:  "Super-insu
 lator: What is it?"
DTSTART;VALUE=DATE-TIME:20081002T100000Z
DTEND;VALUE=DATE-TIME:20081002T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08243@ictp.it
DESCRIPTION:We analyze the recent experiments in InO films which show a dr
 amatic jump in the resistance as a function of the applied voltage.  These
  experiments provoke speculations about a "super-insulator" as a "new stat
 e of matter".  We show that all the qualitative details of recent experime
 nts and many\nquantitative estimations follow from the model that assumes 
 lack of equilibrium  between electron system and phonon bath which arises 
 at low enough temperatures at a finite voltage bias.\n\n//indico.ictp.it/e
 vent/a08243/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08243/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: "Density Functional and
  Dynamical Mean-Field Theory (DFT+DMFT) method and its applications to cor
 relation effects in electronic structure of real materials"
DTSTART;VALUE=DATE-TIME:20081008T150000Z
DTEND;VALUE=DATE-TIME:20081008T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08250@ictp.it
DESCRIPTION:Dynamical Mean-Field Theory (DMFT) is a powerful tool to study
  Coulomb correlations. To use it for real materials it should be combined 
 with Density Functional Theory (DFT) methods. Wannier functions are used a
 s localized orbitals basis to define Hamiltonian parameters. Coulomb inter
 action parameters are obtained in “constrained DFT” calculations.\nDFT
 +DMFT method was applied to a number of narrow-band materials where correl
 ation effects result in anomalous physical properties:\n- Strongly correla
 ted metals SrVO3 \n- Metal-insulator transition in V2O3\n- Heavy fermions 
 in d-system Li2VO4\n- Charge transfer insulator NiO\n- Metal insulator tra
 nsition with pressure in MnO  \n- Correlated covalent insulators FeSi and 
 FeSb2\n- Novel superconductor LaOFeAs\n- Jahn-Teller distortions in KCuF3\
 n- f-electrons localization in Ce\n\n//indico.ictp.it/event/a08250/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08250/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Ab initio 
 electronic structure\, \nballistic conductance\, and magnetism of \ntransi
 tion metal nanocontacts"\n
DTSTART;VALUE=DATE-TIME:20081009T100000Z
DTEND;VALUE=DATE-TIME:20081009T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08252@ictp.it
DESCRIPTION:Metallic nanocontacts consisting of just a single monatomic wi
 re (atomic chain) connecting two macroscopic electrodes can be now fabrica
 ted\, imaged\, and explored by means of various techniques such as scannin
 g tunneling microscopy or mechanically controllable break junctions. We pr
 esent the first  principles density functional theory study of such nanowi
 re contacts making a  special emphasis on the interplay between their magn
 etic and electron transport properties. We show the results for ferromagne
 tic Ni nanocontacts  and for Pt nanocontacts where the one-dimensional mon
 atomic wires (unlike to the bulk) were recently shown to develop magnetism
 .\n\n//indico.ictp.it/event/a08252/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08252/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Subtle prob
 lems of  one-dimensional localization:  Devil's staircase of statistical a
 nomalies "\n
DTSTART;VALUE=DATE-TIME:20081016T100000Z
DTEND;VALUE=DATE-TIME:20081016T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08254@ictp.it
DESCRIPTION:It is shown that in the old and celebrated problem of one-dime
 nsional localization on a lattice with random on-site energies the joint p
 robability distribution (JPD) of amplitudes and phases of random eigenfunc
 tion exhibits an anomaly at any rational filling factor. The principal ano
 maly at half-filling is described by the transfer-matrix equation with the
  two-dimensional (amplitude and phase) internal space and an explicit depe
 ndence on both co-ordinates. We show that the  zero mode variant of this e
 quation is exactly solvable and find the unique solution for the JPD.\n\n/
 /indico.ictp.it/event/a08254/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08254/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Real-time 
 diagrammatic Monte Carlo for nonequilibrium quantum transport"
DTSTART;VALUE=DATE-TIME:20081022T100000Z
DTEND;VALUE=DATE-TIME:20081022T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08258@ictp.it
DESCRIPTION:We propose a novel approach to nonequilibrium real-time dynami
 cs of quantum impurities models coupled to biased non-interacting leads\, 
 such as those relevant to quantum transport in nanoscale molecular devices
 .  The method is based on a Diagrammatic Monte Carlo sampling of the real-
 time perturbation theory along the Keldysh contour. We benchmark the metho
 d on a non-interacting resonant level model and\, as a first non-trivial a
 pplication\, we study zero temperature non-equilibrium transport through a
  vibrating molecule.\n\n//indico.ictp.it/event/a08258/
LOCATION:ICTP
URL://indico.ictp.it/event/a08258/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Non-equilib
 rium Luttinger liquid:  Zero-bias anomaly and dephasing"\n
DTSTART;VALUE=DATE-TIME:20081106T100000Z
DTEND;VALUE=DATE-TIME:20081106T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08260@ictp.it
DESCRIPTION:A one-dimensional system of interacting electrons out of equil
 ibrium is studied in the framework of the Luttinger liquid model. We analy
 ze several setups and develop a theory of tunneling into such systems.  A 
 remarkable property of the problem is the absence of relaxation in energy 
 distribution functions of left- and right-movers\, yet the presence of the
  finite dephasing rate due to electron-electron scattering\, which smears 
 zero-bias-anomaly singularities in the tunneling density.\n\n//indico.ictp
 .it/event/a08260/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08260/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Dissipative
  dynamics in almost integrable system or life-time of dark solitons"\n
DTSTART;VALUE=DATE-TIME:20081113T100000Z
DTEND;VALUE=DATE-TIME:20081113T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08270@ictp.it
DESCRIPTION:The exact quantum excitations of weakly interacting one dimens
 ional Bose gas can be observed by their semi-classical counterpart\, a dar
 k soliton.  Dark solitons are protected from decay by integrability and ha
 ve infinite lifetime.   In this talk I shall discuss possible source of no
 n-integrability in realistic systems and show how solitons acquire a finit
 e life-time.\n\n//indico.ictp.it/event/a08270/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08270/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Inference of effect
 ive interactions between retinal neurons"\n
DTSTART;VALUE=DATE-TIME:20081118T113000Z
DTEND;VALUE=DATE-TIME:20081118T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08268@ictp.it
DESCRIPTION:Multi-electrodes techniques allow to register the simultaneous
  activity of tens of ganglion cells in the vertebrate retina for several h
 ours.  Recently a low-dimensional representation of this activity was prop
 osed\, based on the notion of effective interactions. I will present how t
 hese couplings can be efficiently inferred in two models (Ising and Integr
 ate-and-Fire). The dependence of the interactions on the visual stimulus\,
  and their spatial structure will be discussed.\n\n//indico.ictp.it/event/
 a08268/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08268/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Topological
  objects in  two-gap superconductor"\n
DTSTART;VALUE=DATE-TIME:20081120T100000Z
DTEND;VALUE=DATE-TIME:20081120T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08272@ictp.it
DESCRIPTION:We discuss topological objects\, in particular the non-Abrikos
 ov vortex and the magnetic knot made of the twisted non-Abrikosov vortex\,
  in two-gap superconductor.  We show that there are two types of non-Abrik
 osov vortex in Ginzburg-Landau theory of two-gap superconductor\, the D-ty
 pe which has no concentration of the condensate at the core and the N-type
  which has a non-trivial profile of the condensate at the core\, under a w
 ide class of realistic interaction potential. Furthermore\, with the Josep
 hson interaction we get the vortex molecule which is different from the ax
 isymmetric vortex.\n\n//indico.ictp.it/event/a08272/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08272/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: " Braid construction
  for low-leakage topological quantum computation "\n
DTSTART;VALUE=DATE-TIME:20081124T113000Z
DTEND;VALUE=DATE-TIME:20081124T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08275@ictp.it
DESCRIPTION:A topological quantum computer encodes quantum information in 
 a topologically protected Hilbert space of non-Abelian anyons. Braiding no
 n-Abelian anyons in space-time leads to robust quantum information process
 ing. In this talk\, I will first give a brief overview of the emergence an
 d braiding of anyons in fractional quantum Hall systems. Then\, I will use
  Fibonacci anyons to discuss braid (or quantum gate) construction toward u
 niversal topological quantum computation\, with focus on avoiding leakage 
 errors in braid construction. Such considerations result in high-accuracy 
 low-leakage quantum gates for topological quantum computation.\n\n//indico
 .ictp.it/event/a08275/
LOCATION:Lecture Room 'D'\, SISSA Bldg.
URL://indico.ictp.it/event/a08275/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Interplay b
 etween Kondo effect and  Rashba precession in magnetic field"\n
DTSTART;VALUE=DATE-TIME:20081127T100000Z
DTEND;VALUE=DATE-TIME:20081127T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08277@ictp.it
DESCRIPTION:The influence of Thomas-Rashba (TR) precession on the Kondo tu
 nneling through quantum dots is discussed.  It is shown that this precessi
 on is pertinent only at finite magnetic fields.  TR precession results in 
 peculiar anisotropy of effective g-factor and initiates dephasing of Kondo
  tunneling at low temperature\, which strongly depends on the magnitude an
 d direction of magnetic field.\n\n//indico.ictp.it/event/a08277/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08277/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Spectra of sparse r
 andom matrices and localization on random graphs"\n
DTSTART;VALUE=DATE-TIME:20081202T113000Z
DTEND;VALUE=DATE-TIME:20081202T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08278@ictp.it
DESCRIPTION:We compute the spectral density for ensembles of sparse symmet
 ric random matrices using replica. Our formulation of the replica-symmetri
 c ansatz shares the symmetries of the one suggested in a seminal paper by 
 Rodgers and Bray (symmetry with respect to permutation of replica / and/ r
 otation symmetry in the space of replica)\, but uses a different represent
 ation in terms of superpositions of Gaussians. It gives rise to a pair of 
 integral equations which can be solved by a stochastic population-dynamics
  algorithm. Remarkably our representation allows to identify pure-point co
 ntributions to the spectral density related to the existence of normalizab
 le eigenstates. Our approach is not restricted to matrices defined on grap
 hs with Poissonian degree distribution. Matrices defined on regular random
  graphs or on scale-free graphs\, are easily handled. We also look at matr
 ices with row constraints such as discrete graph Laplacians\, and at Rando
 m Schroedinger Operators defined on random graphs.  Our approach naturally
  allows to unfold the total density of states into contributions coming fr
 om vertices of different local coordination and an example of such an unfo
 lding is presented. Our results are well corroborated by numerical diagona
 lization studies of large finite random matrices.\n\n//indico.ictp.it/even
 t/a08278/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08278/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Nonequilibr
 ium kinetics of a disordered Luttinger liquid"\n
DTSTART;VALUE=DATE-TIME:20081204T100000Z
DTEND;VALUE=DATE-TIME:20081204T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08279@ictp.it
DESCRIPTION:We develop a kinetic theory for strongly correlated one-dimens
 ional electron systems  out of equilibrium\, within the framework of the L
 uttinger liquid model. In the absence  of disorder (backscattering off imp
 urities)\, the model is completely integrable and  as such exhibits no rel
 axation to equilibrium. We formulate a theoretical framework  to study rel
 axation processes due to the interplay of disorder and electron-electron i
 nteractions\, based on kinetic equations for electron and plasmon distribu
 tion functions. We calculate the rate of energy relaxation (equilibration)
  in a disordered Luttinger liquid\, relevant to the transport properties o
 f quantum wires at finite bias voltage. Remarkably\, for not too low tempe
 rature and bias\, the energy-relaxation rate is found to be given by the r
 ate of elastic scattering off disorder\, independent of the strength  of e
 lectron-electron interaction and temperature.\n\n//indico.ictp.it/event/a0
 8279/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08279/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Phase transitions i
 n the quantum conductance problem"\n
DTSTART;VALUE=DATE-TIME:20081209T113000Z
DTEND;VALUE=DATE-TIME:20081209T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08280@ictp.it
DESCRIPTION:Linear statistics on ensembles of random matrices occur freque
 ntly in many applications. We present a general method to compute probabil
 ity distributions of linear statistics for large matrix size N. This is\na
 pplied to the calculation of conductance and shot noise for ballistic scat
 tering in chaotic cavities\, in the limit of large number of open channels
 . The method is based on a mapping to a Coulomb gas problem in Laplace spa
 ce\, displaying phase transitions as the Laplace parameter is varied. As a
  consequence\, the sough distribution displays a central Gaussian region f
 lanked on both sides by non-Gaussian tails\, and weak non-analytical point
 s at the junction of the two regimes.\n\n//indico.ictp.it/event/a08280/
LOCATION:SISSA Main Bldg\, Lecture Room 'D'
URL://indico.ictp.it/event/a08280/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Transport 
 through superconducting junction of multiple one-dimensional quantum wires
 "
DTSTART;VALUE=DATE-TIME:20081211T100000Z
DTEND;VALUE=DATE-TIME:20081211T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08282@ictp.it
DESCRIPTION:We investigate transport properties of a superconducting junct
 ion of one-dimensional quantum wires. We include the effect of electron-el
 ectron interaction within the one-dimensional quantum wires using a weak i
 nteraction renormalization group (WIRG) procedure. Due to the proximity ef
 fect\, transport across the junction occurs via direct tunneling as well a
 s via crossed Andreev channel. We find that the fixed point structure of t
 his system is far more rich than the fixed point structure of a normal met
 al-superconductor (NS) junction\, where we only have two fixed points - th
 e fully insulating fixed point or the Andreev fixed point. Even a two wire
  system with a superconducting junction i.e. a normal metal-superconductor
 -normal metal (NSN) structure\, has non-trivial fixed points with intermed
 iate transmissions and reflections. We demonstrate possible scenarios for 
 production of pure spin current through such junctions and show that there
  are fixed points in the theory which correspond to the case of pure spin 
 current. We have also shown that (a) effects due to inclusion of electron-
 electron interaction induced back-scattering in the wire\, and (b) competi
 tion between the charge transport via the electron and hole channels acros
 s the junction give rise to a non-monotonic behavior of subgap conductance
  as a function of temperature.\n\n//indico.ictp.it/event/a08282/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08282/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Quantum impurities 
 out-of-equilibrium" 
DTSTART;VALUE=DATE-TIME:20081216T113000Z
DTEND;VALUE=DATE-TIME:20081216T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a08283@ictp.it
DESCRIPTION:We develop an exact non-perturbative framework to compute the 
 nonequilibrium steady state properties of quantum impurities connected to 
 leads subject to source-drain voltage.  We show that in the open system li
 mit the non-equilibrium physics is captured by eigenstates defined with bo
 undary conditions set by the leads. The eigenstates are current carrying a
 nd entropy producing\, with the dissipation inherent in the limit. We cons
 truct these eigenstates by means of a recently introduced Scattering (or O
 pen) Bethe Ansatz approach\, a generalization to nonequilibrium of the The
 rmodynamic (or Closed) Bethe Ansatz.  We compute the I(V) curve of the Int
 eracting Resonance Level and observe a Fermi Edge Singularity out of equil
 ibrium as the impurity level approaches resonance. We then apply the appro
 ach to the quantum dot (the nonequilibrium Anderson Impurity model) and co
 mpute the conductance G(V \; e_d)\, noting the formation of the Kondo peak
  as the gate voltage e_d is decreased\, and the peak destruction as the so
 urce-drain voltage V is increased.\n\n//indico.ictp.it/event/a08283/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a08283/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Algebraic propertie
 s of Grassmann and Clifford subalgebras related to spanning hyperforests"\
 n
DTSTART;VALUE=DATE-TIME:20090113T113000Z
DTEND;VALUE=DATE-TIME:20090113T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a092@ictp.it
DESCRIPTION:A supersymmetric theory with osp(1|2)-invariance can be used t
 o describe spanning (hyper-)forests on a given graph. In a sigma-model\, t
 he bosonic part of the superfield can be integrated out and the symmetry i
 s realized\nnon-linearly in the remaining Grassmann degrees of freedom.\nW
 e investigate the invariant osp(1|2) Grassmann and Clifford subalgebras. W
 e discover that\, given an arbitrary vertex ordering\, a basis of independ
 ent elements is given by terms labeled by non-crossing partitions\, respec
 tively of the vertices of the graph\, and of a doubling of this set.\nThe 
 invariant Clifford subalgebra is isomorphic to a Temperley--Lieb Algebra\,
  in a peculiar even/odd generalization.\nA relation involving four complex
  fermions plays a central role in the construction\, and disentangles the 
 only 4-set crossing partition as a linear combination of the other partiti
 ons with up to two blocks. This relation appears in different flavours\, a
 nd equivalence of the formulations is shown.\n\n//indico.ictp.it/event/a09
 2/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a092/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR:"Form factors in fini
 te volume and finite temperature correlators"
DTSTART;VALUE=DATE-TIME:20090120T113000Z
DTEND;VALUE=DATE-TIME:20090120T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a097@ictp.it
DESCRIPTION:I review recent work related to the volume dependence of matri
 x elements of local fields (form factors)\, giving a description valid to 
 all orders in inverse powers of the volume (i.e. only neglecting contribut
 ions that decay exponentially with volume). This method can be used to tes
 t exact solutions (derived using bootstrap methods in integrable models) a
 gainst numerical data obtained by solving the field theory in a truncated 
 state space\; it is also useful in extracting matrix elements from numeric
 al data such as those obtained from e.g. lattice field theory. Matrix elem
 ents with disconnected pieces require special attention. Such matrix eleme
 nts are important in computing finite temperature correlation functions. I
  give a new method for generating a low temperature expansion\, which is e
 valuated for the one-point function up to third order\, confirming a serie
 s expansion conjectured by Leclair and Mussardo. Time permitting\, I also 
 briefly show how the results can be extended to a situation with boundarie
 s.\n\n//indico.ictp.it/event/a097/
LOCATION:Lecture Room D-SISSA Main Building
URL://indico.ictp.it/event/a097/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: " Effective surface 
 tension and coarsening in models driven by interfacial noise "
DTSTART;VALUE=DATE-TIME:20090127T113000Z
DTEND;VALUE=DATE-TIME:20090127T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0911@ictp.it
DESCRIPTION:I review domain coarsening phenomena in the non-equilibrium dy
 namics of discrete spin models with Z_2 symmetry. Standard classifications
  distinguish between "curvature-driven" processes\, in which the interface
  motion is driven by surface tension (e.g. Glauber dynamics)\, and purely 
 diffusive processes driven by multiplicative noise at the interfaces (e.g.
  Voter model). There are evidences that slight changes of the microscopic 
 Voter-like rule (e.g. adding intermediate states) leads to the emergence o
 f an effective surface tension. We explain this phenomenon deriving a macr
 oscopic Langevin equation for these processes and studying it with field-t
 heoretic and numerical methods.\n\n//indico.ictp.it/event/a0911/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0911/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Three body physics 
 with ultracold atoms: the Efimov effect and P-wave Feshbach resonances for
  spin polarized fermions"
DTSTART;VALUE=DATE-TIME:20090203T113000Z
DTEND;VALUE=DATE-TIME:20090203T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0914@ictp.it
DESCRIPTION:In the first part of the talk I will very briefly review the b
 asic facts about scattering theory in the S-wave and P-wave channel. I wil
 l introduce the notions needed to describe low energy collisions in ultrac
 old atoms: scattering amplitude\, scattering length\, scattering volume\, 
 true range and effective range of the interaction. I will then review the 
 Efimov effect for a bosonic system.\nThe main part of the talk will be dev
 oted to the three-body problem for polarized fermions\, close to a P-wave 
 Feshbach resonance. I will present a two channel model useful to describe 
 the P-wave interaction. Through numerical and analytical solutions of the 
 model\, I obtain predictions for all the physical quantities relevant for 
 present experiments: low energy elastic and inelastic scattering propertie
 s\, existence and lifetime of weakly bound trimers\, atom loss rate throug
 h the three-body recombination mechanism. The model also excludes the pres
 ence of an Efimov effect in the P-wave channel.\nApplications and future d
 evelopments will conclude the talk.\n\n//indico.ictp.it/event/a0914/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a0914/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "How to find a diffi
 cult problem for a quantum computer"
DTSTART;VALUE=DATE-TIME:20090210T113000Z
DTEND;VALUE=DATE-TIME:20090210T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0917@ictp.it
DESCRIPTION:I will discuss generation of random instances of complete QMA 
 problems.\n\nThese are thought to be problems which are difficult to solve
  even on a quantum computer. This will lead us to study a class of disorde
 red Hamiltonians with some peculiar properties and to the hypothesis that 
 finding a difficult problem for a quantum computer might be a difficult ta
 sk.\n\n//indico.ictp.it/event/a0917/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0917/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on on Disorder and strong electron correlations: " "Time e
 volution of correlations in strongly interacting fermions and bosons"\n
DTSTART;VALUE=DATE-TIME:20090212T100000Z
DTEND;VALUE=DATE-TIME:20090212T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0918@ictp.it
DESCRIPTION:Using the adaptive time-dependent density matrix renormalizati
 on group\, we study the time evolution of strongly correlated bosonic and 
 fermionic systems on one-dimensional lattices pushed out of equilibrium. I
 n particular\, we investigate a system of interacting spinless fermions af
 ter a sudden change in the interaction strength and a system of soft- core
  bosons modeled by the Bose-Hubbard model released from a trapping box-pot
 ential. By considering the momentum distribution function of the bosonic s
 ystem\, we demonstrate the formation of (quasi-)coherent matter waves emer
 ging from an initial Mott insulating state over a wide range of the intera
 ction strength between the particles. In the fermionic system\, we find th
 e density correlations to exhibit a characteristic light-cone-like time ev
 olution which is representative of a ballistic transport of information. S
 uch behavior is observed both\nwhen quenching an insulator into the metall
 ic region and also when quenching within the insulating region\, but not  
 when a metallic state is quenched deep into the insulating regime. Instead
 \, stable domain walls in the density correlations emerge during the time 
 evolution\, consistent with the predictions of the Kibble-Zurek mechanism.
 \n\n//indico.ictp.it/event/a0918/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0918/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Relaxation dynamics
  of isolated many-body systems"\n
DTSTART;VALUE=DATE-TIME:20090217T113000Z
DTEND;VALUE=DATE-TIME:20090217T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0921@ictp.it
DESCRIPTION:If an isolated quantum-mechanical many-body system is suddenly
  forced out of thermal equilibrium\, does it relax to a new steady state o
 r does it keep oscillating?  How does the final state depend on the initia
 l state?  Recently it has become possible to investigate such fundamental 
 questions in experiments with ultracold atomic gases. Here we study two mo
 dels of interacting fermions\, the Falicov-Kimball model in dynamical mean
 -field theory [1] and a Hubbard chain with long-range hopping [2]. We obta
 in the exact real-time dynamics after a sudden change of the Hubbard inter
 action\, starting from a metallic or a Mott-insulating initial state. We o
 bserve relaxation to a new steady state\, showing that the presence of the
  Mott gap does not inhibit relaxation. The steady-state properties are des
 cribed by generalized Gibbs ensembles which take all constants of motion i
 nto account. We discuss under which conditions such ensembles provide the 
 correct statistical description of integrable systems [2].\n\n[1] M. Eckst
 ein and M. Kollar\, Phys. Rev. Lett. 100\, 120404 (2008).\n[2] M. Kollar a
 nd M. Eckstein\, Phys. Rev. A 78\, 013626 (2008).\n\n//indico.ictp.it/even
 t/a0921/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a0921/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Doping graphene with m
 etal contacts"
DTSTART;VALUE=DATE-TIME:20090217T100000Z
DTEND;VALUE=DATE-TIME:20090217T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0922@ictp.it
DESCRIPTION:Measuring the transport of electrons through a graphene sheet 
 necessarily involves contacting it with metal electrodes. We study the ads
 orption of graphene on metal substrates using first-principles calculation
 s at the level of density functional theory.  The bonding of graphene to A
 l\, Ag\, Cu\, Au and Pt(111) surfaces is so weak that its unique "ultrarel
 ativistic'' electronic structure is preserved. The interaction does\, howe
 ver\, lead to a charge transfer that shifts the Fermi level by up to 0.5 e
 V with respect to the conical points. The crossover from p-type to n-type 
 doping occurs for a metal with a work function ~5.4 eV\, a value much larg
 er than the work function of free-standing graphene\, 4.5 eV.  We develop 
 a simple analytical model that describes the Fermi level shift in graphene
  in terms of the metal substrate work function. Graphene interacts with an
 d binds more strongly to Co\, Ni\, Pd and Ti. This chemisorption involves 
 hybridization between graphene p_z-states and metal d-states that opens a 
 band gap in graphene. The graphene work function is as a result reduced co
 nsiderably. In a current-in-plane device geometry this should lead to n-ty
 pe doping of graphene.\n\n//indico.ictp.it/event/a0922/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0922/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Spin-torque
  shot noise in magnetic tunnel junctions"\n\n
DTSTART;VALUE=DATE-TIME:20090219T100000Z
DTEND;VALUE=DATE-TIME:20090219T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0928@ictp.it
DESCRIPTION:A spin polarized current may transfer angular momentum to a fe
 rromagnet\, resulting in a spin-torque phenomenon. At the same time the sh
 ot noise\, associated with the current\, leads to a nonequilibrium stochas
 tic force acting on the ferromagnet. We derive a stochastic version of the
  Landau-Lifshitz-Gilbert equation for a magnetization of a "free" ferromag
 netic layer in contact with a "fixed" ferromagnet. We solve the correspond
 ing Fokker-Planck equation and show that the nonequilibrium noise yields t
 o a nonmonotonic dependence of the precession spectrum linewidth on the cu
 rrent.\n\n//indico.ictp.it/event/a0928/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0928/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Lanford Theorem and
  the validity of Boltzmann equation"\n
DTSTART;VALUE=DATE-TIME:20090224T113000Z
DTEND;VALUE=DATE-TIME:20090224T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0929@ictp.it
DESCRIPTION:We will review the mathematical foundation of Boltzmann equati
 on and the theorem of Lanford. \nWe will take particular care on the mathe
 matical aspects of the theory.\n\n//indico.ictp.it/event/a0929/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a0929/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR on Disorder and strong electron correlations: "Multipartic
 le interference in electronic Mach-Zehnder interferometers"\n
DTSTART;VALUE=DATE-TIME:20090226T100000Z
DTEND;VALUE=DATE-TIME:20090226T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0933@ictp.it
DESCRIPTION:Electronic Mach-Zehnder interferometers were constructed recen
 tly from chiral one-dimensional integer quantum Hall edge states. These in
 terferometers showed an unexpected behavior of the visibility of Aharonov-
 Bohm (AB) oscillations in the nonlinear regime\, where the visibility deve
 loped a lobe structure accompanied by the $pi$-jumps of the AB-phase [1]. 
 We address these phenomena by studying the model of a Mach-Zehnder interfe
 rometer\, where the one-dimensional electrons interact via long-range pote
 ntial. We calculate exactly the visibility of the Aharonov-Bohm oscillatio
 ns in this model\, which agrees well with experimental results.\n\n[1] "Un
 expected Behavior in a Two-Path Electron Interferometer"\, I. Neder\, M. H
 eiblum\, Y. Levinson\, D. Mahalu\, and V. Umansky\, Phys. Rev. Lett. 96\, 
 016804\, (2006)\n\n//indico.ictp.it/event/a0933/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0933/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Spreading processes in c
 omplex techno-social networks"\n
DTSTART;VALUE=DATE-TIME:20090302T133000Z
DTEND;VALUE=DATE-TIME:20090302T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0937@ictp.it
DESCRIPTION:In different contexts we are challenged by multi-scale network
 s where infrastructures composed by different technological layers are int
 eroperating with the social component that drives their use and developmen
 t. Examples are provided by the Internet\, the social Web\, the new WiFi c
 ommunication technologies and transportation and mobility infrastructures.
  The multi-scale nature and complexity of these techno-social networks are
  crucial features in the understanding of these systems and the dynamical 
 processes occurring on top of them. We will discuss the central statistica
 l features of these networks and their impact on epidemic\, contagion and 
 spreading processes in both the biological world and the ITC domain. We wi
 ll present the development of realistic computational models based on the 
 network paradigm and the reaction–diffusion processes framework that all
 ows their theoretical understanding. Finally we will analyze the central r
 ole of complex networks thinking in the definition of predictive large sca
 le computational approaches for the modeling of emergent disease spreading
 .\n\n//indico.ictp.it/event/a0937/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a0937/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR:"Coarsening in 2d:exa
 ct results\, simulations and experiments"\n\n\n\n
DTSTART;VALUE=DATE-TIME:20090303T113000Z
DTEND;VALUE=DATE-TIME:20090303T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0938@ictp.it
DESCRIPTION:Dynamical systems quenched from a disorder into an ordered pha
 se\, may display coarsening phenomena. The simplest example is the Ising f
 erromagnet. When the system is cooled rapidly through the transition tempe
 rature\, domains of the two ordered phases form and grow (coarsen) with ti
 me. In the present work we obtain the exact result for the statistics of t
 he areas enclosed by domain boundaries for the coarsening dynamics of a no
 nconserved scalar field in two dimensions. This result represents the firs
 t analytical demostration of the dynamical scaling hypothesis for this sys
 tem. These results can be also generalizated to the coarsening dynamics un
 der the effect of finite temperature or the presence of quenched disorder.
  All these results have been tested with simulations on the two-dimensiona
 l square-lattice Ising model using a Montecarlo algorithm. We have also do
 ne experiments on the coarsening dynamics of liquid crystals. It was propo
 sed that deracemization in this system is a curvature-driven process. We t
 est this prediction using our exact result for the distrubution of areas. 
 We demonstrate that deracemization in such liquid crystals belongs to the 
 Allen-Cahn universality class\, and that the exact formula\, can be used a
 s a strict test for this dynamic universality class.\n\n//indico.ictp.it/e
 vent/a0938/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0938/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar:"Phase diagram of a  
 Y-shaped Josephson junction network"\n
DTSTART;VALUE=DATE-TIME:20090310T113000Z
DTEND;VALUE=DATE-TIME:20090310T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0940@ictp.it
DESCRIPTION:It is shown that\, for pertinent values of the fabrication and
  control parameters\, an attractive finite coupling fixed point emerges in
  the phase diagram of a Y-junction of superconducting Josephson chains.  T
 he new fixed point arises only when the dimensionless flux f  piercing the
  central loop of the network equals \\pi.  A detailed account of the Josep
 hson current-phase relationship along the arms of the network\, near each 
 one of the allowed fixed points\, is provided.  The results evidence remar
 kable similarities between the phase diagram accessible to a Y-junction of
  superconducting Josephson chains and the one found in the analysis.\n\n//
 indico.ictp.it/event/a0940/
LOCATION:SISSA Main Bld. - Lecture Room 'D'
URL://indico.ictp.it/event/a0940/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar: "Signatures of the superfluid to \nMott insulato
 r transition in  cold bosonic atoms in 1D optical lattice"\n
DTSTART;VALUE=DATE-TIME:20090311T150000Z
DTEND;VALUE=DATE-TIME:20090311T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0942@ictp.it
DESCRIPTION:We study the Bose-Hubbard model using the finite size density 
 matrix renormalization group method. We obtain a complete phase diagram fo
 r a system in the presence of a harmonic trap and compare it with that of 
 the homogeneous system.\nThe superfluid to the Mott insulator phase transi
 tion is investigated using different experimental signatures of these phas
 es in quantities such as momentum distribution\, visibility\, condensate f
 raction and the total number of bosons at a particular density. The relati
 onships between the various experimental signatures and the phase diagram 
 are highlighted.\n\n//indico.ictp.it/event/a0942/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0942/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Stretched q
 uantum states emerging from Majorana zero modes"\n
DTSTART;VALUE=DATE-TIME:20090312T100000Z
DTEND;VALUE=DATE-TIME:20090312T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0941@ictp.it
DESCRIPTION:Effects associated with the existence of isolated zero modes o
 f Majorana fermions are discussed. It is argued that the quantization of t
 his system necessarily contains highly extended (stretched) quantum\nstate
 s and that\, populating or depopulating such states by interacting with th
 e quantum system\, leads to long- ranged teleportation-like processes.  A 
 model consisting of a quantum wire embedded in a p-wave superconductor is 
 discussed as an explicit - and exactly solvable- example of a physical sys
 tem with isolated Majorana zero modes.\n\n//indico.ictp.it/event/a0941/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0941/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Typical properties 
 of asset pricing theory in complex markets"
DTSTART;VALUE=DATE-TIME:20090317T113000Z
DTEND;VALUE=DATE-TIME:20090317T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0946@ictp.it
DESCRIPTION:The expansion in the diversity of instruments in financial mar
 kets\, according to Asset Pricing Theory (APT)\, provides more means for r
 isk diversification\, and brings the syetem closer to the limit of "comple
 te markets"\, in which risk can be eliminated altogether.\nThe proliferati
 on of credit derivatives in the past decade\, and the recent crisis\, have
  raised serious doubts on this view\, mostly because of market imperfectio
 ns\, i.e. deviations of real markets from the ideal conditions postulated 
 in APT.\nIn this talk\, I will first review the main insights of APT. Then
  I will show that one can use the tools of statistical physics of disorder
 ed systems to characterize the typical properties of a large random market
 . This suggests that\, even in the idealized market described by APT\, the
  proliferation of financial instruments erodes systemic stability and it d
 rives the market to a critical state characterized by large susceptibility
 .\n\n//indico.ictp.it/event/a0946/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0946/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: \n"Horizon i
 n random matrix theory\,  Hawking radiation and flow of cold atoms"\n\n
DTSTART;VALUE=DATE-TIME:20090319T100000Z
DTEND;VALUE=DATE-TIME:20090319T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0947@ictp.it
DESCRIPTION:We show that the large distance behavior of the density-densit
 y correlation function of a weakly confined Random Matrix ensemble can be 
 exactly reproduced by a Gaussian scalar field theory in a curved two-dimen
 sional space-time characterized by the presence of a singularity and of an
  event horizon. Therefore\, we propose this as a low-energy effective theo
 ry describing the ensemble\, in analogy to what has been done for other in
 variant ensembles and Luttinger Liquid theory. The presence of an event ho
 rizon in the curved space-time naturally gives rise to a the phenomenon kn
 own as Hawking radiation. A similar mapping with another gravitational ana
 logue model has been shown to exist with a Bose-Einstein condensate pushed
  to flow at a velocity higher than its speed of sound. In this case the Ha
 wking radiation is composed of sound waves propagating over the cold atoms
 . Our work suggests a three-fold connection between a moving BEC system\, 
 black-hole physics and unconventional RMEs.\n\n//indico.ictp.it/event/a094
 7/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0947/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Backward Fokker-Pla
 nck Methods for First-Passage Problems"\n
DTSTART;VALUE=DATE-TIME:20090324T113000Z
DTEND;VALUE=DATE-TIME:20090324T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0949@ictp.it
DESCRIPTION:The Backward Fokker-Planck Equation (BFPE) provides an elegant
  technique for solving a number of first-passage problems. After an introd
 uction to the method\, the usefulness of the BFPE will be illustrated by a
 pplying it\nto a number of problems  of increasing complexity\, namely\n(i
 ) the simple random walk with an absorbing boundary at the origin\;\n(ii) 
 the simple random walk with an absorbing boundary moving with constant vel
 ocity\;\n(iii) the simple random walk with two absorbing boundaries moving
  at different velocities\, and\n(iv) the random walk in the presence of va
 rious types of "shear flow" and an absorbing boundary at the origin.\nThe 
 last of these is a problem with very rich behavior\, depending on the natu
 re of the "shear flow".\n\n//indico.ictp.it/event/a0949/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a0949/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar:  "Light-matter interactions for quantum informat
 ion: Long-lived quantum memories"\n
DTSTART;VALUE=DATE-TIME:20090325T150000Z
DTEND;VALUE=DATE-TIME:20090325T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0953@ictp.it
DESCRIPTION:The ability to distribute and store quantum information would 
 provide the potential for revolutionary technological advances from comple
 tely secure communication to quantum computing.  Decoherence and propagati
 on losses\, however\, severely limit our ability to implement these scheme
 s. Quantum memories cannot be continuously read and refreshed as classical
  memories can since any measurement will alter the underlying state.  The 
 only option remaining is to isolate a memory from any external influences.
 \nWe report recent implementations long-lived memories using collective ex
 citations in atomic ensembles. Scattering of a light field from an ensembl
 e results in the emission of a signal photon and an imprinted atomic spin 
 wave. By understanding the primary sources of the coherence\, magnetic fie
 ld and atomic motion\, we show how one can combat their deleterious effect
 s.  We present an analysis of the dynamics of retrieval of information fro
 m our memories and show how it was exploited to produce memory times in ex
 cess of 6 milliseconds.  We also demonstrate how one can use controlled in
 teractions with magnetic fields to execute qubit rotations during storage.
  The variation of retrieval dynamics with storage time can also be used as
  a measure of initial populations of the atomic states.\n\n//indico.ictp.i
 t/event/a0953/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0953/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Superfluid 
 turbulence at T=0"
DTSTART;VALUE=DATE-TIME:20090326T100000Z
DTEND;VALUE=DATE-TIME:20090326T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0954@ictp.it
DESCRIPTION:Superfluid turbulence (ST)\, also known as quantum turbulence\
 , is a tangle of quantized vortex lines in a superfluid.  ST can be create
 d in a number of ways:\n(i) as a result of non-equilibrium kinetics of Bos
 e-Einstein condensation\, in which case it is a manifestation of generic K
 ibble-Zurek mechanism\,\n(ii) in the counter-flow of normal and superfluid
  components\, \n(iii) as a result of macroscopic motion of a superfluid\, 
 in which case it can mimic (at large enough length scale) classical-fluid 
 turbulence.\n\nWe will make an introduction to the theory of relaxation ki
 netics of superfluid turbulence at T=0. The physics of zero-temperature li
 mit is very rich and attractive in view of essentially conservative charac
 ter of vortex dynamics. The theory will allow us to interpret recent intri
 guing experiments by A. Golov and collaborators.\n\n//indico.ictp.it/event
 /a0954/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0954/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Extreme Eigenvalues
  of Random Matrices"
DTSTART;VALUE=DATE-TIME:20090331T113000Z
DTEND;VALUE=DATE-TIME:20090331T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0957@ictp.it
DESCRIPTION:The statistical properties of the extreme (maximum/minimum) ei
 genvalue of a random matrix are of interest in diverse fields ranging from
  disordered systems to statistical data analysis and even to string theory
 . In this talk I'll discuss some recent developments on the theory of extr
 emely rare fluctuations of the largest eigenvalue and its various applicat
 ions.\n\n//indico.ictp.it/event/a0957/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0957/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Symmetry ca
 uses a huge conductance peak  in double quantum dots"\n\n
DTSTART;VALUE=DATE-TIME:20090402T100000Z
DTEND;VALUE=DATE-TIME:20090402T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0963@ictp.it
DESCRIPTION:We predict a huge interference effect contributing to the cond
 uctance through large ultra-clean quantum dots of chaotic shape. When a do
 uble-dot structure is made such that the dots are the mirror-image of each
  other\, constructive interference can make a tunnel barrier located on th
 e symmetry axis effectively transparent. We show (via theoretical analysis
  and numerical simulation) that this effect can be orders of magnitude lar
 ger than the well-known universal conductance fluctuations and weak-locali
 zation (both less than a conductance quantum). A small magnetic field dest
 roys the effect\, massively reducing the double-dot conductance\; thus a m
 agnetic field detector is obtained\, with a similar sensitivity to a SQUID
 \, but requiring no superconductors.\n\n[Robert S. Whitney\, P. Marconcini
 \, M. Macucci\, to appear in Phys. Rev. Lett. (2009) arXiv:0902.3099]\n\n/
 /indico.ictp.it/event/a0963/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0963/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Fibonacci Anyons an
 d Topological Quantum Computation"
DTSTART;VALUE=DATE-TIME:20090407T113000Z
DTEND;VALUE=DATE-TIME:20090407T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0965@ictp.it
DESCRIPTION:Topological quantum computation is considered the best proposa
 l to overcome local errors in the realization of a quantum computer. In th
 is scheme\, it is well known that Fibonacci anyons can be used to implemen
 t the universal quantum computation\, allowing to approximate with their b
 raidings every single-qubit and two-qubit gate at any given accuracy. In t
 his talk we will analyze the key features of these non-abelian anyons and 
 of their braiding group\; we will study the main technics used to achieve 
 the compiling of single-qubit gates\, focusing our attention on Bonesteel'
 s "brute force" approach and on the quantum hashing through the icosahedra
 l group.\n\n//indico.ictp.it/event/a0965/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a0965/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA CONDENSED MATTER SEMINARS: "Re-Visiting Orbital D
 iamagnetism: A Surprise"
DTSTART;VALUE=DATE-TIME:20090415T150000Z
DTEND;VALUE=DATE-TIME:20090415T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0968@ictp.it
DESCRIPTION:It is  generally known that the orbital diamagnetism of a clas
 sical system of charged particles in thermal equilibrium is identically ze
 ro - the Bohr-van Leeuwen theorem. Physically\, this null result derives f
 rom the exact cancellation of the orbital diamagnetic moment associated wi
 th the complete cyclotron orbits of the charged particles by the paramagne
 tic moment subtended by the incomplete orbits skipping the boundary in the
  opposite sense. Motivated by this crucial\, but subtle role of the bounda
 ry\, wed have simulated here the case of a finite but unbounded system\, n
 amely that of a charged particle moving on the surface of a sphere in the 
 presence of an externally applied uniform magnetic field. Following a real
  space-time approach based on the classical Langevin equation\, we have co
 mputed the orbital magnetic moment which now indeed turns out to be non-ze
 ro\, and has the diamagnetic sign. To the best of our knowledge\, this is 
 the first report of the possibility of finite classical diamagnetism in pr
 inciple\, and it is due to the avoided cancellation\n\n//indico.ictp.it/ev
 ent/a0968/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0968/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR on Disorder and strong electron correlations:" Local densi
 ty of states of 1D Mott insulators and CDW states with a boundary "\n\n
DTSTART;VALUE=DATE-TIME:20090416T100000Z
DTEND;VALUE=DATE-TIME:20090416T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0969@ictp.it
DESCRIPTION:We determine the local density of states (LDOS) of one-dimensi
 onal incommensurate charge density wave (CDW) states in the presence of a 
 strong impurity potential\, which is modeled by a boundary. We find that t
 he CDW gets pinned at the impurity\, which results in a singularity in the
  Fourier transform of the LDOS at momentum 2k_F. At energies above the spi
 n gap we observe dispersing features associated with the spin and charge d
 egrees of freedom respectively. In the presence of an impurity magnetic fi
 eld we observe the formation of a bound state localized at the impurity. A
 ll of  our results carry over to the case of 1D Mott insulators by exchang
 ing the  roles of spin and charge degrees of freedom. We discuss the impli
 cations of our result for scanning tunneling microscopy experiments on spi
 n-gap systems such as two-leg ladder cuprates.\n\n//indico.ictp.it/event/a
 0969/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0969/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar: "Spin quantum Hall effect in  class C supercondu
 ctors and quantum spin Hall effect in graphene"\n
DTSTART;VALUE=DATE-TIME:20090420T100000Z
DTEND;VALUE=DATE-TIME:20090420T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0970@ictp.it
DESCRIPTION:We study a delocalization transition in a system of noninterac
 ting quasiparticles moving in two dimensions\, which belongs to a new symm
 etry class C.  This symmetry class can be realized in a dirty\, gapless su
 perconductor in which time-reversal symmetry for orbital motion is broken\
 , but spin-rotation symmetry is intact. In this class spin current is tran
 sferred by electron-hole pairs.  Further\, we consider a three-dimensional
  realization of class C. In the last part of the talk\, we discuss applica
 tion of the generalized Chalker-Coddington network model to the quantum sp
 in Hall effect in graphene\, which differs significantly from class C.  In
  particular\, spin current is transferred by electrons with opposite spins
  moving in the opposite directions.\n\n//indico.ictp.it/event/a0970/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0970/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Generating Function
 al Analysis of an Interacting Geometric Brownian Motion for Stock Market D
 ynamics "\n
DTSTART;VALUE=DATE-TIME:20090421T113000Z
DTEND;VALUE=DATE-TIME:20090421T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0973@ictp.it
DESCRIPTION:In this talk I will discuss a minimal interacting generalisati
 on of the geometric Brownian motion model be formally equivalent to a mode
 l describing the dynamics of networks of analogue neurons. Using the Gener
 ating Functional formalism\, I will show how one can solve for the steady 
 state solutions in a non-trivial and interesting regime\n\n//indico.ictp.i
 t/event/a0973/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0973/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Trions and 
 quartet condensates in one-dimensional multicomponent \nultracold fermions
 "\n
DTSTART;VALUE=DATE-TIME:20090423T100000Z
DTEND;VALUE=DATE-TIME:20090423T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0975@ictp.it
DESCRIPTION:In this talk\, we will discuss the possible stabilization of a
  molecular superfluid phase in multicomponent attractive Fermi gas where m
 ore than two fermions form a bound state. We will show\, by means of a low
 -energy approach and large scale DMRG calculations\, that trionic (three-b
 ody bound states) and quartet phases emerge in multicomponent ultracold fe
 rmions loaded into one-dimensional  optical lattice at sufficiently small 
 density.\n\n//indico.ictp.it/event/a0975/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0975/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Statistical Mechani
 cs of sub-graph identification problems"\n
DTSTART;VALUE=DATE-TIME:20090428T113000Z
DTEND;VALUE=DATE-TIME:20090428T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0981@ictp.it
DESCRIPTION:Network analysis\, inference and optimization represent method
 ological challenges which play a central role in large scale data analysis
 . Their practical  relevance arises from the huge  quantity of empirical d
 ata that is being made available in many fields of science\, biology and e
 conomics in first place.  In this talk we shall discuss some new statistic
 al physics approaches to basic network optimization problems that come fro
 m sub-graph identification.\nFirstly we show how to approach the so called
  sub-graph isomorphism problem\, one of the most fundamental NP-hard probl
 ems in graph theory. We display three applications: maximum clique identif
 ication\, graph alignment and network motif counting. Secondly we discuss 
 how to generalize the cavity method to deal with the problem of searching 
 for  sub-network which are subject to topological constraints. The specifi
 c case of bounded depth Spanning trees is discussed in some detail\, toget
 her with a novel application to high dimensional  data clustering.\n\n//in
 dico.ictp.it/event/a0981/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a0981/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed matter seminar: "Stochastic approach to
  chaotic stick-slip in granular systems"
DTSTART;VALUE=DATE-TIME:20090429T150000Z
DTEND;VALUE=DATE-TIME:20090429T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0976@ictp.it
DESCRIPTION:The sliding of contacting surfaces is a formidable problem wit
 h impact in many areas\, ranging from atomic to tectonic in scale. In seve
 ral cases it can result in steady sliding or periodic stick-slip motion\, 
 but often displays an intermittent and erratic nature\, for which effectiv
 e descriptions are lacking. In order to investigate  this kind of dynamics
  we have set up an experiment in which a  rigid plate engages in stick-sli
 p shear motion on a granular bed.  In order to describe the resulting  mot
 ion we have adopted an unusual approach which is not deterministic in natu
 re (as opposed to\, e.g. Burridge-Knopoff and Frenkel-Kontorova models)\, 
 finding that the dynamics can be accurately described in a quantitative wa
 y by  a simple stochastic equation\, in which the resulting force exerted 
  by the medium on the plate performs a random walk.  Further work  on the 
 statistical properties of friction in solid-on-solid systems and compariso
 ns with other phenomena suggest that a large class of driven instabilities
  can be described in terms of similar general mechanisms. Preliminary resu
 lts on variable height and shaken granular bed are presented.\n\n//indico.
 ictp.it/event/a0976/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0976/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on  Disorder and strong electron correlations: "Noise corr
 elations in cold atoms"\n
DTSTART;VALUE=DATE-TIME:20090430T100000Z
DTEND;VALUE=DATE-TIME:20090430T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0982@ictp.it
DESCRIPTION:I explain a connection of so-called full distribution function
  (an analogue of the full counting statistics)\, which we introduced and c
 omputed (exactly in various cases!) with variety of exactly solvable model
 s\, conformal field theory\, AdS/CFT and Langlands dualities.\n\n//indico.
 ictp.it/event/a0982/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0982/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "Random matrix theory and \nits applications to t
 he strong interactions"\n
DTSTART;VALUE=DATE-TIME:20090506T153000Z
DTEND;VALUE=DATE-TIME:20090506T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0988@ictp.it
DESCRIPTION:In this talk I review how the concept of Random Matrix Theory 
 (RMT) is used as an effective field theory of the theory of strong interac
 tions in Quantum Chromodynamics (QCD).  I begin by stating the approximati
 ons made that map QCD to a sigma model - the theory of Goldstone modes - a
 nd ultimately to a RMT formulation. Various correlation functions in the r
 elevant symmetry class can be computed either from the sigma model or RMT\
 , and then compared to numerical solutions of QCD in that limiting regime.
   Recent developments include non-Hermitian RMT and complex eigenvalue spe
 ctra of the QCD Dirac operator.\n\n//indico.ictp.it/event/a0988/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0988/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on  Disorder and strong electron correlations: "Commensura
 te-incommensurate phase transition in electron systems"\n\n
DTSTART;VALUE=DATE-TIME:20090507T100000Z
DTEND;VALUE=DATE-TIME:20090507T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0986@ictp.it
DESCRIPTION:The talk will be on the influence of single electron bare spec
 trum nonlinearity at the Fermi surface (curvature of the Fermi surface) on
  the commensurate-incommensurate phase transition in 1D electron systems.\
 n\n//indico.ictp.it/event/a0986/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0986/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "What happens when Boso
 ns are interacting\, confined and are at a finite temperature?"
DTSTART;VALUE=DATE-TIME:20090508T153000Z
DTEND;VALUE=DATE-TIME:20090508T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0987@ictp.it
DESCRIPTION:The successful observation of Bose-Einstein condensation (BEC)
  in weakly interacting dilute alkali gases\, confined by inertial magneto-
 optic traps\, has provoked a flood of activities both theoretically and ex
 perimentally. By majority the ground state properties of interacting and c
 onfined Bosons are studied with the stationary solutions of Gross-Pitaevsk
 ii (GP) mean-field equation. In this talk as a contrast\, I shall present 
 a general microscopic theory of confined interacting Bosons at non-zero te
 mperature. The method employed for this investigation is the double-time t
 emperature Green function technique. I shall discuss some new results beyo
 nd the usual mean-field theory and highlight the crucial role of temperatu
 re\, confinement and interaction to the properties\; namely energetics and
  depletion of the condensates. I shall also discuss the collective modes o
 f the confined Bosons.\n\n//indico.ictp.it/event/a0987/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0987/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed matter seminar: "Band structure and mec
 hanical properties of Titanium alloys"
DTSTART;VALUE=DATE-TIME:20090511T150000Z
DTEND;VALUE=DATE-TIME:20090511T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0991@ictp.it
DESCRIPTION://indico.ictp.it/event/a0991/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a0991/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Collective modes of
  trapped Fermi gases with in-medium interaction"
DTSTART;VALUE=DATE-TIME:20090512T113000Z
DTEND;VALUE=DATE-TIME:20090512T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0990@ictp.it
DESCRIPTION:Due to the Pauli blocking of the intermediate states\, the sca
 ttering matrix (or T matrix) of two fermionic atoms in a Fermi gas becomes
  different from that of two atoms in free space. We calculate  the in-medi
 um T matrix in ladder approximation and study its effects on the propertie
 s of the collective modes of a trapped gas in the normal-fluid phase. We i
 ntroduce the in-medium interaction on both sides of the Boltzmann equation
 \, namely in the calculation of the mean field and in the calculation of t
 he collision rate. This allows us to explain the observed upward shift of 
 the frequency of the quadrupole mode in the collisionless regime. By inclu
 ding the mean field\, we also improve considerably the agreement with the 
 measured temperature dependence of frequency and damping rate of the sciss
 ors mode\, whereas the use of the in-medium cross section deteriorates the
  description\, in agreement with previous work.\n\n//indico.ictp.it/event/
 a0990/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0990/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Relativisti
 c transport in clean graphene -  a nearly perfect quantum liquid"\n
DTSTART;VALUE=DATE-TIME:20090514T100000Z
DTEND;VALUE=DATE-TIME:20090514T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0992@ictp.it
DESCRIPTION:The electrons and holes in a graphene sheet behave very much l
 ike a relativistic liquid. As a consequence\, the properties of thermo-ele
 ctric transport of this fluid of interacting Dirac fermions are rather pec
 uliar.  At small doping and high temperatures\, graphene exhibits many sig
 natures of a quantum critical system: the inelastic scattering rate is set
  only by the temperature\, and the conductivity assumes a nearly universal
  value\, solely due to electron-hole friction.  In this regime we find pro
 nounced deviations from standard Fermi liquid behavior and a peculiar coll
 ective cyclotron resonance in the frequency dependent response.  Some of t
 hese results have been anticipated by a relativistic hydrodynamic theory\,
  and are fully confirmed by Boltzmann transport theory for weak coupling. 
  Most interestingly\, similar results are also found in the case of certai
 n strong coupled liquids which can be solved exactly by the AdS-CFT corres
 pondence.  Moreover\, in that context it is interesting that undoped graph
 ene turns out to be a nearly ideal fluid with an anomalously small electro
 nic viscosity\, very similar to recent observations in the ultra-relativis
 tic quark gluon plasma. I will also discuss possible consequences of the l
 ow viscosity for electronic transport in clean graphene.\n\n//indico.ictp.
 it/event/a0992/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0992/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Effective thermal d
 ynamics following a quantum quench in a spin chain"\n\n
DTSTART;VALUE=DATE-TIME:20090519T113000Z
DTEND;VALUE=DATE-TIME:20090519T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0993@ictp.it
DESCRIPTION:Recent experiments with ultracold atomic gases have triggered 
 a great deal of interest in some fundamental aspects of the non-equilibriu
 m dynamics of strongly correlated quantum systems. In particular\, they ra
 ised an intense discussion on the general relation between system integrab
 ility and thermalization in the long-time dynamics of such systems. \n\nIn
 stead of focusing on the asymptotic values of significant observables\, we
  take a rather different perspective and study the dependence of the intri
 nsic dynamical time-scale on the initial state. We do this by considering 
 the quantum Ising chain: we drive it out-of-equilibrium by abruptly quench
 ing the transverse field. We focus on the onsite autocorrelation function 
 of the order parameter\, extracting the phase coherence time from its asym
 ptotic decay. This phase coherence time is shown to be determined only by 
 the final Hamiltonian gap\, and an effective temperature which depends on 
 the energy of the initial state after the quench. Moreover\, the dependenc
 e of the coherence time on the effective temperature fairly agrees with th
 at obtained in thermal equilibrium as a function of the equilibrium temper
 ature. These results pertain to the Ising universality class\, while the i
 ntegrability of the model seems not to be crucial.\n\n//indico.ictp.it/eve
 nt/a0993/
LOCATION:SISSA Main Building - Room D
URL://indico.ictp.it/event/a0993/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Large devia
 tions in non-equilibrium 1d systems"\n\n
DTSTART;VALUE=DATE-TIME:20090522T113000Z
DTEND;VALUE=DATE-TIME:20090522T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0994@ictp.it
DESCRIPTION:Interacting classical particles diffusing in 1d have provided 
 in recent years an interesting playground to study non-equilibrium phenome
 na.  The dynamics of some of these models is described by an evolution ope
 rator\,  which can be written as a spin chain Hamiltonian H.  One is inter
 ested in the steady state and in the probability that the system presents 
 an atypical current flow.  These are described by large deviation function
 s (ldf).\nFinding the ldf amounts to determining the ground state of H - a
  task similar to the quantum problems.  I will present different methods (
 Bethe Ansatz\, fluctuating hydrodynamics) used to compute the ldf and to c
 haracterize its singularities - which correspond to dynamical phase transi
 tions.  Some class of systems also present an intriguing duality between n
 on-equilibrium and equilibrium\, that reveal for instance the origin of lo
 ng-range correlations induced e.g. by contact with reservoirs of different
  chemical potential.\n\n//indico.ictp.it/event/a0994/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a0994/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CONDENSED MATTER AND STATISTICAL PHYSICS SECTION - SPECIAL SEMINAR
 : "Learning from Bacteria about Information Processing"
DTSTART;VALUE=DATE-TIME:20090525T153000Z
DTEND;VALUE=DATE-TIME:20090525T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09100@ictp.it
DESCRIPTION:Bacteria\, the first and most fundamental of all organisms\, l
 ead rich social life in complex hierarchical communities. Collectively\, t
 hey gather information from the environment\, learn from past experience\,
  and take decisions. Bacteria do not store genetically all the information
  required for efficient responding to all possible environmental condition
 s. To solve the new encountered problems (challenges) posed by the environ
 ment\, they first asses the problem via collective sensing\, recall stored
  information of past experience and then execute distributed information p
 rocessing by the 109-12 bacteria using sophisticated communication strateg
 ies to link the intracellular computation networks of each bacterium (incl
 uding signaling path ways of billions of molecules) into a network of netw
 orks. I will show illuminating movies of swarming intelligence of live bac
 teria in which they solve optimization problems that are beyond what we\, 
 human being\, can solve with our most powerful computers. This will lead m
 e to a discussion about the special nature of bacteria computational princ
 iples.\n\n//indico.ictp.it/event/a09100/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09100/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Defect flows in con
 formal minimal models"
DTSTART;VALUE=DATE-TIME:20090526T113000Z
DTEND;VALUE=DATE-TIME:20090526T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09103@ictp.it
DESCRIPTION:By a defect we mean a line of inhomogeneity where the expectat
 ion values of fields are allowed to be discontinuous or even singular. Def
 ects can also form an interface between two different theories. In the cas
 e of conformal field theories those defects are especially interesting whi
 ch are invariant under scale transformations. These conformal defects are 
 the fixed points of the renormalisation group flows. In the talk I will re
 port a study of a simple example of a two-parameter space of renormalisati
 on group flows with the aim of identifying new conformal defects in unitar
 y minimal models.\n\n//indico.ictp.it/event/a09103/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09103/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Femtosecond time-resol
 ved spectroscopy of the solid state"\n
DTSTART;VALUE=DATE-TIME:20090527T150000Z
DTEND;VALUE=DATE-TIME:20090527T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a0995@ictp.it
DESCRIPTION:Solids are characterized by their different degrees of freedom
  charge\, lattice\, and spin. Coupling of these degrees of freedom to each
  other results in fundamental phenomena like superconductivity (electron-p
 honon coupling) or the Kondo effect (spin-dependent electron scattering). 
 Time-resolved spectroscopy employing femtosecond laser pulses faciliates d
 irect and independent access of these degrees of freedom and occasionally 
 novel insight into coupling mechanisms. In this talk two examples will be 
 presented. (a) Quasi-one dimensional structurs form charge density waves. 
 Using time- and angle-resolved photoelectron spectroscopy we have succeede
 d to monitor the single and many particle excitations in the charge densit
 y wave compound TbTe_3 close to thermodynamic equilibrium. In case of more
  intense optical excitation non-equilibrium conditions are generated\, whi
 ch finally lead to melting of the charge density wave and facilitate  an i
 dentification of the responsible mode. (b) Electron injection from a metal
  substrate into ice layers results in localization and subsequent stabiliz
 ation of these excess electrons\, which occurs by electron-induced rearran
 gement of water molecules. Due to the permanent electrical dipole moment t
 his process is refered to as electron solvation and we find a pronounced c
 orrelation of ice structure and solvation dynamics at such ice-metal inter
 faces. Electron traps at crystalline ice surfaces\, which exhibit extremel
 y long hot electron lifetimes up to minutes\, present a model system for s
 pecfic reaction sites as demonstrated for electron induced dissociation of
  Freon adsorbed on ice.\n\n//indico.ictp.it/event/a0995/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a0995/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on  Disorder and strong electron correlations\n"Nonlinear 
 dynamics of spin and charge in spin-Calogero model"\n
DTSTART;VALUE=DATE-TIME:20090528T100000Z
DTEND;VALUE=DATE-TIME:20090528T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09106@ictp.it
DESCRIPTION:The fully nonlinear dynamics of spin and charge in spin-Caloge
 ro model is studied.  The latter is an integrable one-dimensional model of
  quantum spin-1/2 particles interacting through inverse-square interaction
  and exchange.  Classical hydrodynamic equations of motion are written for
  this model in the regime where gradient corrections to the exact hydrodyn
 amic formulation of the theory may be neglected.  In this approximation va
 riables separate in terms of dressed Fermi momenta of the model.   Hydrody
 namic equations reduce to a set of decoupled Riemann-Hopf (or inviscid Bur
 gers') equations for the dressed Fermi momenta.  We study the dynamics of 
 some non-equilibrium spin-charge configurations for times smaller than the
  time-scale of the gradient catastrophe.  We find an interesting interplay
  between spin and charge degrees of freedom.  In the limit of large coupli
 ng constant the hydrodynamics reduces to the spin hydrodynamics of the Hal
 dane-Shastry model.\n\n//indico.ictp.it/event/a09106/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09106/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Adiabatic dynamics 
 in a spin-1 chain with uniaxial single-spin anisotropy"\n
DTSTART;VALUE=DATE-TIME:20090609T110000Z
DTEND;VALUE=DATE-TIME:20090609T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09112@ictp.it
DESCRIPTION:We numerically study the adiabatic quantum dynamics of an anis
 otropic spin-1 XY chain across a second order quantum phase transition. Th
 e system is driven out of equilibrium by performing a quench on the uniaxi
 al single-spin anisotropy\, that is supposed to vary linearly in time. We 
 focus on the behavior of the excess energy\, which quantifies the loss of 
 adiabaticity of the system during the evolution. For small system sizes on
 ly the ground state and the first excited state effectively participate in
  the evolution\, so the dynamics can be explained in terms of a Landau-Zen
 er model\, which describes an avoided level crossing between two levels. F
 or sufficiently large system sizes\, the excess energy after the quench ad
 mits a non trivial scaling behavior that is not predictable by standard Ki
 bble-Zurek arguments for isolated critical points or extended critical reg
 ions. This emerges from a competing effect of many accessible low-lying ex
 cited states\, inside the whole continuous line of critical points.\n\n//i
 ndico.ictp.it/event/a09112/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09112/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR SPECIAL SEMINAR:\nPha
 se transitions and random quantum satisfiability
DTSTART;VALUE=DATE-TIME:20090610T150000Z
DTEND;VALUE=DATE-TIME:20090610T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09116@ictp.it
DESCRIPTION:Alongside the effort underway to build quantum computers\, it 
 is important to better understand which classes of problems they will find
  easy and which others even they will find intractable. Inspired by the su
 ccess of the statistical study of classical constraint optimization proble
 ms\, we study random ensembles of the QMA$_1$-\ncomplete quantum satisfiab
 ility (QSAT) problem introduced by Bravyi.\nQSAT appropriately generalizes
  the NP-complete classical\nsatisfiability (SAT) problem. We show that\, a
 s the density of clauses/projectors is varied\, the ensembles exhibit quan
 tum phase transitions between phases that are satisfiable and unsatisfiabl
 e. Remarkably\, almost all instances of QSAT for any hypergraph exhibit th
 e same\ndimension of the satisfying manifold. This establishes the random 
 QSAT decision problem as equivalent to a\, potentially new\, graph theoret
 ic problem and that the hardest typical instances are likely to be localiz
 ed in a bounded range of clause density.\n\nWork done in collaboration wit
 h R. Moessner\, A. Scardicchio and S. Sondhi.\narXiv:0903.1904\n\n//indico
 .ictp.it/event/a09116/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09116/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Dynamical processes
  on scale-free networks: a mean field approach"\n
DTSTART;VALUE=DATE-TIME:20090616T113000Z
DTEND;VALUE=DATE-TIME:20090616T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09118@ictp.it
DESCRIPTION:We consider  dynamical processes on scale-free networks. We in
 troduce an approach allowing to derive Langevin equations for mean field o
 rder parameters that implicitly account for degree heterogeneity. In parti
 cular we focus on branching-annihilating random walks and we show that the
  critical properties of such systems explicitly depend on the parameter ch
 aracterizing the degree distribution. We also discuss the role of noise fo
 r finite systems\, showing how heterogeneous topologies can strongly affec
 t single realizations of the dynamical processes.\n\n//indico.ictp.it/even
 t/a09118/
LOCATION:SISSA-Lecture Room D
URL://indico.ictp.it/event/a09118/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Acoustic Black Hole
 s and the Correlations of Hawking Radiation"
DTSTART;VALUE=DATE-TIME:20090623T110000Z
DTEND;VALUE=DATE-TIME:20090623T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09119@ictp.it
DESCRIPTION:Hawking radiation in black holes is the most famous and elusiv
 e prediction of Quantum Field Theory in curved spacetime\, but so far no e
 xperiment is confirming its existence. More fundamental than the theory it
  has been first derived\, Hawking radiation has been extended to any syste
 m able to reproduce the geometrical features of a forming black hole spece
 time: for example in  supersonic flowing fluids the sound gets trapped exa
 ctly as light in a black hole. Such supersonic flow configurations are cal
 led "acoustic black holes" and can be  used as laboratory to test gravitat
 ional effects otherwise undetectable (as Hawking radiation). It has been r
 ecently proposed how a clear signature of the presence of Hawking radiatio
 n in acoustic black holes appears in the density correlation pattern\, ana
 lytically obtained using the formal analogy between gravitation and hydrod
 ynamics\, and numerically confirmed in an analysis able to take into accou
 nt the full microscopic structure of the system. In this seminar the main 
 features of the analogy between gravitation and hydrodynamics are reviewed
 . Then the peculiar correlation pattern associated to Hawking radiation is
  showed\, and its important role to reveal it in near future experiments i
 s underlined.\n\n//indico.ictp.it/event/a09119/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a09119/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Horizon in Random M
 atrix Theory\, Hawking Radiation and Flow of Cold Atoms"
DTSTART;VALUE=DATE-TIME:20090623T114500Z
DTEND;VALUE=DATE-TIME:20090623T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09120@ictp.it
DESCRIPTION:We show that the large distance behavior of the density-densit
 y correlation function of a weakly confined Random Matrix ensemble can be 
 exactly reproduced by a Gaussian scalar field theory in a curved two-dimen
 sional space-time characterized by the presence of a singularity and of an
  event horizon. Therefore\, we propose this as a low-energy effective theo
 ry describing the ensemble\, in analogy to what has been done for other in
 variant ensembles and Luttinger Liquid theory. The presence of an event ho
 rizon in the curved space-time naturally gives rise to a the phenomenon kn
 own as Hawking radiation. A similar mapping with another gravitational ana
 logue model has been shown to exist with a Bose-Einstein condensate pushed
  to flow at a velocity higher than its speed of sound. In this case the Ha
 wking radiation is composed of sound waves propagating over the cold atoms
 . Our work suggests a three-fold connection between a moving BEC system\, 
 black-hole physics and unconventional RMEs.\n\n//indico.ictp.it/event/a091
 20/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a09120/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar: "Raman scattering in graphene: \nA window on ele
 ctron dynamics"\n
DTSTART;VALUE=DATE-TIME:20090625T100000Z
DTEND;VALUE=DATE-TIME:20090625T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09122@ictp.it
DESCRIPTION:We will discuss Raman scattering in graphene.  It turns out th
 at the photoexcited electron-hole pairs\, which serve as intermediate stat
 es in the process\, are long-lived and their dynamics can be described qua
 siclassically. Moreover\, this dynamics can be probed in several experimen
 ts.\n\n//indico.ictp.it/event/a09122/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09122/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Seminar: "Spontaneous ordering in Brownian dynami
 cs: Some useful approaches"
DTSTART;VALUE=DATE-TIME:20090701T150000Z
DTEND;VALUE=DATE-TIME:20090701T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09126@ictp.it
DESCRIPTION:1. Phase transitions: combination of discrete and continues ap
 proaches\; \n2. Temporal-spatial maps and “Wilson-camera” approach\; \
 n3. “Object oriented” programming in cross-disciplinary modeling and "
 exotic" interactions\; \n4. Reducing number of “particles”\; \n5. Chao
 tic dynamics\, strange attractors\, solitary excitations and self-organize
 d motion\; \n6. Random and controllable deposition and numerical potential
 s to model friction\; \n7. Tribology\, directed transport and other studie
 s made in TAU and BTU.\n\n//indico.ictp.it/event/a09126/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09126/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Analysis of isoheig
 ht lines of rough surfaces using Schramm-Leowner evolution (SLE)"
DTSTART;VALUE=DATE-TIME:20090714T160000Z
DTEND;VALUE=DATE-TIME:20090714T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09189@ictp.it
DESCRIPTION:We investigate the statistics of isoheight lines of some rough
  surfaces  (simulated and grown) at different level sets around the mean h
 eight in the saturation regime.  We find that these contour lines are clos
 ely related to Schramm-Leowner evolutions\, therefore suggesting that conf
 ormal invariance is present.\nWe show that the isoheight lines on the WO3 
 surface are conformally invariant with the same statistics of domain walls
  in the critical Ising model.  They belong to the family of Schramm-Loewne
 r evolutions with diffusivity coefficient of 3 (or SLE3).  This can be reg
 arded as the firstexperimental observation of SLE curves.\nWe also investi
 gate the statistics of isoheight lines of 2+1 dimensional Kardar-Parisi-Zh
 ang (KPZ) model. We find that the exponent describing the distribution of 
 the height-cluster size behaves differently for level cuts above and below
  the mean height\, while the fractal dimensions of the height-clusters and
  their perimeters remain unchanged.  The statistics of the winding angle a
 lso confirms this observation in particular that the contour lines of the 
 KPZ model lie in the same universality class as self-avoiding random walks
 \, or SLE8/3.\n\n//indico.ictp.it/event/a09189/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a09189/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA CONDENSED MATTER SEMINARS: "Spin Hall Drag"
DTSTART;VALUE=DATE-TIME:20090909T150000Z
DTEND;VALUE=DATE-TIME:20090909T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09213@ictp.it
DESCRIPTION:Double-layer structures\, consisting of two parallel quantum w
 ells separated by a potential barrier\,  are an important class of nanosca
 le electronic devices. Each layer hosts a quasi-two-dimensional electron  
 gas and electrons interact across the barrier via Coulomb interaction. The
  combined action of the spin and  pseudo-spin (associated with the layer i
 ndex) degrees of freedom creates new phases in these bilayers  where the s
 pin and many-body interaction effects play a critical role.  \n	When an el
 ectric current is driven in one (active) layer of the bi-layer\, the inter
 -layer Coulomb  interaction causes charge accumulation in the other (passi
 ve) layer. This phenomenon\, known as Coulomb  drag\, is of fundamental in
 terest as a probe of electron correlations. Another effect of great intere
 st is the  Spin Hall Effect\, the generation of spin accumulation by an or
 dinary electric current. The spin Hall effect  is due to spin-orbit intera
 ction and SOI and has been a subject of vigorous research both in  semicon
 ductors and metals in recent years not only because of its theoretical sub
 tlety but also as a  potential source of spin polarized currents.\n	Lately
 \, we have predicted and analyzed theoretically a new effect in bi-layers\
 , which combines the  interesting features of spin Hall effect and Coulomb
  drag. We call it Spin Hall Drag. SHD consists in the  generation of spin 
 accumulation across the passive layer by an electric current flowing along
  the other  layer. Besides being a striking example of an effect that depe
 nds simultaneously on Coulomb interactions  and spin-orbit coupling\, the 
 SHD has several unexpected and non-trivial features. It occurs in the abse
 nce  of a current in the passive layer and\, as we have shown\, it is pred
 ominantly caused by a subtle effect  known as side-jump in electron-electr
 on collisions. This is at variance with the ordinary spin Hall effect\,  w
 hich\, for electrons in GaAs\, is dominated by an effect known as skew-sca
 ttering. We have shown that  the skew-scattering and the side-jump contrib
 utions (considered for the first time in a context of electron-  electron 
 scattering) are separated by different temperature dependences at low temp
 erature T\, with the  former vanishing much faster than the latter (T 3 vs
  T 2). Our calculations indicate that the induced spin  accumulation is la
 rge enough to be detected in optical rotation experiments.\n\n//indico.ict
 p.it/event/a09213/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09213/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar: "Modeling friction: Fro
 m the nano- to macro-scales"
DTSTART;VALUE=DATE-TIME:20090916T150000Z
DTEND;VALUE=DATE-TIME:20090916T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09215@ictp.it
DESCRIPTION:Frictional motion plays a central role in diverse systems and 
 phenomena that span vast ranges of scales\, from the nanometer contacts in
 herent in micro- and nanomachines and biological molecular motors to the g
 eophysical scales characteristic for earthquakes. Despite the practical an
 d fundamental importance of friction and the growing efforts in the field\
 , many key aspects of dynamics of friction are still not well understood. 
 One of the main difficulties in understanding and predicting frictional re
 sponse is the complexity of highly non-equilibrium processes going on in a
 ny tribological contact which include detachment and re-attachment of mult
 iple microscopic contacts (bonds) between the surfaces in relative motion 
 while still in contact. \nIn this lecture I will discuss microscopic model
 s which establish relationships between the dynamics of formation and rupt
 ure of individual contacts and frictional phenomena. First\, I will focus 
 on dynamics of nanoscale friction studied in friction force microscopy exp
 eriments. In this case we found that experimentally observed velocity and 
  temperature dependencies of friction can be rationalized by explicitly co
 nsidering the influence of temperature on the formation and rupturing of m
 icroscopic contacts. Then\,   dynamics of cracklike processes that occur a
 t the interface between two macroscopic blocks prior to the onset of frict
 ional motion will be discussed. In agreement with experimental observation
 s\, the proposed model demonstrates that the onset of sliding is preceded 
 by well-defined detachment fronts initiated at the slider trailing edge an
 d extended across the slider over limited lengths smaller than the overall
  length of the slider. We found that three different types of detachment f
 ronts may play a role in the onset of sliding: (i) Rayleigh (surface sound
 ) fronts\, (ii) slow detachment fronts\, and (iii) fast fronts. The import
 ant consequence of the precursor dynamics is that before the transition to
  overall sliding occurs\, the initially uniform\, unstressed slider is alr
 eady transformed into a highly nonuniform\, stressed state. Our model allo
 ws to explain experimental observations and predicts the effect of materia
 l properties on dynamics of transition to sliding.\n\n//indico.ictp.it/eve
 nt/a09215/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09215/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Master equation approa
 ch to friction on a mesoscale"\n
DTSTART;VALUE=DATE-TIME:20090923T150000Z
DTEND;VALUE=DATE-TIME:20090923T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09214@ictp.it
DESCRIPTION:Kinetics of the earthquakelike model with a distribution of st
 atic thresholds is reduced to a master equation which may be considered an
 alytically.  This approach naturally describes stick-slip and smooth slidi
 ng regimes of tribological systems within a framework which separates the 
 calculation of the friction force from the studies of the properties of th
 e contacts.\n\n//indico.ictp.it/event/a09214/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09214/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR - SPECIAL SEMINAR: "F
 undamental nonlinear equations in physics\, and their fundamental solution
 s"\n
DTSTART;VALUE=DATE-TIME:20090923T133000Z
DTEND;VALUE=DATE-TIME:20090923T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09222@ictp.it
DESCRIPTION:A brief overview of universal equations\, which govern the pro
 pagation of nonlinear waves in various physical media (both classical - su
 ch as optical fibers - and macroscopic quantum media\, such as Bose-Einste
 n condensates\, BECs)\, will be given. The survey will include the nonline
 ar Schroedinger (NLS)/Gross-Pitaevskii equations\, the sine-Gordon (SG) eq
 uation\, the Korteweg - de Vries (KdV) equation\, the Kadomtsev - Petviash
 vili (KP) equations\, and some others (the KP equations are two-dimensiona
 l models). All the above-mentioned equations\, in their ideal form\, share
  the fascinating property of the exact integrability\, by means of a mathe
 matical technique known as "the inverse-scattering transform". Not only ar
 e these equations ubiquitous and universal\, but also their fundamental so
 lutions - first of all\, solitons\, i.e.\, solitary waves - play a profoun
 dly important role in all physical settings to which the model equations a
 pply. Solitons have been predicted in a great variety of physical systems\
 , and one-dimensional solitons were observed and/or created experimentally
  in nonlinear optics\, BEC\, long Josephson junctions (superconductivity)\
 , fluid flows\, plasmas\, etc. A great challenge to the experiment is to p
 roduce stable two- and three-dimensional solitons.\n\n//indico.ictp.it/eve
 nt/a09222/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a09222/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on  Disorder and strong electron correlations: "Universal 
 physics in quantum nonequilibrium processes: Quantum quenches\, work stati
 stics and edge singularities"\n
DTSTART;VALUE=DATE-TIME:20091001T100000Z
DTEND;VALUE=DATE-TIME:20091001T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09225@ictp.it
DESCRIPTION:A quantum quench is a rapid change in time of a control parame
 ter in the Hamiltonian describing a quantum\, correlated many-body system.
   The physics of this paradigmatic non-equilibrium process\, which has bee
 n realized recently in the context of cold atoms\, is of particular intere
 st in quantum critical systems where concrete dynamical manifestations of 
 universality can be studied.  In this talk I will discuss two fundamental 
 ways to characterize these processes\, by either looking at the statistics
  of basic thermodynamic variables or at the asymptotics of correlators.  I
  will first elucidate the connection between a classic problem in condense
 d matter physics\, the  Fermi edge singularity\, the statistics of the wor
 k done in a quantum  quench\, and quantum Jarzynski equalities.  Using thi
 s connection\, I will discuss results for the statistics of the work in a 
 variety of systems\, such as the quantum Ising chain\, the Dicke model and
  quantum impurities.  I will show that quantum criticality manifests itsel
 f in the emergence of interesting edge singularities in the statistics of 
 the work and discuss their universality.  Similarly\, I will discuss how t
 he critical properties are encoded in the asymptotics of non-equilibrium c
 orrelators.\n\n//indico.ictp.it/event/a09225/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09225/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Phase-coher
 ent transport in  2D topological insulators"\n
DTSTART;VALUE=DATE-TIME:20091008T100000Z
DTEND;VALUE=DATE-TIME:20091008T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09228@ictp.it
DESCRIPTION:We investigate an effective low energy theory of HgTe quantum 
 wells near their mass inversion thickness in a perpendicular magnetic fiel
 d.  By comparison of the effective band structure with a more elaborated a
 nd well-established model\, the parameter regime and the validity of the e
 ffective model are quantified.  Optical transitions (between Landau levels
 ) in HgTe quantum wells are analyzed.  We find selection rules which we fu
 nctionalize to optically manipulate edge state transport. [1]  In the abse
 nce of magnetic fields\, the ballistic transport through HgTe quantum well
 s in the so-called inverted regime is believed to be dominated by edge sta
 te transport.  The existence of these edge states (at zero magnetic field)
  is one of the hallmarks of topological insulators. We show that transport
  through the gapped bulk via evanescent modes can in general not be neglec
 ted in ballistic HgTe quantum wells.\n\n[1] M.J. Schmidt\, E.G. Novik\, M.
  Kindermann\, and B. Trauzettel\, Phys. Rev. B 79\, 241306(R) (2009)\n\n//
 indico.ictp.it/event/a09228/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09228/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR:"Statistical mechanic
 s of congestion"\n
DTSTART;VALUE=DATE-TIME:20091013T100000Z
DTEND;VALUE=DATE-TIME:20091013T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09229@ictp.it
DESCRIPTION:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR\n\n\n\nWithin the
  framework of a simple model\, we are able to study the overall performanc
 e of a given informational network\, depending on its uptaking as well as 
 on the level of traffic control. Simple enough to get analytical results\,
  it  still shows a very rich phenomenology\, presenting continuous\, disco
 ntinuous as well as hybrid phase transitions between a free-flow phase and
  a congested phase\, critical points and different scaling behaviors in th
 e system size. We find that traffic control improves global performance\, 
 enlarging the free-flow region in parameter space only in heterogeneous ne
 tworks. Traffic control introduces non-linear effects and\, beyond a criti
 cal strength\, may trigger the appearance of a congested phase in a discon
 tinuous manner. The model also reproduces the cross-over in the scaling of
  traffic fluctuations empirically observed in the Internet.\nRef:\nPRE 79\
 , 015101(R) (2009)\nJstat P08023 (2009)\n\n//indico.ictp.it/event/a09229/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a09229/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar  on Disorder and strong electron correlations:\n"Novel sup
 erfluid states in bosonic systems"
DTSTART;VALUE=DATE-TIME:20091015T100000Z
DTEND;VALUE=DATE-TIME:20091015T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09230@ictp.it
DESCRIPTION:In this talk\, I will discuss unconventional superfluid states
  of various bosonic systems and present benchmark calculations for the gro
 und state and finite temperature phase diagrams.  The method of study is b
 ased on quantum Monte Carlo simulations by the Worm algorithm.  The two qu
 alitatively different systems to be discussed are: i) superfluidity of low
 er dimensional objects\, i.e. dislocations and defects\, embedded in solid
  structures both in optical lattices and in realistic systems such as 4-He
 . ii) the two-component Bose-Hubbard model.  Bosonic optical lattice syste
 ms are also interesting for studies of quantum magnetism where under certa
 in conditions they can be mapped onto various spin Hamiltonians.  On the o
 ther hand\, superfluid dislocations in 4-He are an important subject for t
 heir relevance to supersolid behavior observed in solid 4-He.\n\n//indico.
 ictp.it/event/a09230/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09230/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on  Disorder and strong electron correlations: "Nernst eff
 ect and dimensionality in the  quantum limit and beyond"\n\n
DTSTART;VALUE=DATE-TIME:20091022T100000Z
DTEND;VALUE=DATE-TIME:20091022T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09232@ictp.it
DESCRIPTION:Because of their very small carrier density\, bismuth and grap
 hite allow to attain the quantum limit in a bulk metal with available magn
 etic fields.  The fate of a three-dimensional electron gas pushed to this 
 ultra-quantum regime remains an open question.\nRecent measurements of the
  Nernst effect in graphite and in graphene combined to what was reported i
 n bulk bismuth a few years ago\, and in two-dimensional electron systems a
  decade earlier\, permits to draw a striking correlation between the field
  profile of the Nernst response and dimensionality.  When a Landau level i
 ntersects the Fermi level\, the Nernst signal peaks in three-dimensional s
 ystems and vanishes in two-dimensional systems.   We argue that this quali
 tative difference is a signature of a topological phase transition exclusi
 ve to three-dimensional systems.\nBeyond the quantum limit\, when all carr
 iers are confined to the first Landau level\, Nernst effect in bismuth det
 ects field scales\, which are not expected in the one-particle picture.  T
 he field profile of these anomalies points to a bulk origin. According to 
 our recent angular-dependent Nernst measurements\, the band picture is qui
 te successful in explaining the complex electronic spectrum of bismuth up 
 to 9 T\, but is inadequate as the quantum limit is crossed.  In particular
 \, in the vicinity of 40 T\, that is more than four times the quantum limi
 t\, large anomalies in all transport properties point to an enigmatic reor
 ganization of bulk electrons. Unexpectedly\, this electronic instability l
 eads to an enhanced conductivity and a better  metallicity.\n\n//indico.ic
 tp.it/event/a09232/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09232/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on  Disorder and strong electron correlations: "On electro
 n magnetism of antiferromagnetic conductors"\n\n
DTSTART;VALUE=DATE-TIME:20091029T100000Z
DTEND;VALUE=DATE-TIME:20091029T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09238@ictp.it
DESCRIPTION:Essential dependence of the electron g-factor on the quasipart
 icle momentum is a fundamental and\, so far\, largely overlooked property 
 of antiferromagnetic conductors.  I will discuss its symmetry underpinning
 s and some of its experimental consequences.\n\nThe predictions may be rel
 evant to a number of antiferromagnetic conductors\, ranging from chromium 
 to electron- and hole-doped cuprates\, borocarbides\, iron pnictides\, org
 anic and heavy fermion materials.\n\n//indico.ictp.it/event/a09238/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09238/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR on Disorder and Strong Electron Correlations: "Topological
  quantum criticality of Dirac fermions: From graphene to topological insul
 ators"\n\n\n
DTSTART;VALUE=DATE-TIME:20091105T100000Z
DTEND;VALUE=DATE-TIME:20091105T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09240@ictp.it
DESCRIPTION:Critical phenomena and quantum phase transitions are paradigma
 tic concepts in modern condensed matter physics. A central example in the 
 field of mesoscopic physics is the localization-delocalization (metal-insu
 lator) quantum phase transition driven by disorder -- the Anderson transit
 ion. Although the notion of localization has appeared half a century ago\,
  this field is still full of surprising new developments.  In this talk\, 
 I will discuss novel materials---graphene and topological insulators---whe
 re the charge carriers have a character of 2D Dirac fermions. A non-trivia
 l topological nature of the corresponding theories leads to remarkable phy
 sical consequences. In graphene\, the charge carriers turn out to be topol
 ogically protected from Anderson localization\, as long as the intervalley
  scattering can be neglected. A similar phenomenon takes place for surface
  modes of a 3D topological insulator. Furthermore\, we show that\, in the 
 latter system\, the Coulomb interaction leads to emergence of a quantum cr
 itical state. Remarkably\, the interaction-induced critical state emerges 
 on the surface of a three-dimensional topological insulator without any ad
 justable parameters. This ``self-organized quantum criticality'' is a nove
 l concept in the field of interacting disordered systems. Finally\, we pre
 dict a quantum spin-Hall transition between the normal and topological ins
 ulator phases in 2D that occurs via a similar (or identical) quantum criti
 cal point.\n\n//indico.ictp.it/event/a09240/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09240/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Journal Club Seminar on Disorder and strong electron correlations:
  "Purely electronic transport in strongly disordered\, but nearly supercon
 ducting insulators"\n\n
DTSTART;VALUE=DATE-TIME:20091106T100000Z
DTEND;VALUE=DATE-TIME:20091106T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09243@ictp.it
DESCRIPTION:Certain strongly disordered superconducting films\, when drive
 n insulating by reducing thickness or by a small perpendicular magnetic fi
 eld\, are believed to maintain a strong pairing of electrons into localize
 d Cooper pairs\, the phase transition to an insulator merely signaling the
  loss of phase coherence across the sample.  The ensuing bosonic insulator
  has a variety of very peculiar properties: empirically\, it is found to e
 xhibit a simply activated resistance of purely electronic nature.\nI will 
 analyze the new question of the spectral properties of the disordered inte
 racting system across the phase transition in the light of the phenomenon 
 of localization in Fock space. This analysis leads to a possible explanati
 on of the above-mentioned properties in terms of localized Cooper pairs wh
 ich couple only very weakly to phonons. Open and controversial issues will
  be discussed.\n\nREFERENCES:\n\nM. Müller\, arXiv:0909.2260\nI.L. Aleine
 r\, B.L. Altshuler\, G.V. Shlyapnikov\, arXiv:0910.4534\n\n//indico.ictp.i
 t/event/a09243/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09243/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "The energy landscap
 e of glassy systems or Long time dynamics in mean field glassy models"
DTSTART;VALUE=DATE-TIME:20091110T100000Z
DTEND;VALUE=DATE-TIME:20091110T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09242@ictp.it
DESCRIPTION:Mean field glassy system have been the subject of much studies
  over the last decades. They arise as mean field models for the glass tran
 sition\, but also as models for complex systems and optimization problems.
  Their thermodynamics properties can be solve using the replica\, or the c
 avity method.\n\nIn this talk\, I will introduce a generalization of the c
 avity method that allows to follow Gibbs states in mean field systems when
  an external parameter\, e.g. the temperature\, is tuned. The method thus 
 yields a "static" way to study long time "dynamics" in mean field models o
 f glass formers\, spin glasses\, or random constraint satisfaction problem
 s. In optimization problems the method gives limits for the performance of
  the simulated annealing algorithm. It also gives new results on the stabi
 lity and the marginality of the non-equilibrium states\, on the spinodal p
 oint upon heating\, and allow to demonstrate the presence of temperature c
 haos.\n\nReference : Krzakala\, Zdeborova \; arXiv:0909.3820v1.\n\n//indic
 o.ictp.it/event/a09242/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09242/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on  Statistical Physics: "From vicious walkers to
  random matrix theory:  A path-integral approach"\n\n
DTSTART;VALUE=DATE-TIME:20091111T150000Z
DTEND;VALUE=DATE-TIME:20091111T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09246@ictp.it
DESCRIPTION:Vicious\, i.e. non-intersecting\, random walkers have been stu
 died in various physical situations\, ranging from wetting and melting to 
 stochastic growth processes.  In this talk\, I will present a method based
  on path integrals associated to free Fermions models to study such statis
 tical models.  In particular I will show how this allows for a physical de
 rivation of the connection between certain constrained vicious walkers and
  random matrix theory.  Besides I will use this method to calculate exactl
 y the distribution of the maximal height of p vicious walkers with and wit
 hout a wall.\n\n//indico.ictp.it/event/a09246/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09246/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Anderson lo
 calization of matter-waves in laser speckles"\n\n
DTSTART;VALUE=DATE-TIME:20091112T100000Z
DTEND;VALUE=DATE-TIME:20091112T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09253@ictp.it
DESCRIPTION:Predicted in 1958 by P. W. Anderson for electronic waves and l
 atter recognized as an ubiquitous phenomenon in wave physics\, the Anderso
 n localization effect has prompted an intense experimental and theoretical
  activity.   Since the 90’s\, such exponential localization effects have
  been reported in different types of waves (light waves\, microwaves\, sou
 nd waves…) and were directly observed with matter-waves very recently [1
 \,2].\n\nI will present in this seminar the scheme realized in Palaiseau w
 here the propagation of a Bose Einstein condensate along a one-dimensional
  waveguide is stopped in presence of a weak disorder.  A stationary state 
 is reached and the emblematic signature of AL (e.g. the exponential decay 
 in the tails) is directly observed by imaging.  The disorder potential is 
 created by laser speckle\, whose characteristics are well controlled.  Suc
 h control enables a good agreement with theoretical predictions [3].  This
  experiment is thus very promising in view of future extensions of the sch
 eme to higher dimensions (2D or 3D) or in the presence of interactions.\n\
 n   [1]  J. Billy et al. Nature 453 p. 891 (2008)\n   [2]  G. Roati et al.
  Nature 453 p. 895 (2008)\n   [3]  L. Sanchez-Palencia et al. Phys. Rev. L
 ett 98\, 210401 (2007)\n\n//indico.ictp.it/event/a09253/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09253/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Lieb-Liniger Bose g
 as as the non-relativistic limit of the sinh-Gordon model"
DTSTART;VALUE=DATE-TIME:20091117T100000Z
DTEND;VALUE=DATE-TIME:20091117T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09255@ictp.it
DESCRIPTION:Due to recent experimental achievements with trapped ultracold
  atoms\, the properties of the 1D non-relativistic Bose gas are of great i
 nterest. In many experimental setups the behaviour of the particles is ver
 y well described by the Lieb-Liniger model which in many aspects can be re
 garded as a theoretical benchmark in the research of integrable models. In
  spite of its integrability\, calculating correlation functions in the mod
 el is notoriously difficult. In the talk I will propose a novel approach t
 o compute expectation values and other physical quantities in the Lieb-Lin
 iger model. The method is based on the fact that in the repulsive case the
  S-matrix\, the Lagrangian and the operators can be obtained from a certai
 n non-relativistic limit of the sinh-Gordon model. This observation allows
  us to compute expectation values both at zero and finite temperature. Amo
 ng other results\, I present the computation of the three-body correlation
  function at finite temperature\, which is closely related to the recombin
 ation rate of the gas.\n\n//indico.ictp.it/event/a09255/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a09255/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Excitations in bilayer
  graphene in high magnetic field"
DTSTART;VALUE=DATE-TIME:20091118T150000Z
DTEND;VALUE=DATE-TIME:20091118T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09257@ictp.it
DESCRIPTION:The charge-density excitations in bilayer graphene at the fill
 ing-factor  \n\n//indico.ictp.it/event/a09257/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09257/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Magnetic mo
 nopoles in spin ice"\n
DTSTART;VALUE=DATE-TIME:20091119T100000Z
DTEND;VALUE=DATE-TIME:20091119T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09256@ictp.it
DESCRIPTION:Electrically charged particles\, such as the electron\, are ub
 iquitous.  By contrast\, no elementary particles with a net magnetic charg
 e have ever been observed\, despite intensive and prolonged searches.\n\nA
 n alternative strategy is to realise them not as elementary but rather as 
 emergent particles\, i.e.\, as manifestations of the correlations present 
 in a strongly interacting many-body system.  Indeed\, it turns out  that m
 agnetic monopoles do emerge in a class of exotic magnets known collectivel
 y as spin ice: the dipole moment of the underlying electronic degrees of f
 reedom fractionalises into monopoles!  These monopoles can in principle be
  detected in an experiment modelled after the celebrated Stanford search f
 or magnetic monopoles of cosmic origin.  The many-body state of spin ice\,
  in turn\, represents a  new type of  phase outside the standard classific
 ation of magnetic order and disorder.\n\nReference: C. Castelnovo\, R. Moe
 ssner and S. L. Sondhi\, Nature 451\, 42 (2008).\n\n//indico.ictp.it/event
 /a09256/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09256/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Bogoliubov Theory o
 f acoustic Hawking radiation in Bose-Einstein Condensates"
DTSTART;VALUE=DATE-TIME:20091124T100000Z
DTEND;VALUE=DATE-TIME:20091124T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09261@ictp.it
DESCRIPTION:We apply the microscopic Bogoliubov theory of dilute Bose-Eins
 tein condensates to analyze quantum and thermal fluctuations in a flowing 
 atomic condensate in the presence of a sonic horizon. For the simplest cas
 e of a step-like horizon\, closed-form analytical expressions are found fo
 r the spectral distribution of the analog Hawking radiation and for the de
 nsity correlation function. The peculiar long-distance density correlation
 s that appear as a consequence of the Hawking emission features turns out 
 to be reinforced by a finite initial temperature of the condensate. The an
 alytical results are in good quantitative agreement with first principle n
 umerical calculations.\n\n//indico.ictp.it/event/a09261/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09261/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR - SPECIAL SEMINAR: "U
 nbalanced strongly interacting Fermi gas"
DTSTART;VALUE=DATE-TIME:20091126T100000Z
DTEND;VALUE=DATE-TIME:20091126T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09262@ictp.it
DESCRIPTION:We study the zero temperature properties of a trapped polarize
 d Fermi gas at unitarity by assuming phase separation between an unpolariz
 ed superfluid and a polarized normal phase. The effects of the interaction
  are accounted for using the formalism of quasiparticles to build up the e
 quation of state of the normal phase. Our predictions for the Chandrasekha
 r-Clogston limit of critical polarization and for the density profiles\, i
 ncluding the density jump at the interface\, are confirmed with excellent 
 accuracy by the recent experimental results. The role of interaction on th
 e radial width of the minority component\, on the gap of spectral function
 s\, and on the spin oscillations in the normal phase is also discussed. Ou
 r analysis points out the Fermi liquid nature of these strongly interactin
 g spin-polarized configurations.\n\n//indico.ictp.it/event/a09262/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09262/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Interactive Learnin
 g"
DTSTART;VALUE=DATE-TIME:20091201T100000Z
DTEND;VALUE=DATE-TIME:20091201T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09265@ictp.it
DESCRIPTION:I present a quantitative approach to interactive learning and 
 adaptive behavior\, which integrates model- and decision-making into one t
 heoretical framework. This approach follows simple principles by requiring
  that the observers behavior and the observers internal representation of 
 the world should result in maximal predictive power at minimal complexity.
  Classes of optimal action policies and of optimal models can be derived f
 rom an objective function that reflects this trade-off between prediction 
 and complexity. The resulting optimal models then summarize\, at different
  levels of abstraction\, the process causal organization in the presence o
 f the feedback due to the learners actions. A fundamental consequence of t
 he proposed principle is that the optimal action policies have the emergin
 g property that they balance exploration and control. Interestingly\, the 
 explorative component is present also in the absence of policy randomness\
 , i.e. in the optimal deterministic behavior. Exploration is therefore not
  the same as policy randomization. This is a direct result of requiring ma
 ximal predictive power in the presence of feedback. It stands in contrast 
 to\, for example\, Boltzmann exploration\, which is frequently used in Rei
 nforcement Learning (RL). Time permitting\, I will discuss what happens wh
 en one includes explicit goals and rewards into the theory\, as is popular
  in RL.\n\n//indico.ictp.it/event/a09265/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a09265/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "A 'quantum 
 mechanical' view on the dynamical glass transition"
DTSTART;VALUE=DATE-TIME:20091203T100000Z
DTEND;VALUE=DATE-TIME:20091203T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09267@ictp.it
DESCRIPTION:Using the mapping from the Fokker-Planck description of classi
 cal stochastic dynamics into a quantum Hamiltonian\, we argue that a dynam
 ical glass transition can be given a precise definition in terms of a stat
 ic (equilibrium) quantum phase transition. This transition is characterize
 d by a massive collapse of the excited states\, leading to a divergent sta
 tic quantum susceptibility throughout the glassy phase\, which directly re
 lates to a non-vanishing Edwards-Anderson order parameter.  The quantum me
 chanical language allows to search for off-diagonal order parameters to de
 tect the classical ‘dynamic order’ using transverse bases – an appro
 ach that corresponds to non-static observables in the original classical l
 anguage.  Even in the absence of a local order parameter\, the transition 
 can be detected via quantum fidelity measures on the ground state wavefunc
 tion\, which we show to translate directly into a singularity in the heat 
 capacity of the classical system.\n\n//indico.ictp.it/event/a09267/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09267/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Journal Club seminar on Disorder and strong electron correlations:
  "A geometrical derivation of entanglement entropy using the AdS/CFT corre
 spondence"
DTSTART;VALUE=DATE-TIME:20091204T100000Z
DTEND;VALUE=DATE-TIME:20091204T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09268@ictp.it
DESCRIPTION:The entanglement entropy of a quantum critical system in d+1-d
 imensions described by a Conformal Field Theory is calculated as the "area
 " of a d-dimensional minimal surface in a d+2-dimensional Anti-deSitter sp
 ace. This formulation is analogous to the Bekenstein-Hawking formula for t
 he black hole entropy.\n\nReference: S. Ryu and T. Takayanagi\, PRL 96\, 1
 81602 (2006)\n\n//indico.ictp.it/event/a09268/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09268/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Graphene el
 ectronics"\n
DTSTART;VALUE=DATE-TIME:20091211T100000Z
DTEND;VALUE=DATE-TIME:20091211T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09270@ictp.it
DESCRIPTION:Graphene is a new material consisting of a one-atom-thick laye
 r of graphite.  It has been discovered only a few years ago and since its 
 discovery it has shown to possess many unique and fascinating properties. 
 These properties are a consequence of the fact that electrons in graphene 
 effectively behave as massless relativistic electrons\, whose dynamics is 
 described by the two-dimensional Dirac equation.  In this talk I will firs
 t introduce the field\, by explaining in some detail how the electronic pr
 operties of graphene originate\, how they manifest themselves in the exper
 iments\, and how the experiments are actually done.  I will then move to d
 iscuss more specific topics that we have investigated during the past few 
 years. These include phase coherent transport of electrons (Aharonov-Bohm 
 effect\, weak-localization\, Josephson supercurrent)\, finite conductivity
  at the charge neutrality point\, and gate-tunable band structure.  Taken 
 together\, these examples make clear that graphene (single-layers as well 
 as materials consisting of a small number of layers) indeed is a unique ma
 terial system\, in which the discovery of new physical phenomena can be ex
 pected\, and which could be of use in future electronic applications.\n\n/
 /indico.ictp.it/event/a09270/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a09270/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Algorithmic complex
 ity and quantum dynamics"
DTSTART;VALUE=DATE-TIME:20091215T100000Z
DTEND;VALUE=DATE-TIME:20091215T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a09271@ictp.it
DESCRIPTION:Algorithmic complexity is a powerful tool that\, in the realm 
 of classical dynamical systems\, gives solid ground to the intuitive notio
 ns of chaoticness and randomness. Possible generalizations to quantum dyna
 mical systems will be presented and discussed within the context of quantu
 m information theory.\n\n//indico.ictp.it/event/a09271/
LOCATION:Lecture Room D - SISSA Main Building
URL://indico.ictp.it/event/a09271/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Casimir effects: Ph
 ysical manifestations of the quantum vacuum"
DTSTART;VALUE=DATE-TIME:20100119T100000Z
DTEND;VALUE=DATE-TIME:20100119T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a104@ictp.it
DESCRIPTION:The forces and torques among macroscopic objects caused by flu
 ctuating quantum fields are known as Casimir effects after the Dutch theor
 etician who discovered them in the late 1940's.  Recent high precision exp
 eriments and emerging micro-electromechanical applications have generated 
 great interest in the nature\, properties\, and manipulation of Casimir ef
 fects.  I will discuss the origins\, interpretation\, and computation of C
 asimir effects.  In particular I will outline the development of a powerfu
 l method to compute Casimir forces and torques based on classical scatteri
 ng theory.  I will survey some of the results obtained with these methods.
 \n\n//indico.ictp.it/event/a104/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a104/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Effects of isotopic ma
 ss and temperature on the optical properties of semiconductors"
DTSTART;VALUE=DATE-TIME:20100120T150000Z
DTEND;VALUE=DATE-TIME:20100120T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a102@ictp.it
DESCRIPTION:The state of the art calculations of the dielectric function o
 f semiconductors will be reviewed and compared with extant experimental da
 ta. Most of the comparisons available in the literature suffer from the fa
 ct that the calculations are performed with the atoms at fixed lattice pos
 itions\, whereas the experimental data are often taken at room temperature
 . Even when the latter have been obtained at low temperatures\, close to 0
 K\, they are affected by the zero-point vibrations\, a quantum mechanical 
 effect which can be varied by changing the isotopic masses of the constitu
 ent atoms. In recent years samples with different isotopic compositions ha
 ve become available. Measurements on such samples make possible to determi
 ne the renormalization of the dielectric function and other physical prope
 rties effected by the lattice vibrations (zero point and temperature effec
 ts). This renormalization is particularly large in crystals with light ato
 ms (diamond\, ZnO\, GaN)\, a fact that signals a rather strong electron ph
 onon interaction. This strong interaction is responsible for the supercond
 uctivity recently observed in boron-doped diamond (also Si and SiC).\n\n//
 indico.ictp.it/event/a102/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a102/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Scattering theory approa
 ch to  electrodynamic Casimir interactions"\n
DTSTART;VALUE=DATE-TIME:20100121T100000Z
DTEND;VALUE=DATE-TIME:20100121T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a108@ictp.it
DESCRIPTION:We have derived methods for calculating the Casimir force to a
 rbitrary accuracy\, for any number of objects\, arbitrary shapes\, suscept
 ibility functions\, and separations.  The technique is applicable to objec
 ts immersed in media other than vacuum\, nonzero temperatures\, and spatia
 l arrangements in which one object is enclosed in another.  The method com
 bines each object's classical electromagnetic scattering amplitude with un
 iversal translation matrices\, which convert between the bases used to cal
 culate scattering for each object\, but are otherwise independent of the d
 etails of the individual objects.  We have explored various novel geometri
 es using these techniques\, including objects interacting with cavities an
 d objects with sharp edges.\nThe method is further used to examine whether
  fluctuation-induced forces can lead to stable levitation. Neglecting perm
 eabilities\, we find that any equilibrium position of items subject to suc
 h forces is also unstable if the permittivities of all objects are higher 
 or lower than that of the enveloping medium\; the former being the generic
  case for ordinary materials in vacuum. Thus\, the Casimir force cannot pr
 oduce stable equilibria in vacuum for ordinary materials.\n\n//indico.ictp
 .it/event/a108/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a108/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "The amazing unitary
  Fermi gas"
DTSTART;VALUE=DATE-TIME:20100126T100000Z
DTEND;VALUE=DATE-TIME:20100126T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a103@ictp.it
DESCRIPTION:We discuss the amazing properties of the unitary Fermi gas\, w
 hich is the dilute and ultracold gas of fermions with infinite scattering 
 length. Then\, we illustrate the zero-temperature density functional of th
 e unitary Fermi gas we have recently introduced on the basis of Monte Carl
 o calculations. This functional includes a gradient term which is essentia
 l to describe accurately the surface effects of the system\, in particular
  with a small number of atoms. We analyze in detail the role of this gradi
 ent term for the determination of density profiles and collective modes. F
 inally\, we investigate the low-temperature thermodynamics of the unitary 
 Fermi gas by using the zero-temperature spectra of both bosonic collective
  modes and fermonic single-particle excitations. We determine the superflu
 id fraction\, the critical temperature\, the first sound and the second so
 und\, comparing our analytical results with other theoretical predictions 
 and experimental data.\n\n//indico.ictp.it/event/a103/
LOCATION:SISSA Main Bldg.-Lecture Room'D'
URL://indico.ictp.it/event/a103/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "On the collective b
 ehaviour of  large numbers of flying birds:  The case of Sturnus vulgaris"
 \n
DTSTART;VALUE=DATE-TIME:20100128T133000Z
DTEND;VALUE=DATE-TIME:20100128T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1014@ictp.it
DESCRIPTION://indico.ictp.it/event/a1014/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a1014/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Spin tensor
  phases in frustrated magnets"
DTSTART;VALUE=DATE-TIME:20100128T100000Z
DTEND;VALUE=DATE-TIME:20100128T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1015@ictp.it
DESCRIPTION:Strong geometrical frustration precludes conventional magnetic
  ordering.  A common outcome is a completely disordered spin-liquid state 
  at zero and at low temperatures.  Another interesting possibility is a pa
 rtial breaking of spin rotational symmetry described by spin-tensor order 
 parameters.  We shall discuss two examples of such unusual symmetry breaki
 ng.  The first model example is a classical Heisenberg antiferromagnet on 
 a kagome lattice [1].  At low temperatures the order by disorder mechanism
  selects a submanifold of planar spin states which are described by non-ze
 ro octupole moments.  An interesting consequence of such a third-rank tens
 or order parameter is presence of various types of fractional vortices.  T
 he second example is a system of weakly coupled spin-1/2 frustrated ferrom
 agnetic chains [2].  The high-field transition from the saturated phase oc
 curs via condensation of bound magnon pairs.  Such a condensate of is desc
 ribed by spin-nematic or second-rank tensor.  We develop analytical theory
  for the bose condensation into nematic state and argue that corresponding
  transition is realized in LiCuVO4.\n\n[1] M. E. Zhitomirsky\, Phys. Rev. 
 B {78}\, 094423 (2008).\n [2] H. Tsunetsugu and M. E. Zhitomirsky\, in pro
 gress (2010).\n\n//indico.ictp.it/event/a1015/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a1015/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Quantum quenches in
  interacting theories"
DTSTART;VALUE=DATE-TIME:20100202T100000Z
DTEND;VALUE=DATE-TIME:20100202T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1023@ictp.it
DESCRIPTION:The time evolution following a quantum quench\, i.e. an instan
 taneous change in the parameters of an isolated quantum system\, has been 
 shown to lead\, in a wide range of models and under quite general conditio
 ns\, to stationary behaviour with some thermal characteristics.  After a r
 eview of free field theory results that introduces necessary new concepts 
 and tools\, we investigate a quantum quench in the phi^4 model in a self-c
 onsistent approximation.  A direct application of perturbation theory is n
 ot suitable in this case and resummation of Feynman diagrams is needed.  W
 e propose an ansatz for the long time behaviour of the system\, which we v
 erify by a self-consistency calculation and numerical integration of the e
 quations of motion.\n\n//indico.ictp.it/event/a1023/
LOCATION:SISSA - Lecture Room 'D'
URL://indico.ictp.it/event/a1023/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/Democritos Informal Seminar on Chemical Physics:\n"Elec
 tronic structure and thermal properties of semiconductor early transition 
 metal nitrides"
DTSTART;VALUE=DATE-TIME:20100202T130000Z
DTEND;VALUE=DATE-TIME:20100202T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1024@ictp.it
DESCRIPTION://indico.ictp.it/event/a1024/
LOCATION:ICTP Leonardo da Vinci Building Oppenheimer Meeting Room
URL://indico.ictp.it/event/a1024/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Spin glass 
 transition in geometrically frustrated antiferromagnets with weak disorder
 "
DTSTART;VALUE=DATE-TIME:20100204T100000Z
DTEND;VALUE=DATE-TIME:20100204T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1025@ictp.it
DESCRIPTION:We study the effect in geometrically frustrated antiferromagne
 ts of weak\, random variations in the strength of exchange interactions.  
 Without disorder the simplest classical models for these systems have macr
 oscopically degenerate ground states\, and this degeneracy may prevent ord
 ering at any temperature. Weak exchange randomness favours a small subset 
 of these ground states and induces a spin-glass transition at an ordering 
 temperature determined by the amplitude of modulations in interaction stre
 ngth. We use the replica approach to formulate a theory for this transitio
 n\, showing that it falls into the same universality class as conventional
  spin-glass transitions. In addition\, we show that a model with a low con
 centration of defect bonds can be mapped onto a system of randomly located
  pseudospins that have dipolar effective interactions.  We also present de
 tailed results from Monte Carlo simulations of the classical Heisenberg an
 tiferromagnet on the pyrochlore lattice with weak randomness in nearest ne
 ighbour exchange.\n\n//indico.ictp.it/event/a1025/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a1025/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Game theory and net
 works"
DTSTART;VALUE=DATE-TIME:20100209T100000Z
DTEND;VALUE=DATE-TIME:20100209T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1031@ictp.it
DESCRIPTION:The framework of non-cooperative game theory has been recently
  extended to study strategic behavior in complex socio-economic networks. 
  However\, the existence of a large number of (very different) Nash equili
 bria makes standard game theoretic analysis cumbersome and quantitatively 
 less effective. On the other hand\, it opens to the application of advance
 d theoretical and algorithmic techniques from the statistical mechanics of
  disordered systems.\nI will discuss our recent results on the problem of 
 free-riding in public goods games and on the emergence of collaborative eq
 uilibria.\n\n//indico.ictp.it/event/a1031/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a1031/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Strongly co
 rrelated states in  low dimensional Bose gases"\n\n
DTSTART;VALUE=DATE-TIME:20100211T100000Z
DTEND;VALUE=DATE-TIME:20100211T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1034@ictp.it
DESCRIPTION:Ultracold atoms can be trapped in strongly confined low dimens
 ional trap geometries like (1D) cigars and (2D) pancakes: this allows for 
 to experimentally simulate Hamiltonians having strongly correlated ground 
 states.  The 1D Bose gas is well described by the so called Lieb-Liniger H
 amiltonian: in the talk I will discuss a recently proposed method to compu
 te expectation values and other physical quantities.  The method is based 
 on the observation that the S-matrix and the Lagrangian of the Lieb-Linige
 r model can be obtained as a non-relativistic limit of an integrable relat
 ivistic field theory\, the sinh-Gordon model.  In the final part of the ta
 lk\, I will briefly discuss the effect of an experimentally realizable art
 ificial non-abelian magnetic field acting on a 2D ultracold atomic gas\, s
 howing that it is possible to tune the Hamiltonian parameters in order to 
 have non-abelian excitations.\n\n//indico.ictp.it/event/a1034/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a1034/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Exact entanglement 
 entropy of the  XYZ model and its sine-Gordon limit"\n
DTSTART;VALUE=DATE-TIME:20100216T100000Z
DTEND;VALUE=DATE-TIME:20100216T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1037@ictp.it
DESCRIPTION:We obtain the exact expression for the Von Neumann entropy for
  an infinite bipartition of the XYZ model\, by connecting its reduced dens
 ity matrix to the corner transfer matrix of the eight vertex model.  Then 
 we consider the anisotropic scaling limit of the XYZ chain that yields the
  1+1 dimensional sine-Gordon model. We present the formula for the entangl
 ement entropy of the latter\, which has the structure of a dominant logari
 thmic term plus a constant\, in agreement with what is generally expected 
 for a massive quantum field theory.\n\n//indico.ictp.it/event/a1037/
LOCATION:SISSA Main Bldg.- Room 'D'
URL://indico.ictp.it/event/a1037/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "What makes superconduc
 tivity happen at high temperature?"\n
DTSTART;VALUE=DATE-TIME:20100217T150000Z
DTEND;VALUE=DATE-TIME:20100217T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1033@ictp.it
DESCRIPTION:Superconductivity and magnetism are often considered as antago
 nistic phenomena.  Indeed the phenomenon of superconductivity is usually o
 bserved in materials showing no instabilities toward magnetic order of any
  kind.  However\, in recent decades several new classes of superconductors
  have been discovered where superconductivity occurs on the brink of magne
 tic order\, and in a limited number of examples coexistence of superconduc
 tivity and ferromagnetism has even been claimed.  In many of these new mat
 erials the Cooper-pairs were observed and/or predicted to have finite angu
 lar momentum\, and sometimes even finite spin.  The field of superconducti
 vity has\, so to speak\, become very 'rich' and ever so more fascinating. 
  In this Colloquium I will\, based on the state of affairs in unconvention
 al superconductivity\, argue in favour of the scenario where high temperat
 ure superconductivity arises from pairing mediated through the virtual exc
 hange of spin fluctuations.  This is born out by a vast body of experiment
 al data obtained worldwide using photo-electron spectroscopy\, tunnelling 
 and optics.  These experiments have enabled the community to establish the
  temperature and energy dependence of the dissipation and the mass renorma
 lization of the charge carriers in various materials including the high Tc
  superconductors.  Based on the energy range observed for the inelastic sc
 attering\, it is now possible to eliminate phonon mediated pairing as 'the
 ' mechanism of superconductivity in the cuprates\, and provide quantitativ
 e arguments in favour of the thesis that superconductivity in these materi
 als is driven by proximity to magnetic (or stripe) instability.\n\n//indic
 o.ictp.it/event/a1033/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a1033/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR on  Disorder and strong electron correlations: "Non-abelia
 n anyons and topological quantum computation"
DTSTART;VALUE=DATE-TIME:20100218T100000Z
DTEND;VALUE=DATE-TIME:20100218T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1040@ictp.it
DESCRIPTION:The main topic of this seminar is the theory of non-Abelian an
 yons. The exotic statistical properties of such excitations make it possib
 le to set up quantum computational schemes based on robust topological pro
 perties as those of knots and braids. Although still in its infancy\, topo
 logical quantum computation promises to be the catalysis for a very produc
 tive merging of ideas coming from several fields of physics\, mathematics 
 and computer science.\n\n//indico.ictp.it/event/a1040/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a1040/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Explosive Percolati
 on"
DTSTART;VALUE=DATE-TIME:20100223T100000Z
DTEND;VALUE=DATE-TIME:20100223T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1042@ictp.it
DESCRIPTION:A biased link occupation rule discourages the growth of large 
 clusters much ahead of others and encourages faster growth of clusters whi
 ch lag behind. The resulting percolation transition\, proposed recently\, 
 is discontinuous\, and referred to as 'Explosive percolation'. We will dis
 cuss the results on a variety of graphs. We also introduce a new model wit
 h a single parameter alpha\, and show that the transition is discontinuous
  for alpha \n\n//indico.ictp.it/event/a1042/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a1042/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Criticality
 \, shocks and avalanches in spin glasses"\n
DTSTART;VALUE=DATE-TIME:20100225T100000Z
DTEND;VALUE=DATE-TIME:20100225T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1045@ictp.it
DESCRIPTION:The low temperature phase of spin glasses exhibits algebraical
 ly decaying spin-spin correlations at all T<Tc. This permanent criticality
  is an important hallmark of many glassy systems. It is closely related to
  the existence of a soft gap in the distribution of the local magnetic fie
 ld and implies the presence of collective low energy excitations.  At T=0\
 , when the magnetization is traced as a function of external field H\, fie
 ld-induced spin flips can trigger an avalanche of further spin flips. Here
 \, criticality is non-trivially encoded in the power law distribution of t
 he size of such events.  I will present an analytical theory for this phen
 omenon in the case of the SK spin glass\, and discuss analogies with other
  glassy systems such as pinned elastic systems and electron glasses.\n\n//
 indico.ictp.it/event/a1045/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a1045/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Journal Club seminar on Disorder and strong electron correlations:
  "How adiabatic quantum computation fails"
DTSTART;VALUE=DATE-TIME:20100226T100000Z
DTEND;VALUE=DATE-TIME:20100226T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1048@ictp.it
DESCRIPTION://indico.ictp.it/event/a1048/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a1048/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Discrete scale inva
 riance and  stochastic Loewner evolution"\n
DTSTART;VALUE=DATE-TIME:20100302T100000Z
DTEND;VALUE=DATE-TIME:20100302T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1047@ictp.it
DESCRIPTION:We will review briefly discrete scale invariance (DSI) and app
 lications.  Then using Weierstrass type functions as the drift of Loewner 
 equation we will propose some curves with DSI.  Using numerical calculatio
 ns we will offer some predictions for the properties of these curves.  Fin
 ally the contour lines of 2D Weierstrass function will be discussed as som
 e fractal curves with the similar properties.\n\n//indico.ictp.it/event/a1
 047/
LOCATION:SISSA - Lecture Room 'D'
URL://indico.ictp.it/event/a1047/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Slow noise 
 in Landau-Zener theory"
DTSTART;VALUE=DATE-TIME:20100304T100000Z
DTEND;VALUE=DATE-TIME:20100304T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1049@ictp.it
DESCRIPTION:We study the influence of a slow classical noise on Landau-Zen
 er transitions.  We demonstrate that the slow colored noise characterized 
 by correlation time much greater compared to Landau-Zener time can produce
  a transition itself\, or can change substantially the Landau-Zener transi
 tion probabilities.  Exact formulas for the time-evolution operator and fi
 nite time probabilities are derived. Connections between the slow noise in
 duced Landau-Zener transitions and recent experiments on spin blockade in 
 nano-devices are discussed.\n\n//indico.ictp.it/event/a1049/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1049/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Virus: A two-piece 
 bio-toy for physicists to play with"\n
DTSTART;VALUE=DATE-TIME:20100309T100000Z
DTEND;VALUE=DATE-TIME:20100309T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1052@ictp.it
DESCRIPTION:I will mainly review two works\, one on spherical protein "cag
 es'' and topological defects\, one on quantum effects on filamentous molec
 ules that can model\, for example\, DNA-DNA interactions.  The protein "ca
 ge" (capsid) and the genetic material (DNA or RNA) are the two essential c
 omponents of a virus.  This will be taken as an excuse to point to mayor c
 hallenges for theoretical physics in the arena of biological problems\, a 
 story that is as old as Schroedinger's lectures on physics and life (1943)
  but still unsolved.\n\n//indico.ictp.it/event/a1052/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1052/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Conformal l
 oop models and beyond"\n
DTSTART;VALUE=DATE-TIME:20100311T100000Z
DTEND;VALUE=DATE-TIME:20100311T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1056@ictp.it
DESCRIPTION:Conformal field theory has been very successful in describing 
 the low-energy properties of 2D statistical systems at their critical poin
 ts.  Among the most beautiful results in that field is the description of 
 geometrical properties at criticality. A famous example of this is the exa
 ct determination of the fractal dimension of magnetisation domains in the 
 Ising model.  Beyond the field theory toolbox\, a mathematically rigorous 
 description of such objects has been introduced in 2000: the Schramm-Loewn
 er Evolution (SLE).\nIn my talk I will give a simple introduction to these
  concepts in the context of loop models\, which are a 2D version of the sp
 in O(n) model in higher dimension.  I will focus on the surface critical b
 ehaviour of these models and the link with the SLE approach.  After that I
  will quickly present some recent results about the domain-walls in the Po
 tts model\, which are no longer loops but critically branching curves.\n\n
 //indico.ictp.it/event/a1056/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1056/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Ultracold atoms at 
 IQOQI:  6Li40K Fermi-Fermi mixtures &  Bose-Einstein condensation of stron
 tium"\n
DTSTART;VALUE=DATE-TIME:20100316T100000Z
DTEND;VALUE=DATE-TIME:20100316T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1058@ictp.it
DESCRIPTION:In this talk I will present two experiments\, one exploring 6L
 i40K Fermi-Fermi mixtures and the other quantum degenerate gases of stront
 ium.\nThe first experiment has the goal to create a new class of strongly 
 interacting many-body quantum systems.  To reach this goal\, we have ident
 ified the Feshbach resonances of the 6Li40K mixture and used those resonan
 ces to create heteronuclear molecules.  First experimental steps exploring
  the strongly interacting regime are reported.\nThe second experiment rece
 ntly created the first Bose-Einstein condensates of strontium. Our approac
 h to reach this long sought goal is presented and first steps towards ferm
 ionic degeneracy of 87Sr are reported.\n\n//indico.ictp.it/event/a1058/
LOCATION:Lecture Room'D' - SISSA Main Bldg.
URL://indico.ictp.it/event/a1058/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Local Hamiltonians 
 in quantum computation"
DTSTART;VALUE=DATE-TIME:20100323T100000Z
DTEND;VALUE=DATE-TIME:20100323T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1060@ictp.it
DESCRIPTION:This talk is about two Hamiltonian Complexity questions.  Firs
 t\, how hard is it to compute the ground state properties of quantum syste
 ms with local Hamiltonians (and will it be also hard to do on a quantum co
 mputer)?\nSecond\, which spin systems with time-independent (and perhaps\,
  translationally-invariant) local interactions could be used for universal
  computation (to build a computer)?\nI aim at a participant without previo
 us understanding of complexity theory\, and will discuss two locally-const
 rained quantum problems: k-local Hamiltonian and quantum k-SAT.  Learning 
 the techniques of Kitaev and others along the way\, the first message of t
 he talk is the understanding of QMA-completeness of these problems.  As a 
 second topic\, we will look at new universal constructions with a connecti
 on to Adiabatic Quantum Computing.\n\n//indico.ictp.it/event/a1060/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1060/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Aligning energy levels
  at the  TiO2 -water interface"\n
DTSTART;VALUE=DATE-TIME:20100324T150000Z
DTEND;VALUE=DATE-TIME:20100324T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1063@ictp.it
DESCRIPTION:When solids come in contact with water the band states in the 
 solid shift energy position.  For metal oxides this shift is moreover pH d
 ependent as a result of protonation or deprotonation of hydroxyl and water
  molecules adsorbed on the surface.  These surface potentials determine th
 e relative position of the electronic states of the solid with respect to 
 states of molecules or ions in solution.  This so-called band alignment pr
 oblem is therefore crucial for the understanding of the redox properties o
 f the interface.  In this talk we discuss our density functional theory ba
 sed molecular dynamics approach to this problem using the application to t
 he rutile TiO2 (110) water interface and the aqueous hydroxide anion as ex
 ample. The idea is to refer ionization potentials and electron affinities 
 to the solvation free energy of the proton in the same supercell establish
 ing an effective computational normal hydrogen electrode.  The solvation f
 ree energy of the proton is computed using a recently developed method for
  reversible proton insertion.\n\n//indico.ictp.it/event/a1063/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1063/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Charge and 
 spin transfer statistics of quantum impurity models"\n
DTSTART;VALUE=DATE-TIME:20100325T100000Z
DTEND;VALUE=DATE-TIME:20100325T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1065@ictp.it
DESCRIPTION:The full counting statistics (FCS) is a generalization of the 
 conventional electronic transport characteristics such as the non-linear c
 urrent-voltage relation or noise power. It is described by the probability
  of transferring a certain amount of electric charge during a fixed very l
 ong period of time.  It turns out to contain very sensitive information ab
 out the elementary charge of current carrying excitations as well as about
  the properties and nature of their mutual interactions.  We demonstrate t
 he power of the FCS technique applying it to the problem of inter-edge tun
 neling in the QHE bars\, to the electronic transport through the Kondo and
  Anderson impurities as well as for the conductance properties of the Ande
 rson-Holstein model.  We discuss the results and address the existing expe
 rimental data.\n\n//indico.ictp.it/event/a1065/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1065/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Classical statistic
 al mechanics approach to multipartite entanglements"
DTSTART;VALUE=DATE-TIME:20100330T100000Z
DTEND;VALUE=DATE-TIME:20100330T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1067@ictp.it
DESCRIPTION:Entanglement is one of the most intriguing features of quantum
  mechanics.  It is widely used in quantum communication and information pr
 ocessing and plays a key role in quantum computation.  At the same time\, 
 entanglement is not fully understood.  It is deeply rooted into the linear
 ity of quantum theory and in the superposition principle and (for pure sta
 tes) is essentially and intuitively related to the impossibility of factor
 izing the state of the total system in terms of states of its constituents
 .\nThe characterization and quantification of entanglement is an open and 
 challenging problem. One can give a good definition of bipartite entanglem
 ent in terms of the von Neumann entropy or the entanglement of formation. 
  The problem of defining multipartite entanglement is more difficult and n
 o unique definition exists.\nWe characterize the multipartite entanglement
  of a system of  n  qubits in terms of the distribution function of the bi
 partite purity over balanced bipartitions.  We search for maximally multip
 artite entangled states\, whose average purity is minimal\, and recast thi
 s optimization problem into a problem of statistical mechanics\, by introd
 ucing a cost function\, a fictitious temperature and a partition function.
   By investigating the high-temperature expansion\, we obtain the first th
 ree moments of the distribution.  We find that the problem exhibits frustr
 ation. \nWe focus on fundamental issues and possible applications.\n\n//in
 dico.ictp.it/event/a1067/
LOCATION:SISSA Main Bldg.\, Lecture Room 'D'
URL://indico.ictp.it/event/a1067/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "The crystal-melt inter
 face free energy from metadynamics"\n
DTSTART;VALUE=DATE-TIME:20100331T150000Z
DTEND;VALUE=DATE-TIME:20100331T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1068@ictp.it
DESCRIPTION:The solid-liquid interface free energy is a key parameter cont
 rolling nucleation and growth during solidification\, as well as the energ
 etics of wetting.  It is difficult to obtain experimentally\, and although
  there are computational approaches with atomistic simulation\, they are d
 ifficult to apply routinely.  We propose a new approach [1]\, which is to 
 obtain a free energy map of the phase transition by metadynamics [2].  We 
 have applied this to the benchmark case of a Lennard-Jones potential and t
 he results  confirm the most reliable data obtained previously.  This appr
 oach offers several advantages: it is simple to implement\,  robust and fr
 ee of hysteresis problems\, it provides a rigorous and unbiased estimate o
 f the statistical uncertainty and a good estimate of of the thermodynamic 
 limit  with system sizes of a just a few hundred atoms.  It is therefore a
 ttractive for using with more realistic and specific models of interatomic
  forces.\n\n[1] S. Angioletti-Uberti\, M. Ceriotti\, M.W. Finnis and P.D. 
 Lee\,  Solid-Liquid Interfacial Free Energy from Metadynamics simulations\
 ,  Phys. Rev. B\, to be published\n[2] A. Laio and M. Parrinello\, Escapin
 g free energy minima\, Proc. Natl. Acad. Sci. USA 99: 12562-12566 (2002)\n
 \n//indico.ictp.it/event/a1068/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1068/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Critical sc
 aling at the Anderson localization transition in the strong multifractalit
 y regime"\n
DTSTART;VALUE=DATE-TIME:20100409T100000Z
DTEND;VALUE=DATE-TIME:20100409T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1073@ictp.it
DESCRIPTION:We study dynamical scaling (DS) in disordered systems at (or c
 lose to) the point of the Anderson localization transition.  Wave function
 s of such systems are fractal.  DS is connected to strong spatial correlat
 ions of the wave functions.  These correlations are particularly nontrivia
 l in the strong fractality regime where fractals are very sparse.  It has 
 been conjectured [1] that there exists an exact relation between the expon
 ent of DS and the 2nd fractal dimension.  To the best of our knowledge\, n
 either existence of DS nor the relation between the exponents were checked
  analytically.\n\nWe study DS and the critical exponents in the strong fra
 ctality regime using the model of almost diagonal random matrices with fra
 ctal eigenstates by analyzing asymptotic behavior of the return probabilit
 y in the long time limit.  We have proven the DS to hold true up to the le
 ading terms of 2nd loop of RG. Besides\, we have found necessary condition
 s for the exact relation between the critical exponents.\n\n[1] J.T. Chalk
 er and G.J. Daniell\, Phys. Rev. Lett. 61\, 593 (1988)\; J.T. Chalker\, Ph
 ysica A 167\, 253 (1990).\n\n//indico.ictp.it/event/a1073/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1073/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Modified determinis
 tic equations derived from individual-based models"
DTSTART;VALUE=DATE-TIME:20100413T100000Z
DTEND;VALUE=DATE-TIME:20100413T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1072@ictp.it
DESCRIPTION:I discuss a systematic approach to the modeling of biological\
 , biochemical and related systems which starts from individual-based model
 s\, and then goes on to derive from these the corresponding deterministic 
 equations which are valid when the size of the system is large.  The forma
 lism also applies to spatially explicit models\, and I will compare the go
 verning deterministic equations for these systems to those which are norma
 lly written down on phenomenological grounds.  The case of the diffusion o
 f two types of particle\, where extra nonlinear terms reflect the depletio
 n of resources on which the particles rely\, will be examined in detail.\n
 \n//indico.ictp.it/event/a1072/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1072/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Dye-sensitized solar c
 ells:  Mechanism\, efficiency and open issues"\n
DTSTART;VALUE=DATE-TIME:20100414T150000Z
DTEND;VALUE=DATE-TIME:20100414T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1071@ictp.it
DESCRIPTION:Within today’s global challenge to capture and utilize solar
  energy for a sustainable development on a grand scale\, dye sensitized so
 lar cells (DSC)\, represent a particularly promising approach to the direc
 t conversion of light into electrical energy at low cost and with high eff
 iciency.  In these devices\,  a dye sensitizer absorbs the solar radiation
  and transfers the photoexcited  electron to a wide band-gap semiconductor
  electrode consisting of a mesoporous oxide layer composed of nanometer-si
 zed particles\, while the concomitant hole is transferred to the redox ele
 ctrolyte or to a hole conductor. Ruthenium(II) complexes are widely employ
 ed as dye sensitizers\, delivering record efficiencies in DSC.  For furthe
 r progress\, however\, higher conversion efficiencies need to be achieved.
   New sensitizers with tailored optical properties and a deeper understand
 ing of the interaction between the dye and the TiO2 nanostructured electro
 de are essential.\n\n//indico.ictp.it/event/a1071/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1071/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Quantum cri
 ticalities in vanadium chains:  A toy 1D spin-orbital model"\n
DTSTART;VALUE=DATE-TIME:20100415T100000Z
DTEND;VALUE=DATE-TIME:20100415T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1077@ictp.it
DESCRIPTION:In certain vanadium oxides\, the transition-metal atoms form w
 eakly coupled chains or ladders.  We propose a relevant 1D toy model\, dis
 cuss the interplay between the spin and orbital degrees of freedom in this
  system\, and analyze massive phases and quantum criticalities induced by 
 the local spin-orbit coupling.\n\n//indico.ictp.it/event/a1077/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1077/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Localizatio
 n of interacting bosons in a lattice: Competition between disorder and com
 mensurability"\n
DTSTART;VALUE=DATE-TIME:20100422T103000Z
DTEND;VALUE=DATE-TIME:20100422T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1084@ictp.it
DESCRIPTION:We establish the phase diagram of the disordered three-dimensi
 onal Bose-Hubbard model at unit filling\, which has been controversial for
  many years.  We prove the absence of a direct quantum phase transition be
 tween a superfluid and a Mott insulator in a bosonic system with generic\,
  bounded disorder: the Bose-glass phase always intervenes between the Mott
  insulating and superfluid phases.\nThis conclusion follows from a general
  theorem of inclusions\, which states that for any transition in a disorde
 red system\, one can always find rare regions of the competing phase on ei
 ther side of the transition line.  A highly nontrivial overall shape of th
 e phase diagram is revealed with the worm algorithm.  The phase diagram fe
 atures a long superfluid finger at strong disorder and on-site interaction
 .  Moreover\, bosonic superfluidity is extremely robust against disorder i
 n a broad range of interaction parameters\; it persists in random potentia
 ls nearly 50 (!) times larger than the particle half-bandwidth.\n\n//indic
 o.ictp.it/event/a1084/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1084/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Kondo effect in nanosc
 opic conductors with magnetic atoms"\n
DTSTART;VALUE=DATE-TIME:20100428T150000Z
DTEND;VALUE=DATE-TIME:20100428T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1085@ictp.it
DESCRIPTION:State of the art for calculating the current and conductance f
 or atomic- and molecular-size junctions consists in combining ab initio el
 ectronic structure calculations on the level of Density Functional Theory 
 (DFT) with the Landauer formalism.  This approach works quite well e.g. fo
 r metallic nanocontacts predicting zero-bias conductances that are in gene
 ral in good agreement with the experiments.  However\, this static mean-fi
 eld approach cannot capture dynamical electron correlations that lead e.g.
  to the Kondo effect observed in STM experiments with magnetic adatoms and
  molecules on metal surfaces and more recently in nanocontacts made from f
 erromagnetic transition metals. In order to describe the dynamical correla
 tions originating from the strongly interacting 3d-shells of transition me
 tal atoms we have developed a new method that combines DFT based electroni
 c structure calculations with  a fully dynamical treatment of the 3d-shell
 s of the magnetic atoms in the so-called One-Crossing Approximation.  I wi
 ll present results for Cu nanocontacts containing one or more magnetic imp
 urities in the contact region. The strong dynamic correlations of the 3d e
 lectrons lead to quasi-particle resonances near the Fermi level that in tu
 rn give rise to Fano lineshapes in the conductance characteristics similar
  to those observe in recent experiments.\n\n//indico.ictp.it/event/a1085/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1085/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar onDisorder and strong electron correlations\n"Polarization
  switching in nano-scale electronics: Ginzburg-Landau modelling approach"\
 n
DTSTART;VALUE=DATE-TIME:20100429T103000Z
DTEND;VALUE=DATE-TIME:20100429T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1086@ictp.it
DESCRIPTION:The spontaneous polarization in ferroelectric materials could 
 be expected to be completely destabilized by the backward depolarizing ele
 ctrostatic field produced by the charge rho=div P of the polarization surf
 ace breakdown.  This apparent paradox is avoided by the segregation of the
  sample into polarized domains with different orientation of polarization\
 , as was initially proposed by Landau and Kittel . This alternates the sur
 face charge and diminishes the bulk depolarizing field.\n\nTo model the po
 larization texture in realistic samples of size of 50-500nm we use an anal
 ytical approach solving the nonlinear Ginzburg-Landau equations coupled wi
 th the electrostatic equations. By variation of the external field we stud
 y the dynamics of polarization switching.  The description of the formatio
 n of domains\, vortices\, skyrmions\, etc. recently seen in experiment and
  in first-principle modeling is possible.  Introducing Landau-Khalatnikov 
 dynamics we study the formation and evolution of such topological textures
  and their role in polarization switching.\n\n//indico.ictp.it/event/a1086
 /
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1086/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "The cavity method f
 or quantum disordered systems"\n
DTSTART;VALUE=DATE-TIME:20100504T130000Z
DTEND;VALUE=DATE-TIME:20100504T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1092@ictp.it
DESCRIPTION:Motivated by the study of disordered superconductors\, we deve
 lop an analytical theory\, based on the quantum cavity method\, describing
  the quantum phase transitions of disordered systems.  A connection to the
  classical problem of directed polymers in random media shows the relevanc
 e of replica symmetry breaking effects.  Because of these effects\, variou
 s aspects of the zero temperature phase transition are very different from
  what is found in usual phase transitions\, and strong inhomogeneities pla
 y a crucial role.\n\n//indico.ictp.it/event/a1092/
LOCATION:SISSA\, Santorio\, Room 004
URL://indico.ictp.it/event/a1092/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Quantum-cri
 tical Kondo screening in graphene"\n
DTSTART;VALUE=DATE-TIME:20100506T103000Z
DTEND;VALUE=DATE-TIME:20100506T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1096@ictp.it
DESCRIPTION:Electrons in graphene provide an essentially perfect realizati
 on of 2d Dirac fermions. Introducing magnetic impurities then allows to st
 udy the so-called pseudogap Kondo effect\, where a vanishing host density 
 of states causes a quantum phase transition between phases with screened a
 nd unscreened impurity moment.  In the talk\, I will discuss the rich Kond
 o physics in graphene\, including orbital degrees of freedom and quantum c
 riticality. In particular\, I will analyze the pseudogap Kondo model in th
 e presence of a finite chemical potential.  A striking prediction of the t
 heory is an extreme asymmetry of impurity properties between electron and 
 hole doping over a wide parameter range which can be traced back to the na
 ture of the quantum critical point.\n\n//indico.ictp.it/event/a1096/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1096/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Critical exponents 
 of many-body quantum systems by means of the  Multiscale Entanglement Reno
 rmalization Ansatz"
DTSTART;VALUE=DATE-TIME:20100511T103000Z
DTEND;VALUE=DATE-TIME:20100511T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1097@ictp.it
DESCRIPTION:The selection of suitable tailored variational wavefunctions i
 s a fundamental problem in the study of quantum many-body systems.  Variat
 ional approaches based on tensor networks are a novel powerful numerical t
 ool believed to be the key ingredient to simulate efficiently quantum-many
  body systems. Among the proposed tensor networks\, a very promising one i
 s the so-called Multiscale Entanglement Renormalization Ansatz (MERA).  I 
 will discuss how to extract the critical exponents from the MERA ansatz an
 d apply the method to a number of one-dimensional spin models.\n\n//indico
 .ictp.it/event/a1097/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1097/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Towards computational 
 design of heterogeneous catalysts"
DTSTART;VALUE=DATE-TIME:20100512T150000Z
DTEND;VALUE=DATE-TIME:20100512T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1098@ictp.it
DESCRIPTION:Scaling relations are presented which have the capability to e
 stimate adsorbate-surface bond energies for hydrogen-containing molecules 
 on transition metal surfaces with reasonable accuracy. The relations provi
 de a method for estimating hydrogenation reaction energies\, leading to ne
 w possibilities in using electronic structure simulations in the search fo
 r new catalysts.  Using the selective hydrogenation of acetylene to ethyle
 ne as an example\, it is shown how the adsorption energy of one single spe
 cies can be used as a descriptor for the catalytic activity and selectivit
 y.  A number of alloys are investigated and new catalysts are singled out 
 and experimentally tested\, leading to the suggestion of new potential cat
 alysts not containing precious metals.  That scaling relations hold for ad
 sorption energies of molecules larger than one carbon atom\, suggests they
  can provide a method for treating the surface chemistry of more complex h
 ydrocarbons.  It is finally shown that the scaling model surprisingly can 
 be generalized to the surfaces of more complex materials such as oxides an
 d nitrides.\n\n//indico.ictp.it/event/a1098/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1098/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Effects of 
 superfluidity in  trapped Fermi gases"\n
DTSTART;VALUE=DATE-TIME:20100513T103000Z
DTEND;VALUE=DATE-TIME:20100513T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10101@ictp.it
DESCRIPTION:I will review some recent advances in the physics of strongly 
 interacting atomic Fermi gases\, including the main features of the BEC-BC
 S crossover\, the signatures  of superfluidity and the emergence of quantu
 m  magnetic phenomena like the phase separation  in polarized Fermi gases 
 and the ferromagnetic behavior of the repulsive gas.\n\n//indico.ictp.it/e
 vent/a10101/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10101/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "(3+1) massive Dirac
  fermions with ultracold atoms in optical lattice"\n
DTSTART;VALUE=DATE-TIME:20100525T150000Z
DTEND;VALUE=DATE-TIME:20100525T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10105@ictp.it
DESCRIPTION:I discuss a cold-atoms set-up able to simulate (3+1) Dirac fer
 mions and some applications\, relevant both in elementary particle and in 
 condensed matter physics. I show in particular the possibility to add a tu
 nable mass by using Bragg pulses\, an effective external electromagnetic c
 oupling and an internal interaction\, also covariant.\nFinally I consider 
 the 2D limit\, describing the emergence of (2+1) Dirac fermions in presenc
 e of a strongly anisotropic lattice.\n\n//indico.ictp.it/event/a10105/
LOCATION:SISSA\, Santorio\, Room 004 (Ground floor)
URL://indico.ictp.it/event/a10105/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar: "Y-junction connecting Luttinger liquids: \nFixe
 d point structure and conductances"\n
DTSTART;VALUE=DATE-TIME:20100526T151500Z
DTEND;VALUE=DATE-TIME:20100526T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10109@ictp.it
DESCRIPTION:We study the transport properties of three quantum wires (with
  possibly different interaction strength)\, connected through a Y-junction
 \, within the scattering state formalism.  We first formulate the problem 
 in current algebra language and focus on the case of a symmetric setup\, f
 or which the scattering matrix and the matrix of conductances is parametri
 zed by two variables.  For these we derive coupled RG equations\, performi
 ng a ladder summation up to infinite order in the interaction.  The fixed 
 point structure and the implicit solution of these equations is presented.
   We show that higher order terms beyond the ladder approximation do not c
 hange the scaling behavior near the fixed points.  For sufficiently strong
  attractive interaction a new fixed point with unusual properties is found
 .\n\n//indico.ictp.it/event/a10109/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10109/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "The equatio
 n of state of strongly interacting Fermi gases"\n\n
DTSTART;VALUE=DATE-TIME:20100527T103000Z
DTEND;VALUE=DATE-TIME:20100527T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10110@ictp.it
DESCRIPTION:In this talk\, we will present recent experimental work perfor
 med at ENS on the thermodynamics of strongly interacting 6Li Fermi gases. 
  We have developed a general method to probe with high precision the therm
 odynamics of locally homogeneous ultracold gases [1].  This allows stringe
 nt tests of recent many-body theories.  First\, we focus on the finite-tem
 perature Equation of State (EoS) of the unpolarized unitary gas.\nPrecise 
 thermometry is provided by adding to the trapped 6Li unitary gas a small a
 mount of bosonic 7Li that is weakly perturbing the system.  We show that t
 he low-temperature properties of the strongly interacting normal phase are
  well described by Fermi liquid theory and we localize the superfluid phas
 e transition.  Second\, we address the zero-temperature EoS of the spin-po
 larized system.  Surprisingly\, despite strong interactions\, the normal p
 olarized phase behaves as a mixture of two ideal gases: a Fermi gas of bar
 e majority atoms and a non-interacting gas of dressed quasi-particles\, th
 e Fermi polarons. Finally\, we will report on the extension of our study t
 o the BEC-BCS crossover in the low temperature limit [2].  A detailed comp
 arison with theories including Monte-Carlo calculations and the Lee-Huang-
 Yang corrections for low-density bosonic and fermionic superfluids is pres
 ented.  Our equation of state can be directly used to describe low density
  neutron matter such as the outer shell of neutron stars.\n\n[1] S. Nascim
 bène\, N. Navon\, K. Jiang\, F. Chevy\, and C. Salomon\, Nature 463\, 105
 7 (2010)\n[2] N. Navon\, S. Nascimbène\, F. Chevy\, and C. Salomon\,  Sci
 ence Express\, published on line April 15\, 2010\n\n//indico.ictp.it/event
 /a10110/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10110/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Localization\, anom
 alous diffusion and slow relaxations in disordered systems"\n
DTSTART;VALUE=DATE-TIME:20100608T103000Z
DTEND;VALUE=DATE-TIME:20100608T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10114@ictp.it
DESCRIPTION:We present a model\, that while simple to define\, shows rich 
 behavior that accounts for a variety of physical phenomena\, such as local
 ization of phonons\, anomalous diffusion\, and slow relaxations in glassy 
 systems.  The 'crux of the matter' lies in the fact that the rate of many 
 processes in nature is exponential in the relevant distance: quantum tunne
 ling is a common example.  If we think about a particle diffusing in a ran
 dom environment\, its dynamics will be described by a matrix A where the i
 \,j'th element is exponential in the distance between points i and j.  Thi
 s leads us naturally to the model of exponential random matrices\, which i
 s a novel ensemble of random matrices\, with interesting properties.  We s
 olve the model exactly\, and discuss the implications on the various physi
 cal problems.\n\n//indico.ictp.it/event/a10114/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10114/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar: "Quantum spin metal state on a  decorated honeyc
 omb lattice"\n
DTSTART;VALUE=DATE-TIME:20100609T150000Z
DTEND;VALUE=DATE-TIME:20100609T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10116@ictp.it
DESCRIPTION:We present a modification of exactly solvable spin-(1/2) Kitae
 v model on the decorated honeycomb lattice\, with a ground state of "spin 
 metal" type.  The model is diagonalized in terms of Majorana fermions\; th
 e latter form a 2D gapless state with a Fermi-circle those size depends on
  the ratio of exchange couplings.  Low-temperature heat capacity C(T) and 
 dynamic spin susceptibility \\chi(\\omega\,T) are calculated in the case o
 f small Fermi-circle.  Whereas C(T)\\sim T at low temperatures as it is ex
 pected for a Fermi-liquid\, spin excitations are gapful and \\chi(\\omega\
 ,T) demonstrate unusual behaviour with a power-law peak near the resonance
  frequency.  The corresponding exponent as well as the peak shape are calc
 ulated.\n\n//indico.ictp.it/event/a10116/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10116/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Magnetic an
 d color superfluid order in multiflavor Fermi gases"\n
DTSTART;VALUE=DATE-TIME:20100610T103000Z
DTEND;VALUE=DATE-TIME:20100610T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10115@ictp.it
DESCRIPTION:Cold atoms in optical lattices offer a new laboratory for quan
 tum many-body phenomena.  One of their main advantages is the tunability o
 f interactions and quantum statistics. In this talk I will focus on curren
 t developments in multiflavor Fermi gases:\ni) We investigate antiferromag
 netic ordering of trapped spin-1/2 fermions using large-scale dynamical me
 an-field theory simulations.  We find a clear experimental signature - enh
 anced double occupancy - for the onset of magnetic order at low temperatur
 es in current experiments.\nii) We study the properties of three-flavor fe
 rmions in an optical lattice\, where new exotic quantum states such as col
 or superfluids arise in partial analogy to Quantum Chromodynamics.  Low-te
 mperature properties of this system are addressed using DMRG and dynamical
  mean-field theory.  We find a strong interplay between magnetization and 
 color superfluidity.\n\n//indico.ictp.it/event/a10115/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10115/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Statistics of the Kolkat
 a Paise Restaurant problem"\n
DTSTART;VALUE=DATE-TIME:20100617T150000Z
DTEND;VALUE=DATE-TIME:20100617T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10121@ictp.it
DESCRIPTION:We will discuss the dynamics of stochastic learning strategies
  for the 'Kolkata Paise Restaurant' problem\, where N agents choose among 
 N equally priced but differently ranked restaurants every evening such tha
 t each agent tries get to dinner in the best restaurant (each serving only
  one customer and the rest arriving there going without dinner that evenin
 g).  Informations regarding the restaurant ques in the previous nights are
  available to everybody and each agent employs strategies in parallel to c
 hoose the respective restaurant every evening.  We consider the learning  
 strategies to be similar for all the agents and assume that each follow th
 e same probabilistic or stochastic strategy dependent on the information o
 f the past successes in the game.  We show that some 'naive' strategies le
 ad to much better utilization of the services than some relatively 'smarte
 r' strategies.  A "dictated "  solution to the problem is much more effici
 ent and quicker than the above- mentioned ("democratically arrived") solut
 ions.  Both numerical and analytical results will be discussed.\n\n\nRefs:
 \n1. A. S. Chakrabarti\, B. K. Chakrabarti\, A. Chatterjee & M. Mitra\, Ko
 lkata Paise Restaurant Problem & Resource Utilisation\, Physica A 388 (200
 9) 2420\n2. A. Ghosh & B. K. Chakrabarti\, Kolkata Paise Restaurant Proble
 m\, http://demonstrations.wolfram.com/KolkataPaiseRestaurantKPRProblem\n3.
  A. Ghosh\, A. Chatterjee\, M. Mitra & B. K. Chakrabarti \, Statistics of 
 Kolkata Paise Restaurant Problem\, New J. Phys. 12 (2010\; in press)\n\n//
 indico.ictp.it/event/a10121/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10121/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics:"Nucleation and growth in 
 binary mixtures: Revisiting symmetric cases"
DTSTART;VALUE=DATE-TIME:20100701T103000Z
DTEND;VALUE=DATE-TIME:20100701T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10182@ictp.it
DESCRIPTION:In this lecture\, I will describe kinetics of phase separation
  in symmetric binary mixtures.  Consequence of curvature dependent interfa
 cial tension will be discussed in the context of early time dynamics.\n\n/
 /indico.ictp.it/event/a10182/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10182/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Reliable computatio
 n by noisy Boolean formulas -  A statistical physics approach"\n
DTSTART;VALUE=DATE-TIME:20100706T103000Z
DTEND;VALUE=DATE-TIME:20100706T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10181@ictp.it
DESCRIPTION:Noise is inherent in most forms of computing and its impact is
  more dramatic as the computing circuits become more complex and of large 
 scale. Classical computing circuits suffer from thermal noise and producti
 on errors\, quantum computers suffer from decoherence\, whilst an understa
 nding of noisy processes\, inherent in neural networks and biological syst
 ems\, remains poorly understood.\nThe first model of noisy computation was
  proposed by von Neumann in 1956 who used circuits/formulas composed of no
 isy Boolean gates to gain insight into the robustness of biological neuron
 al networks. A noisy circuit cannot perform any given computation in a det
 erministic manner: for any circuit-input there is a non-vanishing probabil
 ity that the circuit will produce the wrong output. Von Neumann showed tha
 t reliable computation (probability of error \n\n//indico.ictp.it/event/a1
 0181/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10181/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Anomalous scaling l
 aws in coarsening with Hamiltonian microscopic dynamics"
DTSTART;VALUE=DATE-TIME:20100720T103000Z
DTEND;VALUE=DATE-TIME:20100720T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10209@ictp.it
DESCRIPTION:We study the effects of the range of interaction in coarsening
  dynamics\, both in the case of deterministic (Hamiltonian) and stochastic
  (Langevin) microscopic dynamics.  In both cases\, we confirm for our mode
 l the existence of a scaling regime\, during which the size of domains gro
 ws in time according to a power law. In the case of stochastic dynamics\, 
 the exponents are very close to those predicted in literature\, for the dy
 namics of the domain walls\, while for Hamiltonian dynamics we get differe
 nt values\, with a transition between super-linear growth (for weak-long r
 ange interactions) and sub-linear growth (for short-range interactions).\n
 \n---------------------------------------------------------------------\n\
 nIf you wish to meet with the speaker\, please contact andreatr@sissa.it\n
 \n//indico.ictp.it/event/a10209/
LOCATION:SISSA\, Santorio\, Room 138
URL://indico.ictp.it/event/a10209/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Section seminar: "Spin Ex
 citations in Strongly Correlated Electron Systems"\n\n
DTSTART;VALUE=DATE-TIME:20100806T150000Z
DTEND;VALUE=DATE-TIME:20100806T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10227@ictp.it
DESCRIPTION:One way to probe magnetic order is to measure spin excitations
 \, such as magnons\, by inelastic neutron scattering experiments\, and com
 pare them with those characteristic of each proposed magnetic phase. Here 
 we will describe our recent studies of magnetic excitations in two familie
 s of strongly correlated electron systems.\n\nFirst\, for half-doped colos
 sal magnetoresistance manganites\, I will report on our study of the spin 
 excitations of the CE phase originally proposed by J. Goodenough. Using a 
 localized spin model we calculated magnons for 3D-perovskite compounds suc
 h as La1-xMxMnO3\, where M=Ca\,Sr\,Ba\, and for their 2D-laminar counterpa
 rts\, as e.g. La0.5Sr1.5MnO4 .\n\nI will then briefly describe our study f
 or the magnons observed in heavy fermions with antiferromagnetic long-rang
 e order (Tneel~TKondo)\, concretely in CeIn3 and CePd2Si2 single crystals.
  We used a microscopic model including a lattice of correlated f-electron 
 orbitals (as in Ce\,U) hybridized with the conduction band\, with competin
 g RKKY (Heisenberg-like J H) and Kondo (JK) couplings.Through a series of 
 unitary transformations\, we perturbatively derived a second order effecti
 ve Hamiltonian which\, projected on the antiferromagnetic fermion ground s
 tate\, describes the spin wave excitations\, renormalized by their interac
 tion with the conduction electrons. Our calculated magnon dispersion relat
 ions agree well with the experimental data in cubic CeIn 3 [M.Acquarone\, 
 C.I.Ventura\, Journal of Mag. & Magnetic Mats. 321\, 2648 (2009)].\n\n//in
 dico.ictp.it/event/a10227/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10227/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "The pairing resonan
 ce: Experiments\, theory and applications"\n
DTSTART;VALUE=DATE-TIME:20101019T103000Z
DTEND;VALUE=DATE-TIME:20101019T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10272@ictp.it
DESCRIPTION:The pairing resonance is an anomaly in the tunneling density o
 f states (TDOS) of superconductors driven to the normal state\, at low tem
 peratures and high magnetic fields\, by the Zeeman effect.  I will review 
 experiments on thin films and their theoretical explanations.  The positio
 n and shape of the pairing resonance depend on the strength and direction 
 of the applied field\, and on material properties such as the spin-orbit s
 cattering rate 1/\\tau_{so} and the Fermi-liquid parameter G^0\, which acc
 ounts for the renormalization of the spin susceptibility due to interactio
 ns.  We can therefore determine \\tau_{so} and G^0 from measurements of th
 e TDOS.  As another application\, I will discuss measurements of conductio
 n electron polarization in ferromagnetic films.\n\n//indico.ictp.it/event/
 a10272/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10272/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Non-Abelian
  statistics and topological quantum computation in 1D wire networks"\n
DTSTART;VALUE=DATE-TIME:20101021T103000Z
DTEND;VALUE=DATE-TIME:20101021T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10274@ictp.it
DESCRIPTION:Topological quantum computation provides an elegant way around
  decoherence\, as one encodes quantum information in a non-local fashion t
 hat the environment finds difficult to corrupt. In this talk I will descri
 be a surprising new topological quantum computation platform: one-dimensio
 nal semiconductor wire networks.  Recent work [1] provides a recipe for dr
 iving semiconducting wires into a topological phase supporting long-sought
  particles known as Majorana fermions that can store topologically protect
 ed quantum information.  Majorana fermions in this setting can be transpor
 ted\, created\, and fused by applying locally tunable gates to the wire.  
 More importantly [2]\, networks of such wires allow Majorana fermions to b
 e meaningfully braided\, exhibiting non-Abelian statistics like vortices i
 n a p + ip superconductor.  We propose experimental setups that allow for 
 efficient exchange of arbitrary numbers of Majorana fermions.\n\n[1] Y. Or
 eg\, G. Refael\, F. von Oppen\,  Helical liquids and Majorana bound states
  in quantum wires\, arXiv:1003.1145\n\n[2] J. Alicea\, Y. Oreg\, G. Refael
 \, F. von Oppen\, M.P.A. Fisher\,  Non-Abelian statistics and topological 
 quantum computation in 1D wire networks\, arXiv:1006.4395\n\n//indico.ictp
 .it/event/a10274/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10274/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "Spin waves in quantum Hall ferromagnets: \nSpect
 ra and relaxation times"\n
DTSTART;VALUE=DATE-TIME:20101027T150000Z
DTEND;VALUE=DATE-TIME:20101027T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10278@ictp.it
DESCRIPTION:Spin waves (SW's) in a spin-polarized quantum Hall (QH) system
  are purely electronic excitations and represent spin-flip related intra-L
 andau-level collective modes where the change of total spin numbers is del
 ta S=delta S_z=-1.  These belong to the kind of lowest energy excitations 
 in a QH ferromagnet and have a of order q^2 energy dispersion  when two-di
 mensional wave vector  q  is much smaller than the inverse magnetic length
 .  In the integer QH regime (at fillings  nu=1\,3\,...) spin wave (SW) is 
 effectively a two-particle excitation\, i.e. a spin-exciton consisting of 
 an electron on the upper spin sublevel of the half-filled Landau level and
  an effective hole remaining on the lower one.  The spin-exciton spectrum 
 can be calculated in the first order approximation in terms of parameter r
 _s which is the ratio of the characteristic electron interaction energy to
  the cyclotron energy.\nSW relaxation processes in QH ferromagnets are det
 ermined by different relaxation channels. The relaxation occurs through tw
 o types of interactions: (i) by an interaction which does not conserve the
  spin number\; and (ii) by an interaction responsible for dissipation of e
 nergy\, because every SW possesses at least the Zeeman energy.  Analysis r
 eveals that there are two relevant mechanisms changing spins --- the spin-
 orbit coupling of electrons confined to a two-dimensional channel and the 
 hyperfine coupling to lattice nuclei.  There are four dissipation mechanis
 ms: (i) by effective Coulomb interaction of SW's renormalized to an effect
 ive dipole-dipole interaction and leading to the  dynamic SW-SW scattering
  channel\; (ii) by the kinematic SW-SW scattering in the case of the hyper
 fine coupling\; (iii) by the  kinematic SW-SW scattering provoked by elect
 ron-disorder interaction which is effective in the case of spin-orbit coup
 ling\; and (iv) by electron-phonon interaction leading to the dissipation 
 due to phonon emission (absorbtion).  There are thereby several relaxation
  channels responsible for diverse physics of the relaxation and for crosso
 vers between different relaxation processes depending on magnetic field\, 
 temperature\, and other parameters.  As a result\, SW relaxation times in 
 QH systems range between several nanoseconds and tens of microseconds.\nRe
 cent experiments have been carried out under conditions where the spin-orb
 it coupling and the dynamic scattering process should be predominant. The 
 measured relaxation times of order 10ns --- are in agreement with those pr
 edicted by the theory.\n\n//indico.ictp.it/event/a10278/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10278/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Quantum spi
 n glass: A journey to T=0"\n
DTSTART;VALUE=DATE-TIME:20101104T103000Z
DTEND;VALUE=DATE-TIME:20101104T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10288@ictp.it
DESCRIPTION:Shortly after the introduction of the Sherrington-Kirkpatrick 
 (SK) model for spin glasses (SG) its quantum generalisation was considered
  by Bray and Moore (1980). They established the survival of the SG phase u
 nder quantum fluctuations. Further studies refined their results for the l
 ocation of the quantum phase transition (QPT)\, as well as the behaviour o
 f the system in its vicinity. However\, the bulk of the works focused on t
 he paramagnetic phase\, the low-T region remaining a puzzle. We filled thi
 s gap by studying the transverse field SK model at T=0. Among the key prop
 erties observed/confirmed are the gapless nature of the low-T phase and th
 e presence of the specific low-energy excitations (both related to the mar
 ginal stability of the phase)\, as well as the existence of a fixed point 
 in the solution of the Parisi equations which describe the low-T solution.
 \n\nRefs:\n1. A. Bray and M. Moore\, J. Phys. C 13\, L655 (1980).\n2. J. M
 iller and D. Huse\, PRL 70\, 20 (1993) 3147.\n3. M.J. Rozenberg and D.R. G
 rempel\, PRL 81\, 12 (1998) 2550.\n4. S. Pankov\, PRL 96\, 197204 (2006).\
 n\n//indico.ictp.it/event/a10288/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10288/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Boundary-induced no
 nequilibrium phase transition into an absorbing state"
DTSTART;VALUE=DATE-TIME:20101109T103000Z
DTEND;VALUE=DATE-TIME:20101109T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10292@ictp.it
DESCRIPTION:We show that absorbing phase transitions in one dimension may 
 be induced by the dynamics of a single site.  As an example we consider a 
 one-dimensional model of diffusing particles\, where a single site at the 
 boundary evolves according to the dynamics of a contact process. We map th
 e one-dimensional model onto a zero-dimensional non-Markvian process\, dem
 onstrating that in nonequilibrium a phase transition can take place even i
 n zero dimensions.\n\n//indico.ictp.it/event/a10292/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10292/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Ginzburg La
 ndau like theory of high temperature superconductivity in the cuprates"
DTSTART;VALUE=DATE-TIME:20101111T103000Z
DTEND;VALUE=DATE-TIME:20101111T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10293@ictp.it
DESCRIPTION:I describe here a new approach to high temperature superconduc
 tivity in the cuprates.  The free energy of the system is described as a f
 unction of the (Cooper pair bond) order parameter\, in the spirit of the o
 riginal phenomenological Ginzburg Landau theory\; our functional is superf
 icially identical with its well known simple form.  We use it to compare o
 ur results successfully with a wide range of observations on cuprates as a
  function of hole doping x and temperature T.  We obtain the pseudogap cur
 ve\, the superconducting transition temperature Tc\, the superfluid densit
 y\, the specific heat (with and without a magnetic field) all in the (x\,T
 ) plane\, and the zero temperature vortex structure.  We also find\, withi
 n our picture\, the coupling of electrons to pair degrees of freedom\, and
  use this to explore the spectral function as influenced by inevitable sup
 erconducting pair fluctuations for electronic energies near the Fermi ener
 gy.  The results are confronted with recent high resolution ARPES measurem
 ents\, eg Fermi arcs above Tc\, the development of the pseudogap in the an
 tinodal region\, and the 'bending' of the gap below Tc as a function of th
 e angular location on the Fermi surface.  The work reported here was done 
 in collaboration with Sumilan Banerjee and Chandan Dasgupta of the IISc\, 
 Bangalore. If time permits\, speculations on microscopics and on quantum o
 scillations will be mentioned.\n\n//indico.ictp.it/event/a10293/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10293/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Quantum simulations
  of quantum systems"
DTSTART;VALUE=DATE-TIME:20101115T133000Z
DTEND;VALUE=DATE-TIME:20101115T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10297@ictp.it
DESCRIPTION:The detailed control of quantum systems allows for creating ar
 tificial static gauge fields.  This is an example of a new generation of e
 xperiments that allow to implement Feynman's old idea of using a quantum m
 echanics to simulate some other quantum system.\nWe shall also discuss the
  possibility of simulating the Dirac equation in artificial gravitational 
 backgrounds.\n\n//indico.ictp.it/event/a10297/
LOCATION:SISSA\, Santorio Bldg.- Room 129 (first floor)
URL://indico.ictp.it/event/a10297/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Arctic curves for 2
 D interacting dimer models"
DTSTART;VALUE=DATE-TIME:20101116T100000Z
DTEND;VALUE=DATE-TIME:20101116T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10295@ictp.it
DESCRIPTION:The Arctic Circle Theorem (Jockusch-Propp-Shor) concerns a mod
 el of domino tiling with  peculiar boundary conditions\, exhibiting phase 
 separation\,with the emergence of 'limit shapes' and 'arctic curves'. The 
 computation of such objects\, and the characterization of their fluctuatio
 ns\, has been performed for  several other models (Cohn\, Propp\, Kenyon\,
  Reshetikhin\, Okounkov\, and others)\, with deep implication in algebraic
  combinatorics and algebraic geometry. However all such models can  be vie
 wed as modelsof dimers\, i.e.  of discrete free fermions. Their most natur
 al generalization to include an interaction is provided by  the Domai-Wall
  Six-Vertex Model.\nWe here derive\, for the full phase diagram of the mod
 el\, the exact analytic expression of  the arctic curve\, and characterize
  its fluctuation\, thus extending the Arctic Circle Theorem beyond the dim
 er (free fermion) case.\n\n//indico.ictp.it/event/a10295/
LOCATION:SISSA\, Santorio Bldg.- Room 129 (first flo
URL://indico.ictp.it/event/a10295/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "X-rays\, bi
 ology and nanomachines"\n
DTSTART;VALUE=DATE-TIME:20101118T103000Z
DTEND;VALUE=DATE-TIME:20101118T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10298@ictp.it
DESCRIPTION:Only 2% of the DNA in the human genome codes for genes (protei
 n machines). It's now becoming clear that a very large part of the remaini
 ng 98%\, so called "non-coding DNA" is probably transcribed as many differ
 ent RNA molecules.  Some of these: ribozymes\, riboswitches and probably m
 ore\, are functional machines in their own right. Because of the difficult
 ies of crystallizing RNA\, 3-dimensional structural information on the str
 ucture-function relationship for these nano-machines is limited. Small ang
 le x-ray scattering (SAXS) data has proved to be a powerful resource\, alb
 eit of limited resolution\, from which to gain information about the 3D st
 ructure of intermediate states involved in the function of these RNAs. We 
 will report on our understanding of structure-function relationships of RN
 A nano-machines gained from SAXS measurements. We will also briefly mentio
 n the advent of a completely new structural technique\, Correlated X-ray S
 cattering\, based on the availability of the first hard X-ray laser\, the 
 Linear Coherent Light Source.\n\n//indico.ictp.it/event/a10298/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10298/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Quantum phases of d
 ipolar quantum gases in reduced dimensions"
DTSTART;VALUE=DATE-TIME:20101123T103000Z
DTEND;VALUE=DATE-TIME:20101123T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10301@ictp.it
DESCRIPTION:We discuss several quantum and classical phases that can be re
 alized with molecular and atomic gases with dipolar interactions.  In part
 icular\, we have in mind groundstate polar molecules and Rydberg-dressed a
 lkali atoms confined to low dimensions\, which are becoming available in e
 xperiments.  Various solids and novel supersolid phases are shown to be st
 able in these systems.\n\n//indico.ictp.it/event/a10301/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10301/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Dissipative
  effects in  a superconducting wire coupled to a diffusive metal"\n\n
DTSTART;VALUE=DATE-TIME:20101125T103000Z
DTEND;VALUE=DATE-TIME:20101125T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10305@ictp.it
DESCRIPTION:Superconducting wires with diameter smaller than the (bulk) co
 herence length are at present under intense experimental and theoretical r
 esearch.  Besides their potential uses in applications\, quantum fluctuati
 ons of the superconducting order-parameter are expected to show critical b
 ehavior at low temperatures.  While ideally isolated wires are reasonably 
 well-understood from the theoretical point of view\, the situation is less
  clear when environment-induced dissipation is taken into account.\nIn thi
 s work\, we show that a weak tunneling contact with a diffusive metallic f
 ilm reinforces superconductivity in the wire through the quenching of orde
 r-parameter fluctuations.  We obtain the critical points and phases of the
  system at T=0\, and in particular\, we predict a quantum phase transition
  towards a superconducting phase with long-range order as a function of th
 e wire's superconducting stiffness and coupling parameter to the metal.  W
 e also discuss implications for experiments.\n\n//indico.ictp.it/event/a10
 305/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10305/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Inverse problems in
  statistical physics\, and the identification of residue-contacts in prote
 ins"\n
DTSTART;VALUE=DATE-TIME:20101130T103000Z
DTEND;VALUE=DATE-TIME:20101130T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10307@ictp.it
DESCRIPTION:The structure of proteins puts constraints on the evolution of
  their sequence.  A random mutation of a residue in a protein (or an inter
 acting protein pair) may lead to conflicts with the chemical and physical 
 properties of its directly neighboring residues in the folded protein (or 
 the assembled protein complex) and decrease the stability of the protein (
 or protein complex).  As a consequence\, correlations in the amino-acid oc
 cupation of residues in contact emerge in the course of evolution.\nSeen t
 he huge increase in sequenced genomes\, I will discuss the inverse problem
 : Given large multiple-sequence alignments of evolutionarily related (homo
 logous) proteins\, can we identify residue contacts by statistical analysi
 s of amino acid frequencies? A maximum-entropy approach leads directly to 
 the inverse Potts problem\, i.e.\, to the inference of the coupling streng
 ths of a disordered Potts model from a set of given equilibrium configurat
 ions.  I will formulate several  approaches to solve this problem (Boltzma
 nn learning\, mean field\, TAP\, susceptibility propagation)\, and I will 
 show that statistical-physics based approaches lead to a huge increase in 
 prediction power compared to more traditional correlation analysis\, even 
 if unexpected differences between the various methods emerge. I will also 
 show that the identified contacts enable us to perform structural predicti
 ons of protein complexes\, and shed light on the interaction specificity i
 n bacterial signal transduction.\n\n//indico.ictp.it/event/a10307/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10307/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Triggering frictional 
 slip"
DTSTART;VALUE=DATE-TIME:20101201T130000Z
DTEND;VALUE=DATE-TIME:20101201T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10309@ictp.it
DESCRIPTION:Frictional slip is an important process underlying several nat
 ural hazard\, such as avalanches\, landslides and earthquakes. In this tal
 k I will discuss the general conditions in which frictional instabilities 
 are triggered. I will consider the  two basic scenarios of intrinsic (i.e.
  creep) and extrinsic (i.e. mechanically induced) triggering\, illustratin
 g both cases with simple friction models. \nIn the first part of the talk\
 , I will discuss frictional slip triggered by thermal fluctuations under a
  small external lateral force. In this case\, slip proceeds by the nucleat
 ion and growth of commensurate domains and the results can be understood u
 sing the classical theory of nucleation.\n\nIn the second part of the talk
 \, I will discuss the role of mechanical vibration in triggering frictiona
 l slip. I will illustrate the dynamics of repulsive particles confined bet
 ween a horizontally driven top plate and a vertically oscillating bottom p
 late. Our numerical results show a suppression of the high dissipative sti
 ck-slip regime in a well defined range of frequencies that depends on the 
 vibrating amplitude\, the normal applied load\, the system inertia and the
  damping constant.\nWe propose a theoretical explanation of the numerical 
 results and derive a phase diagram indicating the region of parameter spac
 e where friction is suppressed. \n\nFinally\, I will discuss the response 
 of the system to a vibrational pulse.\n\n//indico.ictp.it/event/a10309/
LOCATION:SISSA\, Santorio Bldg\, room 005
URL://indico.ictp.it/event/a10309/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and Strong Correlations: "Ferromagnetic Kondo 
 at nanocontacts of nearly magnetic metals?"\n
DTSTART;VALUE=DATE-TIME:20101202T103000Z
DTEND;VALUE=DATE-TIME:20101202T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10308@ictp.it
DESCRIPTION:The word "Kondo effect'' was originally coined to indicate the
  behavior of magnetic alloys\, but nowadays it is invoked\, not always pro
 perly\, Anytime a zero-bias anomaly is observed in the tunneling spectrum 
 across a nanocontact. There is by now plenty of evidence of the convention
 al fully-screened Kondo effect in tunneling across quantum dots\, single a
 toms and molecules. More recently\, evidence of the so-called underscreene
 d Kondo effect\, an unusual phenomenon in magnetic alloys\, has been also 
 found in single-molecule transistors.\n\nIn this talk\, I will consider th
 e possibility that nanocontacts could realize another phenomenon known to 
 arise in magnetic alloys: the so-called "giant moment''. Indeed\, while e.
 g. Fe diluted in Ag or Cu is known to undergo perfect Kondo screening\, wh
 en diluted in Pd or Pt it seems not only to retain its magnetic moment but
  also to induce locally in the host ``giant moments'' that eventually orde
 r ferromagnetically at low temperature. In particular\, I will briefly pre
 sent what is meant by "giant moments''\, and review theoretical explanatio
 ns of the absence of Kondo screening in these alloys\, checking their vali
 dity by a Numerical Renormalization group calculation. The ultimate goal i
 s to identify the key properties of these alloys and to use this knowledge
  to anticipate the signals of  "giant moments'' in transport across nanoco
 ntacts\n\n//indico.ictp.it/event/a10308/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10308/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR:\n" Sub-shot-noise qu
 antum metrology and squeezing inequalities with entangled identical partic
 les "\n\n
DTSTART;VALUE=DATE-TIME:20101207T100000Z
DTEND;VALUE=DATE-TIME:20101207T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10311@ictp.it
DESCRIPTION:By identifying non-local effects in systems of identical Boson
 ic qubits through correlations of their commuting observables\, we general
 ize and physically reinterpret the results concerning the use of the quant
 um Fisher information and spin squeezing in quantum metrology.  We show th
 at entanglement is not necessary to violate certain squeezing inequalities
  that hold for distinguishable qubits and that spin squeezing may not be n
 ecessary to achieve sub-shot noise accuracies in ultra-cold atom interfero
 metry.\n\n//indico.ictp.it/event/a10311/
LOCATION:SISSA\, Santorio Building\, Room 129 (1st floor)
URL://indico.ictp.it/event/a10311/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA CONDENSED MATTER SEMINAR:\n" Dissipationless dyna
 mics of randomly coupled spins at high temperatures "
DTSTART;VALUE=DATE-TIME:20101209T103000Z
DTEND;VALUE=DATE-TIME:20101209T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10312@ictp.it
DESCRIPTION:We develop a technique to compute high-frequency  asymptotics 
 of spin correlators in weakly interacting disordered spin systems.  We sho
 w that the high frequency spin correlators decreases exponentially at high
  frequencies\, <S S>  ~ exp(-omega t*) and compute the characteristic time
 \, t*\, of this dependence.\n\nIn a typical disordered system a significan
 t number of spins have a strongly coupled neighbor.  We show that this\, t
 ogether with the exponential decrease of the spin correlator at high frequ
 encies translates into a low-frequency 1/f noise in all physical quantitie
 s sensitive to the spin state of the strongly coupled pairs.  We discuss t
 he application of these results to the problem of susceptibility and flux 
 noise in superconducting circuits.\n\nWork in collaboration with Lev Ioffe
  and Alexei Kitaev.\n\n//indico.ictp.it/event/a10312/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10312/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Unusual Corrections
  to Scaling in Entanglement Entropy"
DTSTART;VALUE=DATE-TIME:20101214T100000Z
DTEND;VALUE=DATE-TIME:20101214T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10329@ictp.it
DESCRIPTION:The study of the entanglement properties of the ground-state o
 f an extended quantum system has prompted an intense research activity at 
 the crossroad of different disciplines such as statistical mechanics\, qua
 ntum information\, and quantum filed theory.  Quantifying the entanglement
  allowed an elegant and finer characterization of many extended quantum sy
 stems.\nIn this talk\, after reviewing the results for one-dimensional sys
 tems at a quantum critical point that are described by a conformal invaria
 nt field theory\, I will consider the corrections to the asymptotic behavi
 or.  I will show that leading corrections are unusual\, in the sense that 
 they depend (in a calculable way) on the entanglement measure and they ari
 se from relevant operators induced by the conical space-time singularities
  necessary to describe the reduced density matrix.\n\n//indico.ictp.it/eve
 nt/a10329/
LOCATION:SISSA\, Santorio Building\, Room 129 (1st Floor
URL://indico.ictp.it/event/a10329/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Solids\, su
 persolids\, and pairing with dipolar bosons in optical lattices"\n
DTSTART;VALUE=DATE-TIME:20101216T103000Z
DTEND;VALUE=DATE-TIME:20101216T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10330@ictp.it
DESCRIPTION:We discuss dipolar bosons trapped in single layer and multilay
 er optical lattices and study quantum phases stabilized by the long range 
 dipolar interaction.  Such systems can be realized experimentally by ultra
 cold samples of polar molecules.  We have observed solid\, supersolid and 
 pairing phases.  The latter can be stabilized in the presence of a mixture
  of atoms and polar molecules\, and in multilayered systems.  Our results 
 are based on quantum Monte Carlo simulations and are exact in a statistica
 l sense.\n\n//indico.ictp.it/event/a10330/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10330/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar: "Manipulation of charge\, spin and conformation 
  in atoms and molecules"\n
DTSTART;VALUE=DATE-TIME:20101220T100000Z
DTEND;VALUE=DATE-TIME:20101220T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10333@ictp.it
DESCRIPTION:Scanning tunneling microscope (STM) manipulation of single ato
 ms and molecules on surfaces allow construction of novel quantum structure
 s on an atom-by-atom basis and demonstration of single molecule devices on
  a one molecule at-a-time basis. STM is not only an instrument used to ‘
 see’ individual atoms by means of imaging\, but also a tool used to ‘t
 ouch’ and ‘take’ atoms and molecules or to ‘hear’ their vibratio
 n by manipulations. Therefore\, STM can be considered as the ‘eyes’\, 
 ‘hands’ and ‘ears’ of the scientists connecting our macroscopic wo
 rld to the atomic and nanoscopic world. \nIn our research projects\, we co
 mbine a variety of STM manipulation schemes with tunneling spectroscopy te
 chniques to investigate properties of atoms and molecules on surfaces. Thi
 s talk will include our recent results and achievements\; in spintronic re
 search area\, we will demonstrate that not only manipulation of magnetic a
 toms can be done but also imaging the direction of spin is possible by usi
 ng a magnetic STM tip [1]. In superconductivity area\, we will present the
  smallest molecular superconductor ever studied to date. Here\, the findin
 g of superconductivity in just four pairs of (BETS)2-GaCl4 molecules not o
 nly provides the possibility of investigating this phenomenon locally\, bu
 t also opens potential applications in nanoelectronics [2]. In molecular s
 pintronics area\, orbital Kondo effect of TBrPP-Co molecules generated by 
 an interfacial charge transfer process will be discussed [3]. Finally\, in
  molecular nanomachines area\, complex rotation mechanisms of Ru based dou
 bled decker molecular rotors operated by injecting tunneling electrons fro
 m an STM tip will be presented. These experiments are innovative\, and are
  tailored to address several critical issues covering both for fundamental
  understanding\, and for demonstration of novel atom/molecule based nanode
 vices. \n\n[1] D. Serrate\, P. Ferriani\, Y. Yoshida\, S.-W. Hla\, M. Menz
 el\, K. von Bergmann\, S. Heinze\, A. Kubetzka\, and R.\nWiesendanger. Ima
 ging and Manipulating the Spin Direction of Individual Atoms. Nature Nanot
 echnology 5 (2010) 350-354.\n[2]. K. Clark\, A. Hassanien\, S. Khan\, K.-F
 . Braun\, H. Tanaka\, and S.-W. Hla. Superconductivity in Just Four\nPairs
  of (BETS)2 GaCl4 Molecules. Nature Nanotechnology 5 (2010) 261-265.\n[3].
  U.G.E. Perera\, H. Kulik\, V. Iancu\, LGGV\, Dias da Silva\, S.E. Ulloa\,
  N. Marzari\, and S.-W. Hla. Spatially Extended Kondo States in Magnetic M
 olecules Induced by an Interfacial Charge Transfer. Phys. Rev. Lett. 105 (
 2010) 106601.\n\n//indico.ictp.it/event/a10333/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10333/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "The weakly coupled 
 Pfaffian as  a Type I quantum Hall liquid"\n
DTSTART;VALUE=DATE-TIME:20101221T103000Z
DTEND;VALUE=DATE-TIME:20101221T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a10334@ictp.it
DESCRIPTION:The Pfaffian phase of electrons in the proximity of a half-fil
 led Landau level is understood to be a p+ip superconductor of composite fe
 rmions.  We consider the properties of this paired quantum Hall phase when
  the pairing scale is small\, i.e. in the weak-coupling\, BCS\, limit\, wh
 ere the coherence length is much larger than the charge screening length. 
  We find that\, as in a Type I superconductor\, the vortices attract so th
 at\, upon varying the magnetic field from its magic value at \\nu=5/2\, th
 e system exhibits Coulomb frustrated phase separation.  We propose that th
 e weakly and strongly coupled Pfaffian states exemplify a general dichotom
 y between Type I and Type II quantum Hall fluids.\n\n//indico.ictp.it/even
 t/a10334/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a10334/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Spectra of products
  of  Gaussian random matrices"\n
DTSTART;VALUE=DATE-TIME:20110118T103000Z
DTEND;VALUE=DATE-TIME:20110118T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a115@ictp.it
DESCRIPTION:Some spectral properties of products of random matrices are di
 scussed.  In particular\, exact analytic expression related to the eigenva
 lue and singular value distributions for the product of an arbitrary numbe
 r of independent rectangular Gaussian random matrices are derived in the l
 imit of large matrix dimensions.  The eigenvalue density is obtained by me
 ans of a planar diagrammatic technique\, which will be outlined in great d
 etail throughout the talk\, while the singular value density is derived in
  the framework of Free Probability\, the extension of ordinary probability
  theory to non-commuting objects.  Both distributions are shown to display
  a power-law behavior at zero. A heuristic form for finite size correction
 s to these expressions which very well approximates the distributions for 
 matrices of finite dimensions is proposed.  All results are compared to em
 pirical spectra\, finding an excellent overall agreement between theory an
 d data.  Also\, some possible applications to information theory and to pr
 oblems of multivariate statistics are discussed.\n\n//indico.ictp.it/event
 /a115/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a115/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Quantum spin Hamilt
 onian for the SU(2) Wess-Zumino-Witten model" \n
DTSTART;VALUE=DATE-TIME:20110125T100000Z
DTEND;VALUE=DATE-TIME:20110125T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1110@ictp.it
DESCRIPTION:We show that the chiral correlators of the SU(2) level k  WZW 
 model can be used as ground states of quantum spin chains.  Employing the 
 null vectors of this Rational CFT\,  we construct the corresponding Hamilt
 onians.  At level k=1  we recover the Haldane-Shastry spin chain  which is
  generalized to study dimerized and random chains.  At level k=2 we constr
 uct a spin 1 chain whose ground state is a pfaffian\, and a spin 1/2 chain
  whose ground state is degenerate\, according to the fusion rules  of the 
 WZW.  These models are further generalized to two dimensions.  We shall al
 so briefly discuss the relation with the Fractional Quantum Hall wave func
 tions allowing for  topological quantum computation.\n\n//indico.ictp.it/e
 vent/a1110/
LOCATION:SISSA\, Santorio Bldg.\, Room 129 1st floor
URL://indico.ictp.it/event/a1110/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "A tunable Bose-Eins
 tein condensate in  disordered potentials"\n
DTSTART;VALUE=DATE-TIME:20110201T103000Z
DTEND;VALUE=DATE-TIME:20110201T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1113@ictp.it
DESCRIPTION:We present our studies on a Bose-Einstein condensate (BEC) tra
 pped in disordered potentials.  The interactions between the atoms can be 
 controlled at will thanks to a broad magnetic Feshbach resonance \n[1].  T
 he disorder is introduced into the system by means of a quasi-periodic lat
 tice generated by superimposing two laser standing waves with incommensura
 te wavelengths.  We study two different regimes.  First\, the interactions
  between the particles are tuned to zero.   This "ideal" gas in the bichro
 matic lattice reproduces the Aubry-André hamiltonian \n[2]\, which shows 
 a transition between extended and exponentially localized single-particle 
 wavefunction\, similar to the Anderson model \n[3]. We have directly obser
 ved the onset of localization by probing the momentum distribution and the
  absence of diffusion of the non-interacting condensate \n[4]. In a second
  experiment\, we reintroduce some repulsive interactions into the sample \
 n[5]. In particular\, we investigate the interplay between disorder and in
 teractions.  We observe the transition from incoherent Anderson localized 
 states to fully coherent extended states.  For large interactions the effe
 ct of the disorder is highly reduced and the system enters the BEC regime.
   The characterization of this superfluid to insulator transition (SIT) is
  particularly important. Infact\, despite it is present in many different 
 physical systems such as\, for example\, helium in porous media \n[6] and 
 high TC superconductors \n[7]\, its complete understanding is still missin
 g. We also study the diffusion of the coherent matter wave through the dis
 ordered lattice \n[8]. In case of the non interacting system\, diffusion i
 s absent\, since the condensate wavefunction is fully localized.  When rep
 ulsive interactions are added\, we instead observe a slow expansion with s
 ubdiffusive behavior. Our investigations allow to get an insight on the in
 terdisciplinary field of diffusion in disordered potentials in presence of
  non-linearity.\n\nReferences\n[1] G. Roati et al.\, Phys. Rev. Lett. 99\,
  010403 (2007)\n[2] S. Aubry and G. André\, Ann. Israel Phys. Soc. 3\, 13
 3 (1980).\n[3] P. W. Anderson\, Phys. Rev. 109\, 1492 (1958).\n[4] G. Roat
 i et al.\, Nature 453\, 895 (2008)\n[5] B. Deissler et al.\, Nature Physic
 s 6\, 354-358 (2010)\n[6] J. D. Reppy\, J. Low Temp. Phys. 87\, 205 (1992)
 .\n[7] Y. Dubi\, Y. Meir\, and Y. Avishai\, Nature 449\, 876 (2007).\n[8] 
 E. Lucioni et al.\, in preparation\n\n//indico.ictp.it/event/a1113/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1113/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "A steady st
 ate  thermodynamic entanglement witness"\n\n
DTSTART;VALUE=DATE-TIME:20110203T103000Z
DTEND;VALUE=DATE-TIME:20110203T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1115@ictp.it
DESCRIPTION:We present a method for entanglement detection in steady state
  systems using a thermodynamic witness.  To illustrate\, we consider an ex
 ample and find that for an XX spin chain\, the presence of an energy curre
 nt increases the region of entanglement detected by the steady state witne
 ss.  Further\, we find that entanglement exists even at a high steady stat
 e temperature.  We also discuss concurrence in the steady state system and
  find that the amount of entanglement can be increased by the current.\n\n
 //indico.ictp.it/event/a1115/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1115/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Discrete parafermio
 ns and critical interfaces in the Ashkin-Teller model" 
DTSTART;VALUE=DATE-TIME:20110208T100000Z
DTEND;VALUE=DATE-TIME:20110208T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1116@ictp.it
DESCRIPTION:The Ashkin-Teller (AT) model is a 2D statistical model\, consi
 sting of two coupled Ising models.  It has a critical line with constant c
 entral charge c=1 and varying critical exponents\, containing in particula
 r the Z_4 spin model of Fateev-Zamolodchikov.  We construct a discretely h
 olomorphic parafermion existing for the whole critical line\, identify the
  corresponding interface in terms of the cluster representation of the AT 
 model\, and find that this interface has a constant fractal dimension d_f=
 3/2 along the critical line.  In this talk\, I will explain this construct
 ion and discuss attempts to relate the Z_N and AT interfaces to SLE. I wil
 l also compare our results to recent works by M. Picco and R. Santachiara 
 (LPTHE/LPTMS\, Paris).\n\n- Y. Ikhlef\, M. A. Rajabpour\, J. Phys. A: Math
 . Theor. 44 (2011) 042001\n\n//indico.ictp.it/event/a1116/
LOCATION:SISSA\, Santorio Bldg.\, room 129 1st floor
URL://indico.ictp.it/event/a1116/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on on Disorder and strong electron correlations: "Quasipar
 ticles and  the topological order of the \\nu=5/2 state"\n
DTSTART;VALUE=DATE-TIME:20110210T103000Z
DTEND;VALUE=DATE-TIME:20110210T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1121@ictp.it
DESCRIPTION:We present evidence supporting the weakly paired Moore-Read ph
 ase in the half-filled second Landau level\, focusing on some of the *qual
 itative* features of its excitations.  Based on numerical studies\, we stu
 dy both skyrmions and neutral excitations.  Skyrmions are found to be pres
 ent at low enough fields\, and are promoted by disorder [1]. We show that 
 systems with odd particle number at the flux N_\\phi=2N-3 can be interpret
 ed as a neutral fermion mode of one unpaired fermion\, which is gapped. Th
 e energetics of neutral fermions interacting with pairs of quasiparticles 
 is found to be in agreement with predictions for non-abelian statistics of
  the Ising type with degenerate fusion channels 1 and \\psi [2].  In parti
 cular\, we discuss signatures of the \\nu=5/2 Hall liquid in photoluminesc
 ence (PL) experiments [3]:  The neutral fermion mode is found to have two 
 distinct minima\, resulting in a double-peak structure in the PL spectrum 
 [2].  On the other hand\, a valence hole in proximity to the 2DEG induces 
 a disorder potential that locally favours skyrmions.  Thus PL signals as a
  probe for spin polarization in the groundstate should be interpreted cons
 ervatively.\n\n[1] A. Wójs\, G. Möller\, S. H. Simon\, and N. R. Cooper\
 , Phys. Rev. Lett. 104\, 086801 (2010).\n[2] G. Möller\, A. Wójs\, N. R.
  Cooper\, arXiv:1009.4956.\n[3] Stern et al.\, Phys. Rev. Lett. 105\, 0968
 01 (2010).\n\n//indico.ictp.it/event/a1121/
LOCATION:ICTP
URL://indico.ictp.it/event/a1121/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Many-body physics w
 ith ultracold gases"
DTSTART;VALUE=DATE-TIME:20110215T103000Z
DTEND;VALUE=DATE-TIME:20110215T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1126@ictp.it
DESCRIPTION:In experiments performed with ultracold gases one can manipula
 te the main parameters of the sample.  This allows to induce various intri
 guing quantum phenomena due to strong inter-particle correlations.  In thi
 s talk we review some recent quantum Monte Carlo studies of Fermi gases wi
 th resonant inter-particle interactions.  We discuss the properties of the
  superfluid phase and of the exotic normal phase which can be stabilized a
 t zero temperature by imposing an imbalance between the spin components.  
 For bosonic systems in optical lattices\, we investigate the superfluid to
  insulator transition by using a novel continuous-space quantum Monte Carl
 o technique.  We address the regimes of strong inter-particle interactions
  and weak or intermediate optical potentials\, thus extending previous the
 oretical studies based on discrete lattice models.\n\n//indico.ictp.it/eve
 nt/a1126/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1126/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA  Colloquium on Condensed Matter Physics:\n"Quantu
 m physics in one dimension"
DTSTART;VALUE=DATE-TIME:20110216T150000Z
DTEND;VALUE=DATE-TIME:20110216T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1122@ictp.it
DESCRIPTION:The effect of interactions on quantum particles is a long stan
 ding question\, with important consequences for most realistic systems.  I
 n one dimension interactions usually lead to a radically new type of physi
 cs\, very different from the one we know for higher dimensional systems.\n
 I will present the main concepts underlying this physics\, known as Luttin
 ger liquids\, and show the various realizations of such systems that recen
 t progress in material science\, nanotechnology and cold atomic physics ha
 ve provided.  I will discuss where the field is standing now\, and what ar
 e today's challenges\, such as going beyond the Luttinger liquid concept.\
 n\n//indico.ictp.it/event/a1122/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1122/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Spin dimers
 : from BEC to Luttinger liquids"\n
DTSTART;VALUE=DATE-TIME:20110217T103000Z
DTEND;VALUE=DATE-TIME:20110217T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1129@ictp.it
DESCRIPTION:Localized spin systems\, and in particular dimer systems\, pro
 vide a fantastic laboratory to study the interplay between quantum effects
  and the interaction between excitations.  Magnetic field and temperature 
 allow an excellent control on the density of excitations and various very 
 efficient probes such as neutrons and NMR are available.  They can thus be
  used as "quantum simulators'' to tackle with great success questions that
  one would normally search in itinerant interacting quantum systems.   In 
 particular they have provided excellent realizations of Bose-Einstein cond
 ensates.  This allowed not only to probe the properties of interacting bos
 ons in a variety of dimensions but also to study in a controlled way addit
 ional effects such as disorder.  If the dimensionality is reduced they als
 o allow to test in a quantitative way Luttinger liquid physics.  I will di
 scuss these various cases\, and show that we have now good theoretical too
 ls  to make quantitative comparisons with the experiments.\n\n//indico.ict
 p.it/event/a1129/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1129/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "Through a structural phase transition in ion cha
 ins: The inhomogeneous Kibble-Zurek mechanism"
DTSTART;VALUE=DATE-TIME:20110218T103000Z
DTEND;VALUE=DATE-TIME:20110218T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1128@ictp.it
DESCRIPTION:Structural defects in ion crystals can be formed during a line
 ar quench of the transverse trapping frequency across the mechanical insta
 bility from a linear chain to the zigzag structure.  The density of defect
 s after the sweep can be conveniently described by the Kibble-Zurek mechan
 ism.  In particular\, the number of kinks in the zigzag ordering can be de
 rived from a time-dependent Ginzburg-Landau equation for the order paramet
 er\, here the zigzag transverse size\, under the assumption that the ions 
 are continuously laser cooled.  In a linear Paul trap the transition becom
 es inhomogeneous\, the charge density being larger in the center and more 
 rarefied at the edges.  During the linear quench the mechanical instabilit
 y is first crossed in the center of the chain\, and a front\, at which the
  mechanical instability is crossed during the quench\, is identified which
  propagates along the chain from the center to the edges.  If the velocity
  of this front is smaller than the sound velocity\, the dynamics becomes a
 diabatic even in the thermodynamic limit and no defect is produced.  Other
 wise\, the nucleation of kinks is reduced with respect to the case in whic
 h the charges are homogeneously distributed\, leading to a new scaling of 
 the density of kinks with the quenching rate.  The analytical predictions 
 are verified numerically by integrating the Langevin equations of motion o
 f the ions\, in presence of a time-dependent transverse confinement.  We a
 rgue that the non-equilibrium dynamics of an ion chain in a Paul trap cons
 titutes an ideal scenario to test the inhomogeneous extension of the Kibbl
 e-Zurek mechanism\, which lacks experimental evidence to date.\n\nJournal-
 refs:\nA. del Campo\, G. De Chiara\, G. Morigi\, M. B. Plenio\, A. Retzker
 \, Phys. Rev. Lett. 105\, 075701 (2010)\n\nG. De Chiara\, A. del Campo\, G
 . Morigi\, M. B. Plenio\, A. Retzker\, New J. Phys. 12\, 115003 (2010)\n\n
 //indico.ictp.it/event/a1128/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1128/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "The free energy lan
 dscape of cellular metabolism" \n
DTSTART;VALUE=DATE-TIME:20110222T100000Z
DTEND;VALUE=DATE-TIME:20110222T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1134@ictp.it
DESCRIPTION:A large part of a cell's energy budget is determined by the op
 eration of its internal biochemical machinery\, or metabolism.  Predicting
  its behaviour at genome-scale (an issue with many important practical imp
 lications) requires the computation of non-equilibrium steady states for r
 eaction fluxes that integrate basic regulatory\, stoichiometric and thermo
 dynamic constraints. The latter point is particularly delicate for a numbe
 r of reasons.  We describe the problem and some recent advances in the fie
 ld that make use of both topological and dynamical aspects to reconstruct 
 the intracellular free energy landscape\, and (hopefully) improve the pred
 ictive ability of existing schemes.\n\n//indico.ictp.it/event/a1134/
LOCATION:SISSA\, Santorio Bldg.\, Room 129 1st floor
URL://indico.ictp.it/event/a1134/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Multi-compo
 nent fractional quantum Hall effect  in graphene"\n\n
DTSTART;VALUE=DATE-TIME:20110224T103000Z
DTEND;VALUE=DATE-TIME:20110224T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1135@ictp.it
DESCRIPTION:A milestone in graphene research was the 2005 discovery of an 
 integer quantum Hall effect in this novel carbon-based two-dimensional (2D
 )  electron system. Contrary to its manifestation in conventional 2D  elec
 tron systems\, such as in semiconductor heterostructures\, the  graphene q
 uantum Hall effect reflects the "ultra-relativistic" character  of the und
 erlying carriers\, via a particular sequence of plateaus in the  transvers
 e Hall resistance.\nA natural question arises from this discovery: what ab
 out the fractional  quantum Hall effect in graphene? Does it also reflect 
 the  ultra-relativistic character of the charge carriers? To what extent i
 s  it different from the fractional quantum Hall effect in  (non-relativis
 tic) semiconductor heterostructures? Many of these  questions remain open 
 from an experimental point of view\, although some  fractional states have
  recently been observed in the two- and  four-terminal configuration.\nThi
 s talk aims at a theoretical perspective on the fractional quantum  Hall e
 ffect in graphene\, namely in view of its multi-component character  due t
 o the fourfold spin-valley degeneracy\, which is approximately respected b
 y the underlying electron-electron interactions. This theoretical perspect
 ive will be confronted with recent experimental  advances.\n\n//indico.ict
 p.it/event/a1135/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1135/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar: "On the uncertainty and positivity of Wigner fun
 ctions of one-dimensional mixed states"
DTSTART;VALUE=DATE-TIME:20110225T103000Z
DTEND;VALUE=DATE-TIME:20110225T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1138@ictp.it
DESCRIPTION:We present a new uncertainty relation for one-dimensional mixe
 d states given its purity and degree of non-Gaussianity. This relation ext
 ends the purity-bounded uncertainty re\nlation for mixed states derived by
  V. V. Dodonov and V. I. Man’ko. For the special case of pure states it 
 provides us with an extended version of the Robertson-Schrödinger uncerta
 inty relation\, saturated by a set of states which includes all the eigens
 tates of the quantum harmonic oscillator. We represent our results as a bo
 und in a three-dimensional parametric space of mixed states and identify t
 he regions of the bound realized by states with non- negative Wigner funct
 ion. This takes us closer to a proper extension of Hudson’s theorem to m
 ixed states and permits us to visualize and compare the set of states with
  non-negative Wigner function and the set of states which minimize the new
 ly derived uncertainty relation.\n\n//indico.ictp.it/event/a1138/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1138/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Diagrammatic Monte 
 Carlo for correlated fermions"\n
DTSTART;VALUE=DATE-TIME:20110301T103000Z
DTEND;VALUE=DATE-TIME:20110301T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1137@ictp.it
DESCRIPTION:One of the important goals promising a major impact on the fie
 ld of condensed matter and far beyond\, is being able to describe properti
 es of correlated fermionic systems quantitatively accurately without uncon
 trolled approximations.  In this talk\, I will focus on the family of diag
 rammatic Monte Carlo (DiagMC) methods introduced recently to meet this cha
 llenge.  The Determinant DiagMC technique allowed to obtain the most accur
 ate so far prediction of the critical temperature curve across the crossov
 er from the Bardeen-Cooper-Schrieffer pairing to the Bose-Einstein condens
 ate of molecules (the BCS-BEC crossover) in a two-component Fermi gas.  A 
 new generation of DiagMC methods based on sampling irreducible Feynman dia
 grams directly in the thermodynamic limit features an unprecedented tolera
 nce to the notorious fermionic sign problem\, which makes it a promising t
 echnique for unbiased solution of generic many-body fermionic systems.  I 
 will substantiate this promise with accurate results for the repulsive Hub
 bard model in the correlated Fermi liquid regime and a very recent calcula
 tion of the equation of state of the unitary Fermi gas.\n\n//indico.ictp.i
 t/event/a1137/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1137/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "Energy conversion and storage with nanomaterials
 : Atomistic simulations"
DTSTART;VALUE=DATE-TIME:20110303T150000Z
DTEND;VALUE=DATE-TIME:20110303T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1140@ictp.it
DESCRIPTION:The capability of materials for energy conversion and storage 
 can be considerably extended by nanostructuring.  The morphology and stabi
 lity of a nanostructure depend crucially on the environmental conditions o
 f fabrication and operation.  It is therefore fundamental for energy appli
 cations to understand in detail how the environment influences these prope
 rties.  In this talk\, I will discuss atomistic simulations based on densi
 ty functional theory aimed at investigating the formation and stability of
  nanostructures of oxides of platinum-group metals and of lithium in an ox
 ygen-rich environment.  These systems are relevant for fuel cells and lith
 ium-air batteries\, respectively.  I will show that the thermodynamics of 
 oxides is different when the nanoscopic size is taken into account and tha
 t this has consequences for their functionality.  I will thoroughly compar
 e the calculations with experimental results on oxidation state\, morpholo
 gy and functional behavior of nanostructures\, and I will discuss open que
 stions and future developments.\n\n//indico.ictp.it/event/a1140/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1140/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Integer qua
 ntum Hall edge states far from equilibrium"\n\n
DTSTART;VALUE=DATE-TIME:20110303T103000Z
DTEND;VALUE=DATE-TIME:20110303T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1143@ictp.it
DESCRIPTION:A non-equilibrium distribution of electrons is set up when two
  quantum Hall edge states originating from sources at different potentials
  meet at a quantum point contact.  Recently\, several types of experiment 
 have probed the consequences of this non-equilibrium distribution\, first 
 in interferometers\, and recently by a direct measurement of the distribut
 ion and its evolution with distance downstream from the quantum point cont
 act [1].\nIn this talk I will describe theoretical work [2] aimed at under
 standing aspects of these experiments.\n\nReferences\n\n[1] H. le Sueur\, 
 C. Altimiras\, U. Gennser\, A. Cavanna\, D. Mailly\, F. Pierre\, Phys. Rev
 . Lett. 105\, 056803 (2010).\n\n[2] D. L. Kovrizhin and J. T. Chalker\, ar
 Xiv:1009.4555\, and in preparation.\n\n//indico.ictp.it/event/a1143/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1143/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Efficient s
 imulation of quantum-many-body systems with tensor networks"\n
DTSTART;VALUE=DATE-TIME:20110304T103000Z
DTEND;VALUE=DATE-TIME:20110304T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1141@ictp.it
DESCRIPTION:In this talk I will give a brief review on the intrinsic link 
 between the numerical renormalization group (NRG) and the density matrix r
 enormalization group (DMRG) in terms of tensor networks.  With respect to 
 the NRG then\, complete yet fully tractable many-body basis sets allow for
  textbook evaluations of physical properties of quantum impurity models su
 ch as dynamic correlation functions or quantum quenches.  This\, for examp
 le\, also provides a direct link to optical absorption spectra\, and provi
 des a framework for a clean numerical treatment of Anderson orthogonality 
 exponents in the thermodynamic limit.  More generally\, challenges in nume
 rical complexity will be addressed\, highlighting a recent algorithmic adv
 ance in terms of the generic implementation of non-abelian symmetries with
 in tensor networks.\n\n//indico.ictp.it/event/a1141/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1141/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter: "Tuning lattice d
 istortion by pressure:  The insulator to metal transition and  the onset o
 f phase separated states"\n
DTSTART;VALUE=DATE-TIME:20110309T153000Z
DTEND;VALUE=DATE-TIME:20110309T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1145@ictp.it
DESCRIPTION:The experimental accessibility of high density phases in conde
 nsed matter systems\, thanks to the advances of high pressure techniques o
 ver the last years\, has switched pressure from being a less common extern
 al perturbation probe into an increasingly versatile tool in materials res
 earch.  Here\, I want to focus on some selected pressure-induced effects i
 n crystalline systems\, in particular on how the natural effect of promoti
 ng more symmetric structure upon compressing the lattice can be worked out
  into a tuning of local and extended lattice distortions arising from char
 ge-lattice coupling.  This is the exemplary case of the spontaneous symmet
 ry breaking occurring in Jahn-Teller and Peierls systems.  The physics of 
 these correlated materials is quite complex and typically characterized by
  a delicate interplay among different interactions at the same energy scal
 e.  Applying pressure\, over even a relatively small range (0-40 GPa)\, ca
 uses these systems to reach new\, and sometimes unconventional\, states bu
 t it also enables to disentangle the effects of the different coupling mec
 hanisms thus gaining a deeper knowledge of the  ambient conditions phases.
   As an example of a Jahn-Teller system I present an extended experimental
  study of La-Ca manganites (La1-xCaxMnO3) under high pressure (range 0-30 
 GPa)\, with particular attention to the parent LaMnO3 compound and the LaM
 n1-xGaxO3 family.  Recent high pressure experiments (range 0-20 GPa) on se
 veral Vanadium oxides with special focusing to the case of VO2 (Peierls sy
 stem) is also discussed.  We will see that\, apart from the characterizati
 on of the new higher density phases\, the high pressure studies provide ke
 y information on the physics of these systems at ambient pressure which st
 imulates their theoretical modeling.\n\n//indico.ictp.it/event/a1145/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1145/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Aharonov-Bo
 hm conductance through a single-channel quantum ring"\n\n
DTSTART;VALUE=DATE-TIME:20110310T103000Z
DTEND;VALUE=DATE-TIME:20110310T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1146@ictp.it
DESCRIPTION:We study the effect of electron-electron interaction on transp
 ort through a tunnel-coupled single-channel ring. We find that the conduct
 ance as a function of magnetic flux shows a series of interaction-induced 
 resonances that survive thermal averaging.  The period of the series is gi
 ven by the interaction strength alpha.  The physics behind this behavior i
 s the blocking of the tunneling current by the circular current.  The main
  mechanism of dephasing is due to circular-current fluctuations.  The deph
 asing rate is proportional to the tunneling rate and does not depend on al
 pha.\n\n//indico.ictp.it/event/a1146/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1146/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "A field theory for fermi
 onic ladder  with generic intrachain interactions"\n\n
DTSTART;VALUE=DATE-TIME:20110314T100000Z
DTEND;VALUE=DATE-TIME:20110314T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1151@ictp.it
DESCRIPTION:An effective low energy field theory is developed for a system
  of two chains.  The main novelty of the approach is that it allows to tre
 at generic intrachain repulsive interactions of arbitrary strength.   The 
 chains are coupled by a direct tunneling and four-fermion  interactions.  
 At low energies the individual chains are described as   Luttinger liquids
  with an arbitrary ratio of spin $v_s$ and charge $v_c$ velocities.  A jud
 icious choice of the basis for the decoupled chains greatly  simplifies th
 e description and allows one to separate high and low energy degrees of fr
 eedom.  In a direct analogy to the bulk cuprates the resulting effective f
 ield theory distinguishes  between three qualitatively different regimes: 
 (i) small doping ($v_c \n\n//indico.ictp.it/event/a1151/
LOCATION:SISSA\, Santorio Building\, Room 129 (1st floor)
URL://indico.ictp.it/event/a1151/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Statistical methods
  in gene regulation"
DTSTART;VALUE=DATE-TIME:20110315T103000Z
DTEND;VALUE=DATE-TIME:20110315T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1152@ictp.it
DESCRIPTION:Gene regulation is one of the most interesting open problems i
 n modern molecular biology.  In this talk I will discuss in particular a c
 lass of regulatory motifs known as "mixed feed forward loops (mFFLs)".  Th
 ese motifs seem to be under positive selection in the human regulatory net
 work\, thus suggesting that they should play some important functional rol
 e.  Moreover\, in human\, several of the genes involved in these mFFLs are
  known to be oncogenes (i.e. genes related to cancer progression).  Our pr
 oposal is that these mFFLs are used by the cell to keep under  control the
  stochastic fluctuations in the amount of proteins expressed by the target
  genes and that for this reason their disregulation plays such an importan
 t role in cancer progression.  The talk will be divided in two parts.  The
  first will be devoted to a short pedagogical introduction to the organiza
 tion of Eukaryotic genomes and to the mechanisms of gene regulation.  Then
  in the second part I will discuss\, using both stochastic equations and b
 ioinformatic tools the role played by mFFLs in the regulatory network.\n\n
 //indico.ictp.it/event/a1152/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1152/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on  Disorder and strong electron correlations: \n"Influenc
 e of thermal fluctuations on the spectral function in 2D superconductors"\
 n\n
DTSTART;VALUE=DATE-TIME:20110317T103000Z
DTEND;VALUE=DATE-TIME:20110317T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1154@ictp.it
DESCRIPTION:We study the behavior of single electron spectral function in 
 a model of 2D superconductors with strong phase fluctuations.  It is shown
  that in the limit when the gap amplitude is much smaller than the Fermi e
 nergy the problem is equivalent to the anisotropic spin-1/2 Kondo model an
 d some results can be obtained non-perturbatively.\n\n//indico.ictp.it/eve
 nt/a1154/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1154/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Unusual singular be
 haviour of the entanglement entropy in one dimension" 
DTSTART;VALUE=DATE-TIME:20110322T100000Z
DTEND;VALUE=DATE-TIME:20110322T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1156@ictp.it
DESCRIPTION:We study the bipartite entanglement entropy for one-dimensiona
 l systems.  Its qualitative behavior is quite well understood: for gapped 
 systems the entropy saturates to a finite value\, while it diverges logari
 thmically as the logarithm of the correlation length as one approaches a c
 ritical\, conformal point of phase transition.\nUsing the example of two i
 ntegrable models\, we argue that close to non-conformal points the entropy
  shows a peculiar singular behavior\, characteristic of an essential singu
 larity. At these non-conformal points the model undergoes a discontinuous 
 transition\, with a level crossing in the ground state and a quadratic exc
 itation spectrum.  We propose the entropy as an efficient tool to determin
 e the discontinuous or continuous nature of a phase transition also in mor
 e complicated models.\n\n- F. Franchini\, A. R. Its\, B.-Q. Jin\, V. E. Ko
 repin\; J. Phys. A 40:8467 (2007)\n- F. Franchini\, A. R. Its\, V. E. Kore
 pin\; J. Phys. A: Math. Theor. 41:025302 (2008)\n- F. Franchini\, E. Ercol
 essi\, S. Evangelisti\, F. Ravanini\; Phys. Rev. B 83:012402 (2011)\n\n//i
 ndico.ictp.it/event/a1156/
LOCATION:SISSA\, Santorio Bldg.\, Room 129
URL://indico.ictp.it/event/a1156/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Classical a
 nd quantum critical behaviors in  confined particle systems"\n\n
DTSTART;VALUE=DATE-TIME:20110324T103000Z
DTEND;VALUE=DATE-TIME:20110324T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1157@ictp.it
DESCRIPTION:Physical systems are generally inhomogeneneous\, while homogen
 eous systems are often an ideal limit of experimental conditions.  An impo
 rtant issue of the theory of critical phenomena is how critical behaviors 
 develop in inhomogenous systems.  Physically interesting systems are inter
 acting particles confined within a limited region of space by an external 
 potential.\nRecent experiments of Bose-Einstein condensation in diluted at
 omic vapors and of cold atoms in optical lattices are set up with a harmon
 ic trap.  They provide great opportunities to investigate the interplay be
 tween quantum and statistical behaviors in particle systems\, and\, in par
 ticular\, at the transitions between their thermodynamic and/or quantum ph
 ases.  Therefore\, a theoretical description of how criticality develops i
 n the presence of the confining enternal field is of great importance for 
 these experiments.\nI present a trap-size scaling theory for confined part
 icle systems at thermal and quantum transitions\, providing a framework to
  describe the critical behaviors of confined particle systems.  Some appli
 cations to physically interesting models are discussed.\n\n//indico.ictp.i
 t/event/a1157/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1157/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "The remanent densit
 y of  topological defects across a second order and \na Kosterlitz-Thoules
 s transition"\n
DTSTART;VALUE=DATE-TIME:20110329T103000Z
DTEND;VALUE=DATE-TIME:20110329T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1159@ictp.it
DESCRIPTION:The state of a system taken through a phase transition is plag
 ued with topological defects\, be them domain walls\, vortices\, monopoles
  or other depending on the particular case at hand.  After the quench thei
 r spatial distribution changes and\, typically\, their density decreases. 
  The mechanisms whereby this occurs depend on the microscopic dynamics.  R
 ealizations of such “phase ordering kinetics” in condensed-matter are 
 manifold including the relaxation of vortices in planar magnets or monopol
 es in magnetic spin-ice\, both thermally quenched.  The characterization o
 f the density of topological defects has also been of interest in cosmolog
 y and the standard description in this context is given by the so-called K
 ibble-Zurek mechanism.  We have critically revisited this theory in two ch
 aracteristic cases: a second order phase transition with discrete spontane
 ous broken symmetry [1] and the Berezinsky-Kosterlitz-Thouless infinite or
 der phase transition [2].  In this talk I shall explain our vision of this
  problem.\n\n[1] Kibble-Zurek mechanism and infinitely slow annealing thro
 ugh critical points\, G. Biroli\, L. F. Cugliandolo\, and A. Sicilia\, Phy
 s. Rev. E 81\, 050101 (2010).\n[2] Quench dynamics of the 2d XY model\, A.
  Jelic and L. F. Cugliandolo\, J. Stat. Mech. (2011) P02032\n\n//indico.ic
 tp.it/event/a1159/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1159/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "The anomalo
 us Curie-Weiss susceptibility of localized magnetic moments in  'relativis
 tic' conductors"\n
DTSTART;VALUE=DATE-TIME:20110331T103000Z
DTEND;VALUE=DATE-TIME:20110331T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1160@ictp.it
DESCRIPTION:Localized magnetic moments randomly scattered on the surface o
 f a two-dimensional conductor with quasi-relativistic electronic spectrum 
 are shown to exhibit a high-temperature susceptibility strongly deviating 
 from the Curie-Weiss law.\nThis effect is caused by the non-integrable sho
 rt-distance singularity of the electron-mediated RKKY exchange between the
  localized spins resulting in the failure of  the standard mean-field theo
 ry.  A modification of the mean field theory resolving this problem is pro
 posed and then applied to the experimentally interesting systems such as m
 agnetic atoms on graphene and on the surfaces of topological insulators.\n
 \n//indico.ictp.it/event/a1160/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1160/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on  Statistical Physics: "Long range random corre
 lations in individual spin glass samples"\n\n
DTSTART;VALUE=DATE-TIME:20110331T133000Z
DTEND;VALUE=DATE-TIME:20110331T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1162@ictp.it
DESCRIPTION:Various combinations of spin-spin correlations averaged over t
 he randomness in spin glasses have long been known to be long-ranged\, tha
 t is falling off like a power of the distance. This implies that correlati
 ons must be long ranged in some sense already before averaging\, that is t
 hey must be long ranged with finite probability also in individual samples
 . The motivation for the study of correlations in individual samples of th
 e paradigmatic case of spin glasses comes from the consideration that long
  range correlations seem to be a common feature of several complex systems
 \, and in some of the real life complex systems not only the averaged beha
 viour\, but also the individual samples are important. Numerical simulatio
 ns in the mean field model [1] have already showed that the distribution o
 f the simplest spin-spin correlations is very broad at low temperatures. W
 e performed similar studies on low dimensional (2d\,3d) spin glass samples
  and found broad correlation distributions again. (In 2d there is no equil
 ibrium spin glass phase\, but at low temperatures we found extremely long-
 lived quasi-stable patterns that allowed us to measure the correlations.) 
 The dependence of the correlations on distance in Euclidean lattices is ra
 ndom\, with anomalously large absolute values showing up with finite proba
 bility even for large distances. The correlations extremely sensitively de
 pend on the realization of the random couplings and on the boundary condit
 ions\, but any averaging (over the randomness\, or over some spherical reg
 ions around a reference site) washes away all this structure. The talk wil
 l conclude with some speculations concerning the possible relevance of the
 se findings to real life complex systems\, such as traffic\, electric powe
 r\, or financial networks.\nReference [1] A. Billoire\, I. Kondor\, J. Luk
 ic and E. Marinari: Large random correlations in individual mean field spi
 n glass samples\, J. Stat. Mech. P02009 (2011)\n\n//indico.ictp.it/event/a
 1162/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1162/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar:"Quantum stochastic p
 rocesses: A case study" 
DTSTART;VALUE=DATE-TIME:20110405T100000Z
DTEND;VALUE=DATE-TIME:20110405T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1163@ictp.it
DESCRIPTION:Quantum stochastic processes are tools to describe open and di
 ssipative quantum systems.  We shall discuss a simple down-to-earth model 
 of quantum stochastic process\, quantum analogue of the Brownian motion\, 
 whose definition is inspired by geometrical considerations but also by spe
 culative dissipative phenomena in the quantum Hall effect.\n\n//indico.ict
 p.it/event/a1163/
LOCATION:SISSA\, Santorio Bldg\, Room 129
URL://indico.ictp.it/event/a1163/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "The typical
  states of a disordered Richardson model and many-body localization"\n
DTSTART;VALUE=DATE-TIME:20110407T103000Z
DTEND;VALUE=DATE-TIME:20110407T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1167@ictp.it
DESCRIPTION:We present a thorough numerical study of the Richardson model 
 with quenched disorder (a fully-connected XX-model with longitudinal rando
 m fields).  We find a relation between the inverse participation ratio\, t
 he Edwards-Anderson order parameter and the average Hamming distance betwe
 en spin configurations covered by a typical eigenstate for which we conjec
 ture a remarkably simple form for the thermodynamic limit.  We find a sudd
 en onset of an exponentially large IPR on the space of spin configurations
 \, although local observables (single-spin expectation values) never achie
 ve thermalization.  We also studied the random process defined by the spre
 ad of a typical eigenstate on configuration space\, highlighting several s
 imilarities with hopping on percolated hypercube\, a process used to mimic
  the slow relaxation of spin glasses.\n\n//indico.ictp.it/event/a1167/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1167/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Functional renormal
 ization group\, a novel approach to quantum field"\n
DTSTART;VALUE=DATE-TIME:20110412T103000Z
DTEND;VALUE=DATE-TIME:20110412T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1171@ictp.it
DESCRIPTION:The derivation of an exact equation describing the renormaliza
 tion group flow of a scale dependent effective action\, know as  effective
  average action\, has opened the road to a new approach to quantum field t
 heory. Through different examples ranging from second order phase  transit
 ions to quantum field theory on curved space\, we review the  formalism an
 d some techniques developed to solve the exact renormalization group flow 
 equation.\n\n//indico.ictp.it/event/a1171/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1171/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Functional renormal
 ization group\, a novel approach to quantum field theory"\n
DTSTART;VALUE=DATE-TIME:20110412T103000Z
DTEND;VALUE=DATE-TIME:20110412T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1172@ictp.it
DESCRIPTION:The derivation of an exact equation describing the renormaliza
 tion group flow of a scale dependent effective action\, know as  effective
  average action\, has opened the road to a new approach to quantum field t
 heory. Through different examples ranging from second order phase  transit
 ions to quantum field theory on curved space\, we review the  formalism an
 d some techniques developed to solve the exact renormalization group flow 
 equation.\n\n//indico.ictp.it/event/a1172/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1172/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Enhancemen
 t of superconductivity by Anderson localization"
DTSTART;VALUE=DATE-TIME:20110414T103000Z
DTEND;VALUE=DATE-TIME:20110414T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1173@ictp.it
DESCRIPTION:The influence of disorder on the temperature of the supercondu
 cting transition (Tc) is studied within the sigma-model renormalization gr
 oup framework.  The electron-electron interaction in the particle-hole and
  Cooper channels is taken into account and assumed to be short-range.  Two
 -dimensional systems in the weak localization and antilocalization regime\
 , as well as systems near the mobility edge are considered.  We show that 
 in all these regimes Anderson localization leads to a strong enhancement o
 f Tc\, which is related to the multifractal character of wavefunctions.\n\
 n//indico.ictp.it/event/a1173/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1173/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "On the criticality 
 of inferred models" 
DTSTART;VALUE=DATE-TIME:20110419T100000Z
DTEND;VALUE=DATE-TIME:20110419T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1178@ictp.it
DESCRIPTION:Advanced inference techniques allow one to reconstruct the pat
 tern of interaction from high dimensional data sets.  We focus here on the
  statistical properties of inferred models and argue that inference proced
 ures are likely to yield models which are close to a phase transition.  On
  one side\, we show that the reparameterization invariant metrics in the s
 pace of probability distributions of these models (the Fisher Information)
  is directly related to the model's susceptibility.  As a result\, disting
 uishable models tend to accumulate close to critical points\, where the su
 sceptibility diverges in infinite systems.  On the other\, this region is 
 the one where the estimate of inferred parameters is most stable.  In orde
 r to illustrate these points\, we discuss inference of interacting point p
 rocesses with application to financial data and show that sensible choices
  of observation time-scales naturally yield models which are close to crit
 icality.\n\n//indico.ictp.it/event/a1178/
LOCATION:SISSA\, Santorio Bldg\, Room 129
URL://indico.ictp.it/event/a1178/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Bulk-bounda
 ry correspondence of topological insulators"\n
DTSTART;VALUE=DATE-TIME:20110421T103000Z
DTEND;VALUE=DATE-TIME:20110421T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1177@ictp.it
DESCRIPTION:Topological insulators are noninteracting gapful fermionic sys
 tems which have gapless boundary excitations.  They are characterized by t
 opological invariants.  The topological invariants can be written in many 
 different ways\, including in terms of the Green’s functions.  We show t
 hat the existence of the boundary states directly follows\, and can be der
 ived by simple manipulations\, from the existence of the bulk topological 
 invariant written in terms of the Green’s functions\, for all types of t
 opological insulators in all spatial dimensions.  At the same time\, the s
 ame procedure explains why topological insulators\, once the interactions 
 are turned on\, can lose their boundary states.\n\n//indico.ictp.it/event/
 a1177/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1177/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter Physics: "Quantum 
 quench in the transverse field ising chain "\n
DTSTART;VALUE=DATE-TIME:20110427T153000Z
DTEND;VALUE=DATE-TIME:20110427T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1184@ictp.it
DESCRIPTION:I consider the time evolution of observables in the transverse
  field Ising chain (TFIC) after a sudden quench of the magnetic field.  I 
 present exact analytical results for the asymptotic time and distance depe
 ndence of one- and two-point correlation functions of the order parameter.
   These results are based on two complementary approaches based on asympto
 tic evaluations of determinants and form-factor sums.  I show that the sta
 tionary value of the two-point correlation function is not thermal\, but c
 an be described by a generalized Gibbs ensemble (GGE).  The approach to th
 e stationary state can also be understood in terms of a GGE. Generalizatio
 ns to particular quenches in other integrable models are discussed.\n\n//i
 ndico.ictp.it/event/a1184/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1184/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Exciton-pol
 aritons: An ultra-light dissipative Bose gas with tunable dimensionality"\
 n
DTSTART;VALUE=DATE-TIME:20110428T140000Z
DTEND;VALUE=DATE-TIME:20110428T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1186@ictp.it
DESCRIPTION:Exciton-polaritons result from strong dipolar interaction betw
 een excitons in a semiconductor material and the electromagnetic field con
 fined in the same volume by a photonic nanostructure. A polariton gas is a
  model system of a dissipative\, ultra-light Bose gas in a solid state env
 ironment\, which provides an easy and complete experimental access to the 
 system observables. Thus\, fascinating phenomena like polariton lasing [1]
 \, Bose-Einstein condensation [2] and more recently superfluidity [3] coul
 d be demonstrated and studied with a great wealth of details. Recently\, o
 wing to advances in the domain of semiconductor nanostructure fabrication\
 , new interesting perspectives have emerged: the experimental realization 
 and study of a new state of Bose gases will soon be possible\, like low di
 mensional Bose gases (1D quasi-condensate [4]\, Tonks-Girardeau liquids [5
 ])\, as well as room temperature quantum degeneracy. In this presentation\
 , the most recent experimental observations on polariton gases will be rev
 iewed\, and the future possible experimental realization with polariton co
 ndensates will be discussed.\n\n[1] L. S. Dang et al.\, Phys. Rev. Lett.\,
  81\, 3920 (1998) \n[2] J. Kasprzak et al.\, Nature 443\, 409 (2006) \n[3]
  A. Amo et al.\, Nat Phys\, 5\, 805 (2009) \n[4] S. Richard et al.\, Phys.
  Rev. Lett.\, 91\, 010405 (2003) \n[5] Kinoshita et al.\, Science\, 305\, 
 1125 (2004)\n\n//indico.ictp.it/event/a1186/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a1186/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR "Transport in pure an
 d disordered spin chains"
DTSTART;VALUE=DATE-TIME:20110503T103000Z
DTEND;VALUE=DATE-TIME:20110503T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1190@ictp.it
DESCRIPTION:Spin chains represent interesting quantum many-body systems\, 
 well realized in several novel materials. Theoretical understanding of tra
 nsport in clean and disordered spin chains will be reviewed in the talk. T
 >0 spin stiffness will be discussed in connection with the integrability o
 f the model. In particular\, the interplay of electron correlations and ra
 ndom static disorder will be analysed with respect to possible many-body A
 nderson localization. It will be shown that a single static impurity as we
 ll as coupled impurity spins at T>0 lead to the incoherent transport with 
 a well defined current relaxation rate\, allowing also for either cutting 
 or healing effect\n\n//indico.ictp.it/event/a1190/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1190/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA COLLOQUIUM ON CONDENSED MATTER PHYSICS "The searc
 h for Majorana fermions in topological superconductors"\n
DTSTART;VALUE=DATE-TIME:20110505T103000Z
DTEND;VALUE=DATE-TIME:20110505T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1191@ictp.it
DESCRIPTION:Majorana fermions (particles which are their own antiparticle)
  may or may not exist in Nature as fundamental building blocks\, but in th
 e solid state they can be constructed out of electron and hole excitations
 . What is needed is a superconductor to hide the charge difference\, and a
  topological phase to eliminate the zero-point motion that would cause an 
 energy difference. A qubit encoded in a pair of Majorana fermions is expec
 ted to have an unusually long decoherence time. We will discuss strategies
  to detect Majorana fermions in a topological superconductor\, as well as 
 possible applications in a quantum computer.\n\n//indico.ictp.it/event/a11
 91/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1191/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CONDENSED MATTER SEMINAR "First-principles simulations of chalcoge
 nide phase-change materials"\n\n\n\n\n
DTSTART;VALUE=DATE-TIME:20110506T100000Z
DTEND;VALUE=DATE-TIME:20110506T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1193@ictp.it
DESCRIPTION:Phase-change materials based on chalcogenide alloys are used i
 n rewritable optical media and are promising materials for non-volatile el
 ectronic memories. Both types of devices are based on a) the ability of ph
 ase-change materials to undergo reversible and fast transitions between th
 e amorphous and crystalline phases upon heating by a laser or current puls
 e and b) the strong optical and electronic contrast between the two phases
 . In spite of their enormous technological importance\, the structural and
  electronic properties of these materials and the mechanisms driving the t
 ransitions are still controversial. In the first part of my talk I will pr
 esent our computational study of the Raman spectrum of two prototypical ph
 ase-change materials: GeTe and Ge2Sb2Te5. The spectrum of amorphous GeTe a
 nd cubic and amorphous Ge2Sb2Te5 were obtained by ab initio simulations an
 d empirical bond polarizability models. The models of the amorphous phases
  of these systems were generated by quenching from the melt within ab init
 io molecular dynamics. The calculated spectra are in good agreement with e
 xperimental data and provide strong evidence of the existence of the pecul
 iar local structures of the amorphous phase revealed by recent first-princ
 iples simulations\, namely tetrahedral Ge and defective octahedral sites f
 or a fraction of Ge and for all Sb and Te atoms. In the second part of my 
 talk I will present some preliminary results on two ongoing projects: a) t
 he study of the crystallization kinetics in GeTe by ab initio molecular dy
 namics combined with the metadynamics method and b) the investigation of t
 he structural and magnetic properties of Ge2Sb2Te5 doped with magnetic imp
 urities.\n.\n\n//indico.ictp.it/event/a1193/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1193/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Analogue Gravity in
  Bose--Einstein Condensates"\n\n
DTSTART;VALUE=DATE-TIME:20110510T100000Z
DTEND;VALUE=DATE-TIME:20110510T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1197@ictp.it
DESCRIPTION:Under certain conditions\, the propagation of phonons in conde
 nsed matter systems and the propagation of light in general relativity are
  described by the same equation. However\, while quantum phenomena like th
 e emission of thermal radiation from black holes are hardly detectable\, a
 nalogue systems can provide the unique possibility to experimentally test 
 such effects. Originally driven by such motivation\, the study of analogie
 s between quantum field theory in curved space and condensed matter has no
 w produced a fruitful interchange leading to new and deep insights in both
  fields. \n\nIn particular Bose-Einstein Condesates are a very rich and po
 werful system in which this analogy can be implemented. I will give an ove
 rview on how  various issues in the context of general relativity can be a
 ddressed through the analogy with BEC.  Vice versa\, techniques imported f
 rom general relativity can proficiently describe interesting phenomena in 
 BEC\, such as spontaneous phonon emission in flows crossing the speed of s
 ound and resonant effects in system with multiple sonic points.\n\n//indic
 o.ictp.it/event/a1197/
LOCATION:SISSA\, Room 129 1st Floor\, Santorio Building
URL://indico.ictp.it/event/a1197/
END:VEVENT
BEGIN:VEVENT
SUMMARY:JOINT ICTP/SISSA COLLOQUIUM ON CONDENSED MATTER PHYSICS: "Explorin
 g the universe of protein structures beyond the Protein Data Bank"\n\n\n
DTSTART;VALUE=DATE-TIME:20110511T153000Z
DTEND;VALUE=DATE-TIME:20110511T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1195@ictp.it
DESCRIPTION:It is currently believed that the atlas of existing protein st
 ructures is faithfully represented in the Protein Data Bank. However\, whe
 ther this atlas covers the full universe of all possible protein structure
 s is still a highly debated issue.\n\nBy using a sophisticated numerical a
 pproach\, bias exchange metadynamics\, we performed an exhaustive explorat
 ion of the conformational space of a 60 amino acid polypeptide chain descr
 ibed with an accurate all-atom interaction potential. We generated a datab
 ase of around 30\,000 compact folds with at least 30 % of secondary struct
 ure and corresponding to local minima of the potential energy.\n\nThis ens
 emble plausibly represents the universe of protein folds of similar length
 \; indeed\, all the known folds are represented in the set with good accur
 acy\, despite of the fact the simulation is performed for a homopeptide. H
 owever\, we discover that the known folds form a rather small subset\, whi
 ch cannot be reproduced by choosing random structures in the database. Rat
 her\, natural and possible folds differ by the contact order\, on average 
 significantly smaller in the former. This suggests the presence of an evol
 utionary bias\, possibly related to kinetic accessibility\, towards struct
 ures with shorter loops between contacting residues.\n\n//indico.ictp.it/e
 vent/a1195/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1195/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR  on  Disorder and Strong Correlations: "Interaction effect
 s in Dirac systems: driving chiral symmetry breaking?"
DTSTART;VALUE=DATE-TIME:20110512T103000Z
DTEND;VALUE=DATE-TIME:20110512T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1196@ictp.it
DESCRIPTION:We discuss interaction effects in Dirac materials. In a first 
 part I will discuss the role of interaction in graphene and manifestations
  of interactions in transport measurements in weakly interacting systems. 
 For strong interactions for a concrete phenomenological model we will also
  discuss the quantum critical conductivity of graphene at a semimetal-to-i
 nsulator transition (breaking the chiral symmetry) and make connection to 
 experiments conducted on suspended graphene samples. In a second part we d
 iscuss topological insulators and specifically the Dirac character of surf
 ace states. We argue that upon driving a bulk quantum phase transition sur
 face states can be tuned in a way which might facilitate the observation o
 f chiral symmetry breaking on the surface.\n\n//indico.ictp.it/event/a1196
 /
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1196/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SEMINAR  on  Disorder and Strong Correlations: "Measurement backac
 tion on adiabatic coherent electron transport"
DTSTART;VALUE=DATE-TIME:20110519T103000Z
DTEND;VALUE=DATE-TIME:20110519T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11105@ictp.it
DESCRIPTION:CTAP (coherent transport by adiabatic passage) is the spatial 
 analogue of STIRAP (stimulated Raman adiabatic passage). Its realization i
 n nanostructures has potential applications for quantum information proces
 sing. In this talk I discuss the backaction of measurement on electrons un
 dergoing CTAP in a triple quantum dot system. Continuous measurement is ac
 counted for using Korotkov's Bayesian quantum mechanics\, which allows to 
 study single realizations of the protocol while keeping track of the detec
 tor output. One observes a trade off between information gain by the measu
 rement vs. the fidelity of the protocol.\n\n//indico.ictp.it/event/a11105/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11105/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Periodic boundary condit
 ion for a  quantum integrable system with  non-cubical configuration space
 "\n
DTSTART;VALUE=DATE-TIME:20110617T103000Z
DTEND;VALUE=DATE-TIME:20110617T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11120@ictp.it
DESCRIPTION:Configuration spaces of some quantum integrable systems with s
 ingular interactions can be determined by analysing the nature of such sin
 gularity.  In this talk\, we discuss how the interactions of spin Sutherla
 nd model associated with the D_N type of root system lead to a Weyl-invari
 ant configuration space\, which is a N-dimensional generalization of the r
 hombic dodecahedron.  Imposing periodic boundary condition on this nontriv
 ial configuration space\, we derive the spectrum of spin Sutherland model 
 of D_N type.  Applying the freezing trick\, subsequently we obtain an exac
 t expression for the partition function of the related Haldane-Shastry typ
 e spin chain.\n\nReferences: BBM\, Artemio González-López and Federico F
 inkel\, Nucl. Phys. B 843 (2011) 505 and Nucl. Phys. B 812 (2009) 402.\n\n
 //indico.ictp.it/event/a11120/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11120/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Chemical Physics: "Classical and quantum simul
 ations in  earth\, energy and environment systems"\n
DTSTART;VALUE=DATE-TIME:20110620T100000Z
DTEND;VALUE=DATE-TIME:20110620T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11122@ictp.it
DESCRIPTION:Recently\, we have applied the computational condensed matter 
 physics in liquid-liquid interface\, liquid-solid interface and the three 
 phase systems\, which we know little in comparison with the bulk condensed
  matter materials & their surfaces\, and are important for earth\, energy 
 and environment systems. Of particular\, I’ll present three topics\, whi
 ch are relevant to sedimentary Methane Hydrate (MH)\, CO2 Storage and Sequ
 estration (CCS) and Enhanced Oil Recovery (EOR)\, respectively.\n(1) We ha
 ve performed molecular dynamics simulations in order to investigate the st
 ability of CH4- and CO2- hydrate. It was found that the cage occupancy of 
 hydrates influences the stability of the hydrates. More importantly\, the 
 actual three phase coexistence line of CO2 hydrate may be higher than the 
 value ever measured. Our results show that the “lowered” three phase c
 oexistence line stemmed from the partial occupancy occurred during the lab
  measurements.\n(2) We have investigated the contact angle of CO2/water/si
 lica for two different silica surfaces by using large scale molecular dyna
 mics simulations. It was found that the contact angle increases with press
 ure for hydrophobic (siloxane) surface while almost constant for the hydro
 philic (silanol) surface\, which is in excellent agreement with experiment
 al observations. The difference results from the different interactions be
 tween the CO2 thin film and silica surfaces.\n(3) By using first-principle
  molecular dynamics\, we have studied the interface of new cleaved quartz 
 (0001) surface against liquid water at room temperature. It was found that
  the quartz surface is not saturated as ideal geminal [Si-(OH)2] surface f
 or all calculations. The rest Si-O* radicals\, presumably negatively charg
 ed\, may help us solve a long-existing mystery in colloid and interface sc
 iences\, that the silica surface is negatively charged at PH=7.\n\nIn coll
 aboration with Yohei Mikami\, Shinya Tsuji\, Mia Ledyastuti\, Makoto Kunie
 da and Toshifumi Matsuoka.\n\n//indico.ictp.it/event/a11122/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11122/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA  Colloquium on Condensed Matter Physics:\n"Common
 ality and novelty of unconventional superconductors: \nCuO\, FeAs\, C60\, 
 organic and heavy-fermion systems"\n
DTSTART;VALUE=DATE-TIME:20110622T150000Z
DTEND;VALUE=DATE-TIME:20110622T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11121@ictp.it
DESCRIPTION:The year 2011 marks the 100th year anniversary of the discover
 y of superconductivity by Kammerlingh Onnes. Since then\, superconductivit
 y of simple metals\, such as Al\, Sn\, and Hg\, was explained by the BCS t
 heory more than 50 years ago. The BCS theory has several key features: (a)
  pairing mediated by phonons\; (b) energy scale of condensing charges\, i.
 e.\, Fermi energy E_F\, being much larger than that of mediating fluctuati
 ons hw_B (phonon frequency)\; (c) the transition temperature Tc scales wit
 h hw_B without directly depending on the carrier density.\nDuring recent 3
 0 years\, several new superconductors have been discovered: they include h
 igh- Tc cuprates\, organic BEDT\, alkali-doped A3C60\, heavy-fermion\, and
  FeAs superconductors which were discovered about three years ago. These s
 ystems are much different from BCS superconductors in: (a) pairing seems t
 o be mediated by the spin fluctuations rather than lattice vibrations\; (b
 ) effective energy scales of superconducting charges are comparable with e
 nergy scales of spin fluctuations\, indicating non-retarded interaction\; 
 and (c) the transition temperature scales with the superfluid density n_s/
 m*  which represents the charge energy\, suggesting relevance of Bose-Eins
 tein condensation of pre-formed pairs.\nIn this talk\, I will demonstrate 
 striking commonalities of these new unconventional superconductors by show
 ing accumulated experimental results on energy scales and phase diagrams f
 rom muon spin relaxation (MuSR)\, neutron scattering\, specific heat\, and
  other measurements\, and discuss their implications on pairing and conden
 sation mechanisms. Especially\, I will elucidate important roles of collec
 tive soft modes relevant to competing states in determining Tc\, and advan
 tage of possible resonance of the two key energy scales\, E_F\, for charge
 s and hw_B for spins\, in the process of crossover from Bose Einstein to B
 CS condensation for the pairing mediated by spin fluctuations.\nReferences
 :\nY.J. Uemura\, Nature Materials 8 (2009) 253-255. \nY.J. Uemura\, Physic
 a B404 (2009) 3195-3201.\n\n//indico.ictp.it/event/a11121/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11121/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on statistical physics: "Symmetry and the dynamic
 s and evolution of Boolean networks"
DTSTART;VALUE=DATE-TIME:20110628T103000Z
DTEND;VALUE=DATE-TIME:20110628T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11125@ictp.it
DESCRIPTION:The concept of symmetry has played a fundamental role in many 
 of the advances of theoretical physics over the last century. In the physi
 cs of complex networks\, symmetry also plays an important role. This talk 
 will explore one way that symmetry can be used in Network Science. It will
  consider Boolean networks\, which are simple models of genetic regulatory
  systems\, as well as of a variety of physical\, social\, and economic sys
 tems. They consist of a directed graph with nodes that have binary output 
 states that are heterogeneous functions of the binary input they receive. 
 Each node receives input only from the nodes connected to it by the in‐l
 inks of the graph. In general there is a symmetry associated with the dyna
 mics Boolean networks\, and different dynamics are characterized by differ
 ent symmetries. Furthermore\, if the networks are evolving then they refle
 ct the symmetry of their evolutionary dynamics. Computer simulations\, ana
 lytic statistical mechanics\, and group theoretic methods will be used to 
 identify the symmetry and to use the results to distinguish various networ
 k dynamics. Important symmetry groups will be identified. These groups inc
 lude the canalization preserving group. Canalization is a form of network 
 robustness that is important for developmental biological systems.\nRecent
  advances in direct construction methods for sampling graphs with arbitrar
 y given degree sequence and the discovery of graphicality transitions in s
 cale‐free networks will also be discussed.\n\n//indico.ictp.it/event/a11
 125/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11125/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar: "Kondo transport in nanocontact systems under bi
 as"
DTSTART;VALUE=DATE-TIME:20110628T150000Z
DTEND;VALUE=DATE-TIME:20110628T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11128@ictp.it
DESCRIPTION:Kondo transport in a two-electrode mesoscopic system under bia
 s has unique properties because of two electron reservoirs and applied bia
 s.  The former yields two tunneling levels in addition to the Kondo peak a
 t the Fermi level and the latter causes quasiparticle resonant tunneling w
 hen the chemical potential of one reservoir reaches the tunneling level.  
 Various lineshapes of nonlinear conductance observed in a quantum point co
 ntact\, scanning tunneling microscopy on a magnetic atom adsorbed on a met
 allic substrate\, and a single-electron transistor with a quantum dot\, wh
 ich are not fully understood yet\, can be explained by the quasiparticle t
 unneling through the abovementioned tunneling levels.  I present novel Gre
 en's function technique to obtain the spectral function for a given bias.\
 n\n//indico.ictp.it/event/a11128/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a11128/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on  Statistical Physics: "Entropy of network ense
 mbles"\n
DTSTART;VALUE=DATE-TIME:20110706T100000Z
DTEND;VALUE=DATE-TIME:20110706T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11135@ictp.it
DESCRIPTION:The quantification of the complexity of networks is\, today\, 
 a fundamental problem in the physics of complex systems.  A possible roadm
 ap to solve the problem is via extending key concepts of information theor
 y to networks.  In this talk we discuss recent works defining the Shannon 
 entropy of a network ensemble and evaluating how it relates to the Gibbs a
 nd von Neumann entropies of network ensembles.  The quantities we introduc
 e here  play a crucial role for the formulation of null models of networks
  through maximum-entropy arguments and  contribute to inference problems e
 merging in the field of complex networks.\n\n//indico.ictp.it/event/a11135
 /
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a11135/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on  Statistical Physics: "DNA knotting inside vir
 al capsids: A computational approach"\n
DTSTART;VALUE=DATE-TIME:20110713T153000Z
DTEND;VALUE=DATE-TIME:20110713T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11140@ictp.it
DESCRIPTION:The packing of DNA inside bacteriophages arguably yields the s
 implest example of genome organisation in living organisms [1\, 2]. An ind
 irect indication of how DNA is packaged is provided by the detected spectr
 um of knots formed by DNA that is circularised inside the P4 viral capsid 
 [3\, 4].\nThe experimental results on the knot spectrum of the P4 DNA are 
 here compared to results of coarse-grained simulation of DNA knotting in c
 onfined volumes. We start by considering a standard coarse-grained model f
 or DNA which is known to be capable of reproducing the salient physical as
 pects of free\, unconstrained DNA [5]. Specifically the model accounts for
  DNA bending rigidity and excluded volume interactions. By subjecting the 
 model DNA molecules to spatial confinement it is found that confinement fa
 vours chiral knots over achiral ones\, in agreement with  P4 experiments. 
 However\, no significant bias of torus over twist knots is found\, contrar
 y to what found in P4 experiments [6\, 7]. A good agreement with experimen
 t is found\, instead\, upon introducing an additional interaction potentia
 l that accounts for tendency of contacting DNA portions to order as in cho
 lesteric liquid crystals.\nAccounting for this local potential allows us t
 o reproduce the main experimental data on DNA organisation in phages\, inc
 luding the cryo-EM observations and detailed features of the spectrum of D
 NA knots formed inside viral capsids. The DNA knots we observe are strongl
 y delocalized and\, intriguingly\, this is shown not to interfere with gen
 ome ejection out of the phage [8].\n\nIf time allows I will report on rece
 nt characterizations of evolutionary aspects that have arguably lead to th
 e appearance of knots in naturally-occurring proteins[9].\n\nReferences\n[
 1] Earnshaw WC\, Harrison SC (1977) DNA arrangement in isometric phage hea
 ds. Nature 268:598-602.\n[2] Gelbart WM\, Knobler CM (2009) Virology. pres
 surized viruses. Science 323:1682-1683.\n[3] Arsuaga J\, Vazquez M\, Trigu
 eros S\, Sumners D\, Roca J (2002) Proc Natl Acad Sci U S A 99:5373-5377.\
 n[4] Arsuaga\, J et al. (2005) Proc Natl Acad Sci U S A 102:9165-9169.\n[5
 ] Rybenkov VV\, Cozzarelli NR\, Vologodskii AV (1993) Proc Natl Acad Sci U
  S A 90:5307-5311.\n[6] Micheletti C\, Marenduzzo D\, Orlandini E\, Sumner
 s DW (2006) J Chem Phys 124:64903-64903.\n[7] Micheletti C\, Marenduzzo D\
 , Orlandini E\, Sumners DW (2008) Biophys J 95:3591-3599.\n[8] Marenduzzo 
 D\, Orlandini E\, Stasiak A\, Sumners DW\, Tubiana L\, Micheletti C (2009)
  Proc Natl Acad Sci U S A 106:22269-22274. \n[9] Potestio\, R\, Micheletti
  C. and Orl\n\n//indico.ictp.it/event/a11140/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11140/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Accelerated sampling of 
 the  conformational space in biomolecules:  From small proteins to RNAs"\n
DTSTART;VALUE=DATE-TIME:20110715T150000Z
DTEND;VALUE=DATE-TIME:20110715T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11143@ictp.it
DESCRIPTION:Recently developed free-energy methods (steered molecular dyna
 mics\, well-tempered metadynamics\, parallel tempering and solute temperin
 g) will be discussed\, and their application to the folding of small prote
 ins and RNA molecules will be shown.  Using these techniques\, a proposed 
 model for RNA unwinding is validated and interpreted at atomistic resoluti
 on.\n\n//indico.ictp.it/event/a11143/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11143/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics:"Information transmission 
 in small gene regulatory networks"\n
DTSTART;VALUE=DATE-TIME:20110718T153000Z
DTEND;VALUE=DATE-TIME:20110718T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11144@ictp.it
DESCRIPTION:Many of the biological networks inside cells can be thought of
  as transmitting information from the inputs (e.g.\, the concentrations of
  transcription factors or other signaling molecules) to their outputs (e.g
 .\, the expression levels of various genes). On the molecular level\, the 
 relatively small concentrations of the relevant molecules and the intrinsi
 c randomness of chemical reactions provide sources of noise that set physi
 cal limits on this information transmission. Given these limits\, not all 
 networks perform equally well\, and maximizing information transmission pr
 ovides a optimization principle from which we might hope to derive the pro
 perties of real regulatory networks. Inspired by the precision of transmis
 sion of positional information in the early development of the fly embryo\
 , I will discuss the properties of specific small networks that can transm
 it the maximum information. Concretely\, I will show how the form of molec
 ular noise drives predictions not just of the qualitative network topology
  but also the quantitative parameters for the input/output relations at th
 e nodes of the network. I will show how the molecular details of regulatio
 n change the networks ability to transmit information.\n\n//indico.ictp.it
 /event/a11144/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11144/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "The other side of genome
 s: When non-coding is functional and coding is not"\n
DTSTART;VALUE=DATE-TIME:20110719T103000Z
DTEND;VALUE=DATE-TIME:20110719T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11145@ictp.it
DESCRIPTION:We have recently developed a powerful algorithm to predict pro
 tein-RNA associations that we validate using a series of assays including 
 immunoprecipitation of protein-RNA complexes.  At the same time\, we work 
 on the prediction of interactomes of amyloid fibrils in the cellular conte
 xt and develop models for calculating the interaction  potential with mole
 cular chaperones.  A series of bioinformatics tools to predict toxicity un
 der a variety of experimental conditions will be presented.\n\n//indico.ic
 tp.it/event/a11145/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11145/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "How cells can improve th
 eir sensitivity to concentration changes"
DTSTART;VALUE=DATE-TIME:20110720T153000Z
DTEND;VALUE=DATE-TIME:20110720T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11146@ictp.it
DESCRIPTION:Molecule concentrations are the building blocks of information
  transmission in living organisms.  Thanks to their molecule receptors\, c
 ells are able to sense concentration gradients with high accuracy.  For ex
 ample\, small motile bacteria such as E. coli detect spatial gradients ind
 irectly by measuring concentration ramps (temporal concentration changes) 
 as they swim\, and can respond to concentrations as low as 3.2 nM - about 
 three molecules per cell volume.  The noise arising from the small number 
 of detected molecules sets a fundamental physical limit on the accuracy of
  concentration sensing\, as originally shown in the seminal work of Berg a
 nd Purcell\, but up to now no theory existed for the physical limit of ram
 p sensing\, which is what bacteria actually do.  I will show how such a bo
 und can be derived for different measurement devices\, from a single recep
 tor to an entire cell. I will then present a plausible implementation of t
 hat bound by a realistic (bio)chemical network\, similar to the adaptation
  system of E. coli.  Finally I will show how energy consumption at the lev
 el of the receptors can be used to increase the accuracy by a twofold fact
 or over a passive scheme where no energy is consumed.\n\n//indico.ictp.it/
 event/a11146/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11146/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar:  "Correlated tunneling 
 in hydrogen bonds"
DTSTART;VALUE=DATE-TIME:20110726T140000Z
DTEND;VALUE=DATE-TIME:20110726T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11222@ictp.it
DESCRIPTION:The momentum distribution of the protons participating in hydr
 ogen bonds in water and ice deviates considerably from the classical equil
 ibrium distribution. As a consequence the molecular structure of water and
  ice is directly affected by quantum mechanics. Yet the effect is essentia
 lly quasi-harmonic and quasi-classical in nature. New physics occurs in pr
 esence of proton tunneling\, which is collective and dominated by strong l
 ocal correlations. These effects will be discussed with special reference 
 to the transition from ice VIII to ice VII\, which is driven by quantum fl
 uctuations under appropriate temperature an d pressure conditions.\n\n//in
 dico.ictp.it/event/a11222/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a11222/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Searching for needles in
  haystacks (Thinking about fast evolutionary processes through nextgen seq
 uencing of tumors)"\n
DTSTART;VALUE=DATE-TIME:20110726T103000Z
DTEND;VALUE=DATE-TIME:20110726T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11223@ictp.it
DESCRIPTION://indico.ictp.it/event/a11223/
LOCATION:ICTP Leonardo da Vinci Building Seminar Room
URL://indico.ictp.it/event/a11223/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar: "Y-junction of quantum wires: Fixed points struc
 ture and conductances"\n
DTSTART;VALUE=DATE-TIME:20110802T103000Z
DTEND;VALUE=DATE-TIME:20110802T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11225@ictp.it
DESCRIPTION:The transport properties of three Luttinger liquid wires (with
  possibly different interaction strength)\, connected through a Y-junction
 \, are studied within the scattering state formalism.  The case of a symme
 tric set-up without magnetic flux is considered first\, for which the scat
 tering matrix and the matrix of conductances is parametrized by two variab
 les.  For these we derive coupled RG equations\, with one-loop contributio
 ns summed to infinite order of bulk interaction. The Y-junction pierced by
  magnetic flux is similarly described by three coupled RG equations. The f
 ixed point structure and and the implicit solution of these equations is p
 resented. For sufficiently strong attractive interaction new fixed points 
 are found.\n\n//indico.ictp.it/event/a11225/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11225/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "From systems biology to 
 synthetic ecology"\n
DTSTART;VALUE=DATE-TIME:20110816T103000Z
DTEND;VALUE=DATE-TIME:20110816T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11230@ictp.it
DESCRIPTION:Cellular metabolism consists of a complex network of chemical 
 reactions\, which provide the cell with a reliable supply of energy and bu
 ilding blocks.  Optimization approaches based on steady state approximatio
 ns have been increasingly successful at predicting how individual microbia
 l species allocate available resources under different environments and pe
 rturbations.  Possible extensions of current approaches that incorporate i
 nteractions between different species can help understand natural microbia
 l ecosystems and engineer artificial ones\, with applications ranging from
  metabolic engineering to the human microbiome.\n\n//indico.ictp.it/event/
 a11230/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11230/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: " Fermi distribution of Fermi-surf "
DTSTART;VALUE=DATE-TIME:20110912T103000Z
DTEND;VALUE=DATE-TIME:20110912T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11248@ictp.it
DESCRIPTION:When a classical device suddenly perturbs a degenerate Fermi g
 as a coherent Fermi state arises. Coherent Fermi states involve an infinit
 e superposition of particles and holes arranged in such a manner that ther
 e are no holes in the Fermi sea but the Fermi level depends on time and sp
 ace - a Fermi-surf.\nFermi distribution and other features  of a Fermi-sur
 f has a universal nature.  It is described by Airy functions regardless of
  details of a perturbation.\n\n//indico.ictp.it/event/a11248/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11248/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Universal s
 tatistics for directed polymers and the KPZ equation from the replica Beth
 e Ansatz"\n
DTSTART;VALUE=DATE-TIME:20110915T103000Z
DTEND;VALUE=DATE-TIME:20110915T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11251@ictp.it
DESCRIPTION:I will first review the problem of the directed polymer (DP) i
 n a random potential and of the Kardar Parisi Zhang (KPZ) growth equation\
 , and their mutual relation.  I will introduce the replica Bethe Ansatz me
 thod and how it has allowed us to obtain the distribution of the free ener
 gy of the DP and of the height field of the KPZ equation.  For large polym
 er size (large KPZ time) this distribution converges to the Tracy Widom di
 stribution of the largest eigenvalue of a gaussian random matrix.  I will 
 discuss our results for both fixed and free endpoints corresponding to gro
 wth from a droplet or from an initially flat interface.\n\n//indico.ictp.i
 t/event/a11251/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11251/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Scattering properties of
  ground states in the  3-d random-field Ising model"\n
DTSTART;VALUE=DATE-TIME:20111007T093000Z
DTEND;VALUE=DATE-TIME:20111007T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11263@ictp.it
DESCRIPTION:We study the ground-state (T = 0) morphologies in the d = 3 ra
 ndom-field Ising model (RFIM) using a computationally efficient graph-cut 
 method. We focus on ground states which arise for disorder strengths lower
  or higher than the critical disorder strength at T = 0. These states cons
 ist of correlated “domains” of up and down spins which are separated b
 y rough\, fractal interfaces. They show novel scattering properties with a
  cusp singularity in the correlation function at short distances.\n\n//ind
 ico.ictp.it/event/a11263/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11263/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Coset graphs in log
 arithmic minimal models"
DTSTART;VALUE=DATE-TIME:20111018T100000Z
DTEND;VALUE=DATE-TIME:20111018T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11274@ictp.it
DESCRIPTION:An overview is given of the logarithmic minimal models as prot
 otypical examples of logarithmic CFTs.  In the boundary theory\, multiplic
 ation in the Grothendieck ring of W-projective representations leads to a 
 Verlinde-like formula involving A-type twisted affine graphs and their cos
 et graphs.\nThis provides compact formulas for the conformal partition fun
 ctions with W-projective boundary conditions. On the torus\, modular invar
 iant partition functions are proposed as sesquilinear forms in W-projectiv
 e and rational minimal characters that are encoded by the same coset fusio
 n graphs.\n\n//indico.ictp.it/event/a11274/
LOCATION:SISSA\, Santorio Bldg.\, Room 108 (1st floor)
URL://indico.ictp.it/event/a11274/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: " XXZ Spin-1/2 chain representation of  the one-d
 imensional Bose-Hubbard model at half-filling "\n
DTSTART;VALUE=DATE-TIME:20111019T150000Z
DTEND;VALUE=DATE-TIME:20111019T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11278@ictp.it
DESCRIPTION:We apply a general technique\, based on the similarity renorma
 lization procedure introduced by Glazek and Wilson\, to investigate the st
 rong coupling expansion of the Bose-Hubbard model at half filling. This ap
 proach provides a mapping of the Bose-Hubbard model onto an XXZ spin-1/2 m
 agnetic chain\,  with renormalized exchange energy J and renormalized anis
 otropy parameter Delta.  We then exploit  the  analytical results availabl
 e for the spin-1/2 XXZ model in a finite chain of length N to compute the 
 correlation functions of the Bose-Hubbard model and to compare them with t
 hose obtained from the numerical density matrix renormalization group appr
 oach\; the agreement is very good\,  even at N = 30. Our approach allows t
 o engineer a reliable quantum magnetic analog of the Bose-Hubbard model\, 
 enabling us to show that the superfluid-charge density wave (superfluid-Mo
 tt insulator)  phase transition of the Bose-Hubbard  model corresponds\,  
 for Delta =1 (Delta =-1)  to the spin liquid-antiferromagnet (spin liquid-
 ferromagnet)  phase transition of the XXZ-model.\n\n[with the collaboratio
 n of P. Sodano (Università di Perugia)\, D. Rossini (SNS-Pisa)\, A. Tromb
 ettoni (SISSA)]\n\n//indico.ictp.it/event/a11278/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11278/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Identifying
  the critical state of the Anderson localization transition with its multi
 fractality"\n
DTSTART;VALUE=DATE-TIME:20111020T103000Z
DTEND;VALUE=DATE-TIME:20111020T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11280@ictp.it
DESCRIPTION:Anderson localization is a metal-insulator transition caused b
 y disorder. It has been connected to several phenomena such as conductivit
 y of solids\, transport of light and sound in random media\, and the quant
 um Hall transition.  The scaling theory of localization predicts that all 
 states are localized in 1D and 2D disordered systems.  In 3D there exists 
 a transition point where the eigenstates are critical and have multifracta
 l structure.  I report how this multifractality has recently been observed
  in the Anderson transition of ultrasound in a 3D metal network.  Furtherm
 ore\, using analytic calculations and numerical simulations\, I show that 
 the propagation of electromagnetic polar waves in a 1D array of near-reson
 ant scatterers also follows critical scaling behavior.  This is caused by 
 the long-range interaction between the scatterers\, which is not treated b
 y the scaling theory.\n\n//indico.ictp.it/event/a11280/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11280/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Localization and gl
 assy dynamics of many-body quantum systems"\n
DTSTART;VALUE=DATE-TIME:20111025T100000Z
DTEND;VALUE=DATE-TIME:20111025T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11282@ictp.it
DESCRIPTION:When classical systems fail to explore their entire configurat
 ionalspace\, intriguing macroscopicphenomena like aging and glass formatio
 n may emerge. Also closed quanto-mechanical systems may stop wandering fre
 ely around the whole Hilbert space\, even if they are initially prepared i
 nto a macroscopically large combination of eigenstates.  This phenomenon i
 s actually known to occur in presence of disorder and manifests itself eit
 her by\nsingle-particle [1] or many-particle  [2] wavefunction localizatio
 n. However\, alike classical models for glassy behavior\, ergodicity break
 down may not necessarily require disorder.  [3] In this talk I will report
  numerical evidences that the dynamics of strongly interacting lattice bos
 ons driven sufficiently far from equilibrium can be trapped into extremely
  long-lived inhomogeneous metastable states.  [4] The slowing down of inco
 herent density excitations above a threshold energy\, much reminiscent of 
 a dynamical arrest on the verge of a glass transition\, is identified as t
 he key feature of this phenomenon.  We argue that the resulting long-lived
  inhomogeneities are responsible for the lack of thermalization observed i
 n large systems.  [5] Such a rich phenomenology could be experimentally un
 covered upon probing the out-of-equilibrium dynamics of conveniently prepa
 red quantum states of trapped cold atoms which I will discuss.  The approa
 ch used to extensively investigate this phenomenon is based both on the ex
 act solution of the quantum dynamics and on a novel real- time variational
  Quantum Monte Carlo method we have introduced.  [4] The latter approach o
 ffers a reliable accuracy and stability in the study of 1-dimensional syst
 ems while also o_ering a seamless exploration of higher dimensional geomet
 ries.\nREFERENCES\n[1] P. W. Anderson\, Phys. Rev. 109\, 1492 (1958).\n[2]
  D. Basko\, I. Aleiner and B. Altshuler\, Annals of Physics 321\,1126 (200
 6)\n[3] G. Biroli and M. Mezard Phys. Rev. Lett. 88\, 025501 (2001).\n[4] 
 G. Carleo\, F. Becca\, M. Schiro and M. Fabrizio\, arXiv:1109.2516 (2011).
 \n[5] C. Kollath\, A. M. Lauchli and E. Altman\, Phys. Rev. Lett. 98\, 180
 601 (2007).\n\n//indico.ictp.it/event/a11282/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11282/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Mean field theory f
 or  nonequilibrium network reconstruction"\n
DTSTART;VALUE=DATE-TIME:20111025T130000Z
DTEND;VALUE=DATE-TIME:20111025T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11283@ictp.it
DESCRIPTION:With the advancement of recording technology in various parts 
 of biology\, we can now observe many elements in a biological system at th
 e same time.  For instance we can measure the expression level of many gen
 es using gene microarrays or spike trains from many neurons using multi-el
 ectrode arrays.  Given this\, an important and interesting question to ask
  is "can we use such data to infer interactions between elements of the sy
 stem?".  In this talk\, I will describe toy versions of this problem.  I w
 ill briefly describe how it can be done for an equilibrium Ising model\, t
 hat is the inverse Ising problem\; then I discuss inferring the interactio
 ns of a non-equilibrium Sherrington-Kirkpatrick model showing how Dynamica
 l Mean-Field theory (naive mean field\, TAP and exact MF) can be developed
  and exploited for inferring network connectivity.\n\n//indico.ictp.it/eve
 nt/a11283/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11283/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Local spect
 roscopies and percolating transport in quantum Hall systems: Theory and ex
 periment"\n
DTSTART;VALUE=DATE-TIME:20111027T103000Z
DTEND;VALUE=DATE-TIME:20111027T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11287@ictp.it
DESCRIPTION:Recent advances in high resolution scanning tunneling spectros
 copy of disordered two-dimensional electron systems under high magnetic fi
 eld will be the starting point for theoretical developments aiming at a qu
 antum description of guiding center motion of the usual cyclotron orbits. 
  The emphasis will be put on real-space imaging of Landau states and the d
 escription of some new observables\, such as two-point correlations of den
 sity of states in the quantum Hall regime.\nIn a second part of the talk\,
  macroscopic transport will be studied theoretically in a high temperature
  range where the classical percolation of drift states dominates. Crossove
 r functions are obtained\, which allow the extraction of critical exponent
  from recent conductivity measurements.\n\n//indico.ictp.it/event/a11287/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11287/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Edge properties and
  the  absolute value of the topological angle"\n
DTSTART;VALUE=DATE-TIME:20111108T103000Z
DTEND;VALUE=DATE-TIME:20111108T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11293@ictp.it
DESCRIPTION:I will discuss the role of the absolute value (that is\, not m
 odulo 2\\pi) of the topological angle in conformal sigma models. This will
  be applied to the spin quantum Hall (class C) problem\, where I will show
  that the different plateaus exhibit different transport properties due to
  the presence of extra edge states.\n\n//indico.ictp.it/event/a11293/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11293/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: " What are t
 he relevant disorder scales for  quantum transport in graphene? "
DTSTART;VALUE=DATE-TIME:20111110T103000Z
DTEND;VALUE=DATE-TIME:20111110T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11288@ictp.it
DESCRIPTION:Since the very first investigations of the electronic properti
 es of graphene  the nature of the scattering disorder potential   has been
  shown to play an essential role in determining the carrier density  depen
 dence of the conductance. Impurity scattering is characterized by two diff
 erent times the transport and elastic scattering times  which are sensitiv
 e to the linear energy dispersion of graphene. The analysis of the  ratio 
 between these two times  gives insight on the nature (neutral or charged) 
 and range of  the scatterers. We  discuss how  to extract these two times 
 from magneto-transport measurements and analyze their differences  in mono
 layer and bilayer Graphene in relation with the different symmetry propert
 ies of their band structure and wave functions. We show that whereas short
  range impurity scattering is the dominant mechanism limiting the classica
 l transport\,  phase coherent mesoscopic transport is very sensitive to lo
 ng range disorder. In particular\,  the formation of electron/hole puddles
  in the vicinity  of the charge neutrality point strongly affects the ampl
 itude of the conductance fluctuations and the induced supercurrent in the 
 presence of superconducting electrodes.\n\n//indico.ictp.it/event/a11288/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11288/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sasha Gogolin Memorial Meeting
DTSTART;VALUE=DATE-TIME:20111110T083000Z
DTEND;VALUE=DATE-TIME:20111111T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11295@ictp.it
DESCRIPTION:Detailed programme of the event is available here\n\n//indico.
 ictp.it/event/a11295/
LOCATION:ICTP Adriatico Guest House Denardo Lecture Hall
URL://indico.ictp.it/event/a11295/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sasha Gogolin Memorial Meeting
DTSTART;VALUE=DATE-TIME:20111111T083000Z
DTEND;VALUE=DATE-TIME:20111111T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11296@ictp.it
DESCRIPTION:11 November: from 9:30 to 17:00\, detailed programme of the ev
 ent is available here\n\n//indico.ictp.it/event/a11296/
LOCATION:ICTP Adriatico Guest House Denardo Lecture Hall
URL://indico.ictp.it/event/a11296/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "The inverse Ising p
 roblem for one-dimensional chains with arbitrary finite-range couplings"
DTSTART;VALUE=DATE-TIME:20111115T100000Z
DTEND;VALUE=DATE-TIME:20111115T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11297@ictp.it
DESCRIPTION:Parameter estimation is a central issue in system modeling\, t
 he tipical setting is to start with a given set of measurements and extrac
 t the parameters of a model supposed to describe the system under scrutiny
 . The recent availability of large datasets coming from the complex system
  has made even more pressing the quest for efficient models\, and the rela
 ted parameter extraction techniques.  We study Ising chains with arbitrary
  multispin finite-range couplings\, providing an explicit solution of the 
 associated inverse Ising problem\, i.e. the problem of inferring the value
 s of the coupling constants from the correlation functions. As an applicat
 ion\, we reconstruct the couplings of chain Ising Hamiltonians having expo
 nential or power-law two-spin plus three- or four-spin couplings. The gene
 ralization of the method to ladders and to Ising systems where a mean-fiel
 d interaction is added to general finite-range couplings is also discussed
 .\n\n//indico.ictp.it/event/a11297/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a11297/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Collective 
 dynamics of a Bose-Einstein condensate coupled to light"\n\n
DTSTART;VALUE=DATE-TIME:20111117T103000Z
DTEND;VALUE=DATE-TIME:20111117T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11298@ictp.it
DESCRIPTION:Motivated by recent experiments observing self-organization of
  Bose--Einstein condensates in optical cavities we investigate the collect
 ive dynamics of the associated non-equilibrium Dicke model. We find a rich
  phase diagram including distinct superradiant fixed points\, coexistence 
 phases\, and regimes of persistent oscillations. We explore the intrinsic 
 timescales for observing these novel phases and discuss the implications f
 or finite duration experiments.\n\n//indico.ictp.it/event/a11298/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11298/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "The Casimir effect:
   Present status\, theoretical puzzles and \nfuture perspectives"\n
DTSTART;VALUE=DATE-TIME:20111122T103000Z
DTEND;VALUE=DATE-TIME:20111122T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11301@ictp.it
DESCRIPTION:The seminar will provide a pedagogical introduction to the Cas
 imir effect.\nAn overview will be given of open theoretical puzzles and of
   recent experiments\, with an eye on perpsective applications of the Casi
 mir effect to nanotechnology.\n\n//indico.ictp.it/event/a11301/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11301/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter Physics: "Colloida
 l monolayers on  quasicrystalline surfaces"\n
DTSTART;VALUE=DATE-TIME:20111123T150000Z
DTEND;VALUE=DATE-TIME:20111123T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11305@ictp.it
DESCRIPTION:Monolayers on crystalline surfaces often form complex structur
 es having physical and chemical properties strongly differing from those o
 f their bulk phases.  Such hetero-epitactic overlayers are currently used 
 in nanotechnology and understanding their growth mechanism is important fo
 r the development of novel materials and devices.  Compared to crystals\, 
 quasicrystalline surfaces exhibit much larger structural and chemical comp
 lexity leading e.g. to unusual frictional\, catalytical or optical propert
 ies.  Accordingly\, deposition of thin films onto such substrates can lead
  to novel structures which may even exhibit typical quasicrystalline prope
 rties.  Here we report a real-space investigation of the phase behaviour o
 f a colloidal monolayer interacting with a quasicrystalline decagonal subs
 trate created by interfering five laser beams.  We observe a novel pseudom
 orphic phase which exhibits likewise crystalline and quasicrystalline stru
 ctural properties and can be described by an Archimedean-like tiling consi
 sting of alternating rows of square and triangular tiles.  In addition\, w
 e also investigate the frictional properties of monolayers on quasiperiodi
 c surfaces.  Here\, we find that the particles do not follow the applied e
 xternal force but that their trajectories exhibit characteristic features 
 which resemble kink-like excitations also found on periodic surfaces.\n\n/
 /indico.ictp.it/event/a11305/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11305/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:"Gate-tuned n
 ormal and superconducting transport \nat the surface of a topological insu
 lator"\n\n
DTSTART;VALUE=DATE-TIME:20111124T103000Z
DTEND;VALUE=DATE-TIME:20111124T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11304@ictp.it
DESCRIPTION:Three dimensional topological insulators are a novel quantum s
 tate of matter which exhibits an insulating bulk state and gapless metalli
 c surface. Owing to the large spin-orbit interaction and the ensuing band 
 structure topology\, these surface states behave as massless\, spin-helica
 l Dirac fermions that are protected against backscattering. In this talk I
  present recent results of magnetotransport measurements performed on the 
 3D topological insulator Bi2Se3. The samples studied are nano-connected ul
 tra-thin flakes of high quality Bi2Se3 deposited on a SiO2/Si substrate th
 at acts as a gate electrode. Such back-gated device allows to vary continu
 ously the carrier density by electrostatic doping over the entire Dirac co
 ne of the surface state. Under magnetic field B\, sweeping the gate voltag
 e enables us to control the filling of the Landau levels\, resulting in Sh
 ubnikov-de Haas oscillations of the conductance. The continuous evolution 
 of the SdH oscillations from electron to hole character gives a clear evid
 ence for the Dirac nature of the surface state. After this demonstration o
 f the control of electronic transport through the surface states I’ll sh
 ow that\, when the electrodes are superconducting at B=0\, Cooper pairs ca
 n also be transferred into the surface state leading to a gate-tuned ambip
 olar supercurrent.\n\n//indico.ictp.it/event/a11304/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11304/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Optimal protocols a
 nd optimal transport in the physics of small systems"\n
DTSTART;VALUE=DATE-TIME:20111129T100000Z
DTEND;VALUE=DATE-TIME:20111129T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11309@ictp.it
DESCRIPTION:Small systems in thermal environments such as particles in opt
 ical traps or molecular motors can be driven from one state to another whi
 le dissipating work.  The statistics of work is related to the free energy
  difference between the states by Jarzynski's relation\, but most characte
 ristics of the process e.g. the sample variance of Jarzynski's relation\, 
 or expected released heat or expected work itself depend on protocol detai
 ls.  We show that in a Langevin equation setting the optimal protocol is e
 ssentially given by the backwards-forwards solution of optimal control\, i
 nvestigated long ago by F. Guerra and  L. Morato in the context of stochas
 tic quantization.  For the specific case of optimising heat or work the si
 tuation simplifies dramatically\, and the coupled backwards-forwards solut
 ion reduces to only Burgers equation for an auxiliary field\, and mass tra
 nsport by the Burgers velocity field [1].\nI will discuss these results an
 d possible extensions and applications. For instance\, if temperature is n
 ot constant and time and space an analogous simplification occurs but not 
 for the heat but instead for the entropy production in the environment. Th
 is is joint work with Paolo-Muratore-Ginanneschi\, Carlos Mejia-Monasteiro
 \, Stefano Bo\, Antonio Celani and Ralf Eichhorn.\n\n[1] Erik Aurell\, Car
 los Mejia-Monasterio\, Paolo Muratore-Ginanneschi\;  Optimal protocols and
  optimal transport in stochastic thermodynamics\;  Phys. Rev. Lett. 106\, 
 250601 (2011)\n\n//indico.ictp.it/event/a11309/
LOCATION:SISSA\, Santorio Bldg.\, room 128 1st floor
URL://indico.ictp.it/event/a11309/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special interdisciplinry seminar: "Extracting crises information f
 rom time series"\n
DTSTART;VALUE=DATE-TIME:20111130T150000Z
DTEND;VALUE=DATE-TIME:20111130T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11306@ictp.it
DESCRIPTION:Using a thermodynamic interpretation of multifractal spectra w
 e develop a method to analyze time series.  We apply it to data from epile
 ptic and healthy patients (electroencephalograms) and show that seizures c
 an be clearly distinguished from spurious data.   We also apply it to seve
 ral examples of financial data showing clearly the appearance of crises.  
 Since the analysis is based only on previous data\, it is particularly use
 ful for predictions.\n\n//indico.ictp.it/event/a11306/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11306/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "The atomic 
 quasi-periodic kicked rotor: Experimental test of the universality of the 
 Anderson transition\, critical behaviour and large fluctuations"\n
DTSTART;VALUE=DATE-TIME:20111201T150000Z
DTEND;VALUE=DATE-TIME:20111201T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11308@ictp.it
DESCRIPTION:The quasi-periodic kicked rotor is a one-dimensional system di
 splaying the same metal-insulator Anderson transition than a usual 3D diso
 rdered system.  This model can be experimentally realized using a cold ato
 mic gas\, allowing for a direct measurement of the temporal dynamics.  Acc
 urate measurements of the atomic wavefunction dynamics and the use of fini
 te-size scaling techniques make it possible to measure with a good precisi
 on the value of the critical exponent \\nu and to test its universality.  
 We also study the spatio-temporal evolution of the  wavefunction at the cr
 itical point\, and show that it is well described at short times by self-c
 onsistent theory of localization.  At long times - probably not accessible
  to the present generation of experiments - large deviations are observed\
 , related to the multifractal character of the wavefunctions.\n\n//indico.
 ictp.it/event/a11308/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11308/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Entanglement entrop
 y:  Insights from the two intervals case"\n
DTSTART;VALUE=DATE-TIME:20111206T103000Z
DTEND;VALUE=DATE-TIME:20111206T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11310@ictp.it
DESCRIPTION:While the entanglement entropy for one interval in two dimensi
 onal CFT is sensible only to the central charge\, in the case of many inte
 rvals it includes the full operator content of the theory. We make this st
 atement manifest through an OPE expansion valid for any CFT. This general 
 result is tested quantitatively for the compactified boson and the Ising m
 odel\, where the expressions of the Renyi entropies are derived in terms o
 f Riemann theta functions. Such expressions are checked against numerical 
 data obtained from spin chains.\nThe holographic entanglement entropy for 
 two disjoint intervals in the boundary theory is discussed\, also for the 
 time dependent backgrounds given by the Vaidya metrics\, which model the b
 lack hole formation.\n\n//indico.ictp.it/event/a11310/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11310/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Metal- insu
 lator transition in 2D random fermion systems of chiral symmetry classes"\
 n\n
DTSTART;VALUE=DATE-TIME:20111208T103000Z
DTEND;VALUE=DATE-TIME:20111208T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11312@ictp.it
DESCRIPTION:We consider localization of Dirac fermions in graphene with st
 rong scatterers and\, more generally\, metal-insulator transition in 2D di
 sordered systems with chiral symmetry. A general approach is developed to 
 describe a disordered sample with strong isolated scatterers. This approac
 h provides a basis for an efficient numerical analysis of the charge trans
 port and is applied to calculate the conductivity of undoped graphene with
  resonant impurities. In the case of smooth resonant scatterers\, the symm
 etry class is identified as DIII and conductivity grows logarithmically wi
 th increasing impurity concentration. For vacancies (or strong on-site pot
 ential impurities\, class BDI)\, conductivity saturates at a constant valu
 e that depends on the vacancy distribution among six sublattices. A genera
 l analysis of the metal-insulator transition in 2D system of a chiral symm
 etry class (AIII\, BDI\, and DIII) is based on the replica sigma-model for
 malism. Weak localization corrections to conductivity are absent in all or
 ders of perturbation theory. We identify the non-perturbative contribution
 s due to topological excitations. These excitations have the form of vorti
 ces\; their dynamics leads to the metal-inculator transition analogous to 
 the Berezinskii-Kosterlitz-Thouless transition in the 2D Coulomb gas. This
  vortex-driven mechanism becomes ineffective when the system possesses non
 -trivial topological properties (Wess-Zumino term in class AIII or Z_2 top
 ological term in class CII). This\, in particular\, explains the lack of l
 ocalization on the surface of a 3D topological insulator of class CII.\n\n
 //indico.ictp.it/event/a11312/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11312/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Exciton hierarchies
  in carbon nanotubes"\n
DTSTART;VALUE=DATE-TIME:20111213T100000Z
DTEND;VALUE=DATE-TIME:20111213T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11323@ictp.it
DESCRIPTION:I present evidence that the strong electron-electron interacti
 ons in   gapped carbon nanotubes lead to finite hierarchies of excitons wi
 thin   a given nanotube subband. I study these hierarchies by employing a 
   field theoretic reduction of the gapped carbon nanotube permitting   ele
 ctron-electron interactions to be treated exactly. I analyze this   reduct
 ion by employing a Wilsonian-like numerical renormalization   group. I am 
 so able to determine the gap ratios of the one-photon   excitons as a func
 tion of the effective strength of interactions. I   also determine within 
 the same subband the gaps of the two-photon   excitons\, the single partic
 le gaps\, as well as a subset of the dark   excitons. The strong electron-
 electron interactions in addition lead   to strongly renormalized dispersi
 on relations where the consequences   of spin-charge separation can be rea
 dily observed.\n\n//indico.ictp.it/event/a11323/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a11323/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar: "Nanostructures on metallic surfaces: Novel magn
 etic properties"\n\n
DTSTART;VALUE=DATE-TIME:20111214T150000Z
DTEND;VALUE=DATE-TIME:20111214T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11324@ictp.it
DESCRIPTION:The magnetic properties of nanostructures supported on metalli
 c surfaces are of great interest\, both because of the possibilities of at
 omic engineering of future spintronic devices\, as well as due to the fact
  that such systems challenge our understanding of magnetism in general. He
 re\, our research on the magnetic properties of nano-sized objects adsorbe
 d on different substrates will be reviewed. Such theoretical investigation
 s were performed using DFT (Density Functional Theory) based method\, whic
 h is appropriate to treat complex magnetic structures [1]. From nanowires 
 to corrals\, we have explored the possibility of the occurrence of novel m
 agnetic behaviors. A systematic study of the occurrence of noncollinear ma
 gnetism is presented\, by changing the geometry of the supported nanostruc
 tures\, where intriguing noncollinear magnetic ordering were obtained for 
 Mn nanostructures adsorbed on Pt(111) [2]\, Fe(001) and W(001) surfaces. I
 n particular\, for Mn corrals on Pt(111) surfaces we identified a nano¬ob
 ject presenting very complex stable magnetic configurations\, which can be
  described by topological structures\, as Skyrmions\, in analogy to Z2 vor
 tex¬like structures [2]. Also\, for Mn nanostructures on Fe(001) the effe
 ct of spin-orbit coupling lead to the possibility of half skyrmion. Concer
 ning metallic nanowires of Mn on W(001)\, we show the possibility of reali
 zing complex noncollinear magnetic structures such as helical spin spiral.
  \n[1] A. Bergman\, L. Nordström\, A. B. Klautau\, S. Frota¬Pessôa and 
 O. Eriksson\, Phys. Rev. B 73\, 174434 (2006)\; Phys. Rev. B 75\, 224425 (
 2007). \n[2] M. S. Ribeiro\, G. B. Corrêa Jr.\, A. Bergman\, L. Nordströ
 m\, O. Eriksson\, and A. B. Klautau\, Phys. Rev. B 83\, 014406 (2011).\n\n
 //indico.ictp.it/event/a11324/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11324/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: \n" Theory a
 nd experiments with quantum fluids of light: from superfluid hydrodynamics
  to quantum Hall liquids "
DTSTART;VALUE=DATE-TIME:20111215T103000Z
DTEND;VALUE=DATE-TIME:20111215T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a11325@ictp.it
DESCRIPTION:A few years after the first observation of Bose-Einstein conde
 nsation  in quantum gases of exciton-polaritons in semiconductor microcavi
 ties\,  these systems turn out to be very promising candidates for the stu
 dy of  many-body effects in a novel non-equilibrium context.  In this talk
 \, I shall first present the recent experiments that have  recently demons
 trated superfluid hydrodynamics effects in polariton  gases and I shall tr
 y to address a few conceptual questions on the  meaning of superfluidity a
 nd Bose-Einstein condensation for non-equilibrium systems.  In the second 
 part\, I will review a few most significant theoretical  advances towards 
 the generation of strongly correlated states of photons\, from Tonks-Girar
 deau gases of impenetrable photons in 1D\, to  quantum Hall liquids in the
  presence of artificial magnetic fields.\n\n//indico.ictp.it/event/a11325/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a11325/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Three stud
 ies of correlated electrons on honeycomb lattice"\n
DTSTART;VALUE=DATE-TIME:20120119T103000Z
DTEND;VALUE=DATE-TIME:20120119T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a125@ictp.it
DESCRIPTION:The effect of electron correlation on honeycomb lattice has at
 tracted a lot of interest recently. In this talk\, I will present the resu
 lts of three analytical studies of correlated electrons on honeycomb latti
 ce. In the first study\, we provide an analytical argument for the absence
  of topological degeneracy in the "Mott insulating"  state found recently 
 in the Hubbard model on honeycomb lattice. In the second study\, we propos
 e a SU(2) generalization of staggered flux phase on honeycomb lattice\, wh
 ich reveals the close relation between the RVB physics on square lattice a
 nd honeycomb lattice. In the third study\, we predict that the quarter-dop
 ed Hubbard model on honeycomb lattice will realize a magnetic ordered grou
 nd state with non-zero spin chirality and quantized Hall conductivity. It 
 is argued that such an exotic state should be observable in quarter-doped 
 graphene system.\n\n//indico.ictp.it/event/a125/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a125/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar:\n" Fractional Langev
 in Equation and its application to linear stochastic models "
DTSTART;VALUE=DATE-TIME:20120124T103000Z
DTEND;VALUE=DATE-TIME:20120124T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a129@ictp.it
DESCRIPTION:The Generalized Elastic Model accounts for the dynamics of sev
 eral physical systems\, such as polymers\, fluctuating interfaces\, growin
 g surfaces\, membranes\, proteins and file systems among others. We derive
  the  fractional stochastic  equation governing the motion   of a probe pa
 rticle (tracer) in such kind of  systems. This Langevin equation involves 
 the use of fractional derivative in time and satisfies the Fluctuation-Dis
 sipation relation\, it goes under the name of Fractional Langevin Equation
 . Within this framework the spatial  correlations appearing in the General
 ized Elastic Model are translated into time correlations described by the 
 fractional derivative together with  the space-time correlations of the fr
 actional Gaussian noise. We derive the exact scaling analytical form of se
 veral physical observables such as structure factors\, roughness and mean 
 square displacement. Special attention will be devoted to the dependence o
 n initial conditions and linear-response relations in the case of an appli
 ed potential.\n\n//indico.ictp.it/event/a129/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a129/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter Physics:\n"Interpr
 etation and prediction of nanostructural evolution based on first-principl
 es studies" 
DTSTART;VALUE=DATE-TIME:20120125T153000Z
DTEND;VALUE=DATE-TIME:20120125T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a124@ictp.it
DESCRIPTION:Pattern formation and decay in the early stage of growth is fu
 ndamental to many materials physics and chemistry. Understanding the compl
 ex interplay between factors that influence the evolution of surface-based
  nanostructures can be challenging.  Computer simulation will play an impo
 rtant role in providing insight. In this talk\, I will first introduce a o
 ne-\, two-\, and three-dimensional Ehrlich-Schwoebel (ES) barrier in kinet
 ics-driven growth. Within this framework\, I will show how to control the 
 island shape\, the island instability\, and the film roughness efficiently
 . Furthermore\, I will discuss a novel concept: a true upward adatom diffu
 sion on metal surface\, which is beyond the traditional Ehrlich-Schwoebel 
 (ES) barrier model. This process offers new indications as how to use ab i
 nitio kinetic Monte Carlo simulation can uncover some of the building regu
 lations of the evolution mechanism down to atomic-scale.\n\n//indico.ictp.
 it/event/a124/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a124/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n" Quantum F
 luctuations and Dynamic Clustering of Fluctuating Cooper Pairs "
DTSTART;VALUE=DATE-TIME:20120126T103000Z
DTEND;VALUE=DATE-TIME:20120126T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1210@ictp.it
DESCRIPTION:We derive the exact expressions for the fluctuation conductivi
 ty in two dimensional superconductors as a function of temperature and mag
 netic field in the whole phase diagram above the upper critical field line
  Hc2(T). Focusing on the vicinity of the quantum phase transition near zer
 o temperature we arrive to the conclusion that as the magnetic field appro
 aches the critical field Hc2(0) from above\, a peculiar dynamic state cons
 isting of clusters of coherently rotating fluctuation Cooper-pairs forms. 
 We estimate the characteristic size  QF( H)  and lifetime  QF( H) of such 
 clusters and indicate in the corresponding domain of the phase diagram\, w
 here such phenomenon can be observed. The derived values  QF( H)  and  QF(
  H) allow us to reproduce qualitatively the available results for the quan
 tum fluctuation contributions to the in-plane conductivity\, magnetization
 \, and the Nernst coefficient. Finally we predict the existence of a peak 
 in the zero temperature transverse magneto-conductivity of layered superco
 nductors at fields above Hc2(0).\n\n//indico.ictp.it/event/a1210/
LOCATION:ICTP
URL://indico.ictp.it/event/a1210/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: " Higher level Integ
 rals of Motion from ODEs in the complex plane "
DTSTART;VALUE=DATE-TIME:20120131T103000Z
DTEND;VALUE=DATE-TIME:20120131T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1214@ictp.it
DESCRIPTION:In this talk I will revise the basic ideas underlying a powerf
 ul correspondence between integrable models and ordinary differential equa
 tions (or IM/ODE correspondence\, for short). This spectral equivalence pl
 ayed an important role in the study of PT-symmetry\, providing rigorous pr
 oofs about the spectra of an important class of non-Hermitian Hamiltonians
  based on known integrable results. My intention is to make progress in th
 e opposite direction\, namely to extract information about integrable syst
 ems by using differential equations. The comparison between the eigenvalue
 s of the ODEs and the spectral parameters in certain Quantum Integrable Mo
 dels is considerably well understood for the vacuum state of the latter. F
 or excited states\, however\, results are only known for the problem with 
 su(2) symmetry. Here I will show this can be extended to the su(2|1) super
 -symmetric problem in order to establish the exact correspondence also for
  excited states.\n\n//indico.ictp.it/event/a1214/
LOCATION:SISSA\, Santorio Bldg\, Room 128
URL://indico.ictp.it/event/a1214/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: \n" Competin
 g spin-disordered phases of the spin-1/2 Heisenberg antiferromagnet on the
  Kagome lattice "
DTSTART;VALUE=DATE-TIME:20120202T103000Z
DTEND;VALUE=DATE-TIME:20120202T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1215@ictp.it
DESCRIPTION:Despite years of intense theoretical attack from different dir
 ections\, the ground state of the S = 1/2 Kagome Heisenberg antiferromagne
 t has remained elusive. I will revisit this question within the framework 
 of Gutzwiller projected fermionic wave functions studied using Variational
  quantum Monte Carlo technique. We found the so called U(1) Dirac state\, 
 an exotic algebraic spin liquid\, to have the best variational energy. Whi
 le there were doubts concerning its stability\, experiments have hinted to
 wards a gapless\, algebraic spin liquid behavior. Indeed we show that the 
 U(1) Dirac spin liquid is remarkably stable w.r.t dimerizing towards a lar
 ge class of Valence bond crystal perturbations.\n\nThis stability is also 
 preserved upon addition of a weak 2nd NN exchange couplings. However we fi
 nd\, that upon addition of a weak 2nd NN ferromagnetic coupling\, a non-tr
 ivial valence bond crystal is stabilized\, and has the lowest energy. This
  VBC possesses a non-trivial flux pattern and is a strong dimerization of 
 another competing U(1) gapless spin liquid with a large spinon Fermi surfa
 ce\, the so called uniform RVB state. The U(1) Dirac state and the uniform
  RVB state are shown to be remarkably stable w.r.t. destabilizing into the
  class of Z2 spin liquids.\n\nI will also briefly touch upon my ongoing wo
 rk dealing with a complete group theoretical classification of time-revers
 al invariant Valence bond crystals on the Kagome lattice\, and present som
 e results concerning the properties of the ground state on small clusters 
 which are extracted using the Lanczos method on a given variational wave f
 unction.\n\n//indico.ictp.it/event/a1215/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1215/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Seminar in Statistical Physics: " On the exponents of the 
 critical slowing down in Mode Coupling Theory "
DTSTART;VALUE=DATE-TIME:20120203T103000Z
DTEND;VALUE=DATE-TIME:20120203T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1219@ictp.it
DESCRIPTION:An important prediction of Mode-Coupling-Theory (MCT) is the r
 elationship between the decay exponents in the beta  regime: Gamma2(1-a)/G
 amma(1-2a) = Gamma2(1+b)/Gamma(1+2b)= lambda.  In the original structural 
 glass context this relationship follows from the MCT equations that are ob
 tained making rather uncontrolled approximations. As a consequence\, it is
  usually assumed that the relationship between the exponents is correct wh
 ile lambda has to be treated like a tunable parameter. On the other hand\,
  it is known that in some mean-field spin-glass models the dynamics is pre
 cisely described by MCT. When we are in the so called "schematic" case\,  
 lambda can be computed exactly but\, again\, its computation becomes diffi
 cult when we consider more complex models including finite-dimensional one
 s. We have been able to unveil the physical meaning of lambda in complete 
 generality\, relating the dynamical parameter to the static Gibbs free ene
 rgy and giving\, thus\, a ``recipe'' for its computation. In this new fram
 ework we compute the exponents a and b for some mean-field models and comp
 are our results with numerical simulations or\, when available\, exact res
 ults obtained via purely dynamical equations.\n\n//indico.ictp.it/event/a1
 219/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1219/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Seminar in Statistical Physics: " Ensemble Renormalization
  Group for Disordered Systems "\n
DTSTART;VALUE=DATE-TIME:20120207T103000Z
DTEND;VALUE=DATE-TIME:20120207T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1225@ictp.it
DESCRIPTION:We study a Renormalization Group transformation that can be us
 ed also for models with quenched disorder\, like spin glasses. The method 
 is based on a mapping between disorder distributions\, chosen such as to k
 eep some physical properties (e.g. the ratio of correlations) invariant un
 der the transformation. We validate this Ensemble Renormalization Group by
  applying it to the hierarchical model (both the diluted ferromagnetic ver
 sion and the spin glass version)\, finding results in agreement with Monte
  Carlo simulations.\n\n//indico.ictp.it/event/a1225/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1225/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Seminar in Condensed Matter Physics: "Ab-initio electronic
  structure calculations of Transparent Conducting Oxide (TCO) materials "
DTSTART;VALUE=DATE-TIME:20120208T153000Z
DTEND;VALUE=DATE-TIME:20120208T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1226@ictp.it
DESCRIPTION:Transparent Conducting Oxides (TCO) constitute an unique class
  of materials which combine two physical properties - transparency for vis
 ible spectrum and high electrical conductivity together. TCO's are widely 
 used in a variety of technological applications and are subject of active 
 experimental and theoretical research. Development of an electronic struct
 ure method capable of accurately describing the key physical properties of
  TCO namely - the band gap and electron effective mass has been a subject 
 of enduring interest. \nIn this talk\, I will first discuss the electronic
  band structure of basic TCO's calculated using density functional theory 
 (DFT). It is observed that although the structural parameters are correct\
 , the DFT band gap are severely underestimated compared to experiment. Sin
 ce DFT is a ground state theory and in principle the Kohn-Sham gaps can no
 t be compared with the experiment\, we use the state of the art - GW appro
 ximation technique to calculate the excited states. The implementation of 
 the GW approximation within ABINIT code will be presented in brief. The mo
 difications in the pseudopotential necessary for accurate calculation of t
 he self-energy within the GW approximation is discussed with the help of a
  systematic study of the pseudopotentials for ZnO. The GW results are pres
 ented for ZnO\, SnO_2 and ZnX_2O_4 (X=Al\, Ga and In) spinel structure. Fi
 nally I will also discuss the electronic band structure calculated using t
 he computationally inexpensive Tran-Blaha modified Becke-Johnson potential
  (TB-mBJ) scheme for prototype TCO's and formation energies of native poin
 t defects in ZnAl_2O_4 spinel structure.\n\n//indico.ictp.it/event/a1226/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1226/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on disorder and strong correlations: "Statistical mechanic
 s of harmonic spheres: Glass and jamming transition"
DTSTART;VALUE=DATE-TIME:20120209T103000Z
DTEND;VALUE=DATE-TIME:20120209T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1235@ictp.it
DESCRIPTION:When a fluid is cooled down sufficiently rapidly to avoid crys
 tallization\, its dynamics slow down very rapidly\, and an amorphous solid
  is formed.  This phenomenon is called the glass transition.\nWhen piling 
 randomly in a box more and more spheres\, a density is eventually attained
 \, where all spheres come in contact.  At this density and upon further co
 mpression\, the system acquires rigidity: it is the jamming transition.\nJ
 amming and glass transition are very old statistical mechanics problems th
 at are often associated with one another\, because intuition suggests that
  both phenomenons arise from the same physical effect\, the caging of each
  particle by its shell of neighbours.\nDuring my phd thesis\, I studied an
 alytically a model system of harmonic spheres (soft spheres that repel eac
 h other with finite amplitude and finite range)\, that allows to simultane
 ously study the jamming and the glass transition.\nI will present results 
 obtained on the dynamics near the glass transition\, as well as thermodyna
 mics near the jamming point\, with field theoretic methods and replica the
 ory.\n\n//indico.ictp.it/event/a1235/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1235/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "Quantum current noise in a superconducting singl
 e electron transistor"
DTSTART;VALUE=DATE-TIME:20120210T103000Z
DTEND;VALUE=DATE-TIME:20120210T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1229@ictp.it
DESCRIPTION:We present a method for calculating the asymmetric quantum cur
 rent noise in systems described by a Born-Markov master equation.  The tec
 hnique is particularly suited to describing mesoscopic devices containing 
 Josephson junctions.   As an example we calculate the full frequency depen
 dent current noise in a superconducting single electron transistor tuned t
 o the double Josephson quasiparticle resonance.  Our results are consisten
 t with those obtained in a recent experiment which was able to probe the a
 symmetric noise.\n\n//indico.ictp.it/event/a1229/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1229/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "Energy landscape of fullerene materials:  A comp
 arison of boron to boron nitride and carbon"\n
DTSTART;VALUE=DATE-TIME:20120213T093000Z
DTEND;VALUE=DATE-TIME:20120213T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1228@ictp.it
DESCRIPTION:After the discovery of the C60 fullerene some 25 years ago\, m
 any more hollow and endohedrally doped structures made out of various elem
 entshave been proposed theoretically. However\, since no other fullerenes 
 have been synthesized up to date \, the question arises whether experiment
 alists have just not yet found a way to synthesize these theoretically pre
 dicted fullerenes\, or whether they do not exist at all in nature.\nFollow
 ing the theoretical discovery of the B_80 fullerene by Szwacki  et al\, va
 rious other fullerene and stuffed fullerene structures were proposed but n
 one of them could be synthesized in the  laboratory yet.  Using the minima
  hopping global geometry optimization  method on the density functional po
 tential energy surface we show that the  energy landscape of boron cluster
 s is glass like.\nMedium size boron clusters exhibit many structures which
  are lower in  energy than the cages. This is in contrast to carbon and bo
 ron nitride systems which can be  clearly identified as structure seekers.
  The differences in the potential energy landscape explain why carbon and 
  boron nitride systems are found in nature whereas pure boron fullerenes h
 ave not been found. We thus present a methodology which can make predictio
 ns on the feasibility of the synthesis of new nano structures.\n\n//indico
 .ictp.it/event/a1228/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1228/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter Physics: " Photons
 \, dust and honey bees "
DTSTART;VALUE=DATE-TIME:20120215T153000Z
DTEND;VALUE=DATE-TIME:20120215T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1242@ictp.it
DESCRIPTION:Lévy flights determine how animals search for food\, how eart
 hquakes are distributed\, and how the stock market goes up and down daily.
   \nIn this talk\, I will explain how one can realize  optical materials i
 n which light waves follow Lévy flights\, and which new possibilities thi
 s offers in photonics. \nDisordered photonic materials have surprisingly i
 nteresting physical properties\, and allow to study the fundamental physic
 s of transport processes. On the other hand\, their fascinating optical re
 sponse leads to unexpected effects\, like the efficient trapping of light 
 in thin films. The latter property turns out to be very valuable for impro
 ving thin film photo-voltaic solar cells and creating new light sources.\n
 \n//indico.ictp.it/event/a1242/
LOCATION:SISSA\, Santorio Bldg.\, Room 128 1st floor
URL://indico.ictp.it/event/a1242/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "Transport properties of thin superconducting fil
 ms"
DTSTART;VALUE=DATE-TIME:20120220T100000Z
DTEND;VALUE=DATE-TIME:20120220T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1244@ictp.it
DESCRIPTION:Transport properties of 2D superconducting systems can be very
  different from those of bulk superconductors because thermal and quantum 
 fluctuations of superconducting order parameter are more pronounced and  p
 lay a crucial role.  First we focus on the influence of superconducting fl
 uctuations on dynamics\, while the system is in the normal state but  clos
 e to the superconducting transition.  In the fluctuational regime\, we der
 ive a Ginzburg-Landau-type action under  far-from equilibrium conditions. 
 Then\, utilizing it\, we calculate  the fluctuation-induced density of sta
 tes and Maki-Thomson- and Aslamazov-Larkin-type contributions to the in-pl
 ane electrical conductivity [1\,2].  We propose an experimental setup wher
 e our results can be tested: thin superconducting film sandwiched between 
 a gate and a  substrate\, which have different temperatures and different 
 electrochemical potentials.\nThen\, we concentrate on transport at lower t
 emperatures in close-to-equilibrium conditions investigating influence of 
 quantum fluctuations on the unbinding of vortex-antivortex pairs.  We dete
 rmine the temperature below which quantum fluctuations dominate over therm
 al  fluctuations and describe the transport in this quantum regime.  The  
 crossover from the quantum to the classical regime is discussed and the qu
 antum correction to the classical current-voltage relation is determined [
 3].\n\n[1] Phys. Rev. Lett. 105\, 187003 (2010)\n[2] Phys. Rev. B 84\, 064
 510 (2011)\n[3] Phys. Rev. B  80\, 212504 (2009)\n\n//indico.ictp.it/event
 /a1244/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1244/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "A statistical mecha
 nics perspective on immune networks"\n
DTSTART;VALUE=DATE-TIME:20120221T103000Z
DTEND;VALUE=DATE-TIME:20120221T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1246@ictp.it
DESCRIPTION:We present some recent investigations on systemic features of 
 the immune system\, based on a statistical mechanics approach.  We first i
 ntroduce a mean-field spin-glass model for the interaction between helper 
 cells and the effector branches (B and K cells) able to reproduce\, as eme
 rging properties\, several collective phenomena shown in real immune netwo
 rks (e.g. the connection between autoimmunity and lymphoproliferative diso
 rders or the breakdown of immunosurveillance by lymphocyte unbalance).  We
  also show that this system can be mapped into an associative neural netwo
 rk\, where helper cells directly interact with each other and are able to 
 orchestrate an immune response retrieving "strategies'' previously learnt.
  Then\, we go beyond the fully-connected approximation by introducing dilu
 tion in the interactions between helpers and effectors and show that this 
 makes the former able to retrieve parallel strategies to fight several pat
 hogens simultaneously. That is to say\, dilution\, which is a biological r
 equisite\, results in multitasking capabilities.\n\n//indico.ictp.it/event
 /a1246/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1246/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on on Disorder and strong electron correlations:\n"Localiz
 ation of hybrid particles"
DTSTART;VALUE=DATE-TIME:20120223T103000Z
DTEND;VALUE=DATE-TIME:20120223T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1247@ictp.it
DESCRIPTION:Motivated by various disordered propagation problems with comp
 eting channels\, I study the representative problem of Anderson localizati
 on on an asymmetric two-leg ladder.  The problem is solved by the Fokker-P
 lanck approach\, which is exact in the weak disorder limit.  The localizat
 ion radius of various one dimensional systems\, such as a polaritons or ot
 her hybrid particles\, can be investigated by this model.  These applicati
 ons correspond to parametrically different intra-chain hopping integrals a
 nd/or different disorder amplitudes on the two legs\, situations in which 
 it is non-trivial to predict what dominates the transport in the joint sys
 tem.\nAn extended Dorokhov-Mello-Pereya-Kumar (DMPK) equation is obtained 
 and solved analytically.  Two localization lengths are obtained as functio
 ns of the parameters of the model.  We find that: 1) Near the resonance en
 ergy (where the dispersion curves of the two decoupled and  disorder-free\
 nchains intersect) the "slow'' chain dominates the   localization properti
 es of the ladder. 2) Away from the resonance the   "fast'' chain dominates
  the transmission probability.\n\n//indico.ictp.it/event/a1247/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1247/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Zamolodchikov-Fadde
 ev algebra and  quantum quenches in integrable field theories"\n
DTSTART;VALUE=DATE-TIME:20120228T100000Z
DTEND;VALUE=DATE-TIME:20120228T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1248@ictp.it
DESCRIPTION:Motivated by the study of quantum quenches in integrable field
  theories (IFTs) and in particular the structure of the initial state afte
 r such a quench\, we are led to the investigation of transformations of th
 e Zamolodchikov-Faddeev operators that respect their algebra. After showin
 g that\, unlike in free theories\, linear transformations (Bogoliubov tran
 sformations) do not satisfy this condition\, we explore simple cases of in
 finitesimal transformations that do so and study their properties. Example
 s from typical IFTs like the Sinh-Gordon and Lieb-Liniger models are prese
 nted\, emphasizing the possibility to study quantum quenches.\n\n//indico.
 ictp.it/event/a1248/
LOCATION:SISSA\, Santorio Bldg.\, room 128 1st floor
URL://indico.ictp.it/event/a1248/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on disorder and strong electron correlations: "Geometric c
 rossover between the Kondo effect and the 0.7-anomaly: A Fermi-liquid pers
 pective"
DTSTART;VALUE=DATE-TIME:20120301T103000Z
DTEND;VALUE=DATE-TIME:20120301T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1261@ictp.it
DESCRIPTION:Quantum point contacts and quantum dots\, two elementary build
 ing blocks of semiconducting nanodevices\, both exhibit famously anomalous
  conductance features at low energy scales: the 0.7-anomaly in the former 
 case\, the Kondo effect in the latter. For both effects the conductance sh
 ows a remarkably similar low-energy dependence on temperature (T)\, magnet
 ic field (B) and source-drain voltage.  This has led to the suggestion tha
 t the 0.7-anomaly and the Kondo effect have the same microscopic origin.  
 Here we explore this notion theoretically and experimentally by studying t
 he geometric crossover between a quantum dot and a quantum point contact. 
  We introduce a one-dimensional model that reproduces the essential featur
 es of the geometry- and B-dependence of the conductance at T=0 for both Ko
 ndo effect and 0.7-anomaly.  Though their properties differ markedly at hi
 gh energies\, at low energies there are striking similarities.  We attribu
 te the latter to similar interaction-enhanced spin-fluctuations in regions
  of low charge density and conjecture that these can be described using si
 milar Fermi-liquid theories.  Our predictions are consistent with our expe
 rimental results\, which confirm\, in particular\, that the 0.7-anomaly  e
 xhibits Fermi-liquid behavior at low B and T.  We also explain in detail h
 ow the 0.7-structure at T=B=0 arises from a combination of geometry and in
 teraction effects.\n\n//indico.ictp.it/event/a1261/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1261/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Arrhenius law out o
 f equilibrium"
DTSTART;VALUE=DATE-TIME:20120306T103000Z
DTEND;VALUE=DATE-TIME:20120306T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1263@ictp.it
DESCRIPTION:The Arrhenius law appears in many different physical contexts.
   It is one of the most important laws governing the behavior of systems c
 haracterized by energy scales which are much smaller than the temperature.
   We shall derive and discuss its extension out of equilibrium. We will fo
 cus on classical systems which are out of equilibrium either because they 
 are subjected to non-potential forces or because they are coupled to an ou
 t of equilibrium thermal bath.   A generalization of time-reversal\, that 
 already emerged in the context of fluctuation theorems out of equilibrium\
 , plays a key role in our derivation and will be discussed thoroughly. We 
 shall conclude by discussing applications and further extensions of our re
 sults.\n\nWork in collaboration with Serena Bradde.\n\n//indico.ictp.it/ev
 ent/a1263/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1263/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: " Ions in water: The am
 orphous silica interface and the recombination of H30+ and OH- "
DTSTART;VALUE=DATE-TIME:20120307T150000Z
DTEND;VALUE=DATE-TIME:20120307T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1266@ictp.it
DESCRIPTION:In this talk I will begin by sharing results on the structure 
 and dynamics of ions at the water-amorphous silica interface. For 80 years
 \, scientists have employed models in which ions and water near the silica
  surface form a stagnant layer called the Stern layer.  To account for all
  experimental features\, these models invoke puzzling properties such as t
 he transport of ions through immobile water.  In this talk I will present 
 a realistic theoretical description of the water-amorphous silica interfac
 e. We have successfully constructed and validated a model for the water-am
 orphous silica interface and have begun to examine the fate of biomolecule
 s near this important interface. Our simulations challenge the classical t
 extbook Stern layer model.  Both ions and water exhibit a substantial degr
 ee of mobility\, yet the phenomena the Stern layer was originally invoked 
 to explain\, are reproduced by our calculations.\nIn the second part of my
  talk I will discuss some very recent results on the mechanism of the reco
 mbination of hydronium and hydroxide ions in water. This process following
  water ionization is one of the most fundamental processes determining the
  pH of water. The neutralization step once the solvated ions are in close 
 proximity\, is phenomenologically understood to be fast but the molecular 
 mechanism has not been directly probed by experiments.   We elucidate the 
 mechanism of recombination in liquid water with ab initio molecular dynami
 cs simulations and it emerges as quite different from the conventional vie
 w of the Grotthuss mechanism. The neutralization event involves a collecti
 ve compression of the water wire bridging the ions which occurs in 0.5 ps 
 triggering a concerted triple-jump of the protons. This process leaves the
  neutralized hydroxide in a hypercoordinated state\, with the implications
  that enhanced collective compressions of several water molecules around s
 imilarly hypercoordinated states\, are likely to serve as nucleation event
 s for the autoionization of liquid water.\n\n//indico.ictp.it/event/a1266/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1266/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Engineering
  Dirac points with  ultracold fermions in optical lattices"\n\n
DTSTART;VALUE=DATE-TIME:20120308T103000Z
DTEND;VALUE=DATE-TIME:20120308T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1265@ictp.it
DESCRIPTION:Dirac points lie at the heart of many fascinating phenomena in
  condensed matter physics\, from massless electrons in graphene to the eme
 rgence of conducting edge states in topological insulators.  At a Dirac po
 int\, two energy bands intersect linearly and the particles behave as rela
 tivistic Dirac fermions.  In solids\, the rigid structure of the material 
 sets the mass and velocity of the particles\, as well as their interaction
 s.  A different\, highly flexible approach is to create model systems usin
 g fermionic atoms trapped in an optical lattice\, a method which so far ha
 s only been applied to explore simple lattice structures.  In my talk I wi
 ll report on the creation of Dirac points with adjustable properties in a 
 tunable honeycomb optical lattice.  Using momentum-resolved interband tran
 sitions\, we observe a minimum band gap inside the Brillouin zone at the p
 osition of the Dirac points.  We exploit the unique tunability of our latt
 ice potential to adjust the effective mass of the Dirac fermions by breaki
 ng the inversion symmetry of the lattice.  Moreover\, changing the lattice
  anisotropy allows us to move the position of the Dirac points inside the 
 Brillouin zone.  When increasing the anisotropy beyond a critical limit\, 
 the two Dirac points merge and annihilate each other.  We map out this top
 ological transition in lattice parameter space and find excellent agreemen
 t with ab initio calculations.  Our results not only pave the way to model
  materials where the topology of the band structure plays a crucial role\,
  but also provide the possibility to explore many-body phases resulting fr
 om the interplay of complex lattice geometries with interactions.\n\n//ind
 ico.ictp.it/event/a1265/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1265/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Entanglement in fre
 e-particle models"
DTSTART;VALUE=DATE-TIME:20120313T100000Z
DTEND;VALUE=DATE-TIME:20120313T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1275@ictp.it
DESCRIPTION:Free many-particle systems have relatively simple eigenstates.
   Nevertheless\, these states possess non-trivial entanglement properties 
 which serve as points of orientation for the whole field.  In the talk\, i
 t will be shown how one can obtain them from the correlations in the state
 \, how this leads to a statistical physics problem and what the nature of 
 this problem is.  The resulting spectra\, which contain the basic entangle
 ment information\, will be discussed for a number of cases and an outline 
 of further topics will be given.\n\n//indico.ictp.it/event/a1275/
LOCATION:SISSA\, Santorio Bldg.\, Room 128
URL://indico.ictp.it/event/a1275/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Coulomb dra
 g in graphene"
DTSTART;VALUE=DATE-TIME:20120315T103000Z
DTEND;VALUE=DATE-TIME:20120315T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1270@ictp.it
DESCRIPTION:We study the effect of Coulomb drag between two closely positi
 oned graphene monolayers.  In the limit of weak electron-electron interact
 ion and small inter-layer spacing the drag is described by a universal fun
 ction of the chemical potentials of the layers measured in the units of te
 mperature.  When both layers are tuned close to the Dirac point (i.e. when
  both chemical potentials are much smaller than temperature)\, then the dr
 ag coefficient is proportional to the product of the chemical potentials. 
  In the opposite limit of low temperature the drag is inversely proportion
 al to the product of the chemical potentials.  In the mixed case where the
  chemical potentials of the two layers belong to the opposite limits we fi
 nd that the drag coefficient is proportional to the smaller chemical poten
 tial and inverse proportional to the larger.  For stronger interaction and
  larger values of the inter-layer spacing the drag coefficient acquires lo
 garithmic corrections and can no longer be described by a power law.  Furt
 her logarithmic corrections are due to the energy dependence of the impuri
 ty scattering time in graphene (if both chemical potentials are much large
 r than temperature\, then  these are small and may be neglected). In the c
 ase of strongly doped (or gated) graphene (i.e. when the chemical potentia
 l are much larger than the inverse inter-layer spacing) the drag coefficie
 nt acquires additional dependence on the inter-layer spacing and we recove
 r the usual Fermi-liquid result if the screening length is smaller than th
 e spacing.\n\n//indico.ictp.it/event/a1270/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1270/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Some results on the stri
 pe-glass phase in 2-d and on ergodicity properties\nof the Anderson model"
DTSTART;VALUE=DATE-TIME:20120319T101500Z
DTEND;VALUE=DATE-TIME:20120319T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1281@ictp.it
DESCRIPTION:I will present results on two of my topics of interest. In the
  first part\nwe investigate the existence of a stripe-glass phase in a two
 -dimensional\nsystem with no quenched disorder\, which is however frustrat
 ed by the\ncompetition of interactions on different length scales. The con
 figurational\nentropy is computed through a method applied to frustrated s
 ystems with no\nquenched disorder\, and through a 1/N expansion of the gla
 ss free energy.\nThe stripe-glass phase is connected to the appearance of 
 a finite\noff-diagonal replica correlation function\, below a crossover te
 mperature\,\nrelated to the mobility of defects in the sample. The off-dia
 gonal\ncorrelations in replica space are connected to the asymptotic limit
  of the\ntwo-times dynamic correlation function. Within this approach we f
 ind no\nfinite contribution for the correlation between distinct replicas\
 , which\nresults in a vanishing configurational entropy. Therefore\, we co
 nclude that\nglassiness does not emerge at any temperature in the aforemen
 tioned model.\n\nIn the second part I will present some results on the erg
 odicity properties\nof the Anderson model defined on the Bethe lattice. Ou
 r study is motivated\nby the conjectured existence of a phase for intermed
 iary disorder strength\nvalues whose ergodicity properties are distinct fr
 om the fully ergodic\nextended phase\, as well as from the completely ergo
 dicity broken localised\none. This kind of phase is seen to occur on other
  models such as the\nDirected Polymer with random complex weights. For an 
 ensemble of system's\nrealizations\, we have studied eigenvalues and eigen
 states statistics\nthrough exact diagonalization. In particular we analyse
 d the neighboring\ngaps ratio statistics\, the statistics of inverse parti
 cipation ratios\,\nincluding multifractality analysis. We find evidence of
  the presence of an\nintermediary disorder phase whose corresponding stati
 stics are neither\nexpressing extended nor localised states.\n\n//indico.i
 ctp.it/event/a1281/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1281/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP/SISSA Statistical physics seminar: "Quenching the Lieb-Linige
 r model"
DTSTART;VALUE=DATE-TIME:20120320T103000Z
DTEND;VALUE=DATE-TIME:20120320T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1279@ictp.it
DESCRIPTION:Quantum quenches for the 1D Bose gas (Lieb-Liniger model) are 
 discussed.\nThe first part of the talk discusses how the Algebraic Bethe A
 nsatz can be used for quantum quenches.  As an explicit example we quench 
 the Lieb-Liniger model by instantaneously switching off the interactions. 
  The subsequent time evolution is studied for various correlation function
 s.  The long time average is compared with the predictions of several stat
 istical ensembles.\nThe second part concerns the discussion of the general
 ized Gibbs ensemble for the Lieb-Liniger model by generalizing the well kn
 own TBA equations.\nPossible applications and strategies are discussed.\n\
 n//indico.ictp.it/event/a1279/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1279/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "Full counting statistics of the \ninteracting re
 sonant level model"\n
DTSTART;VALUE=DATE-TIME:20120321T150000Z
DTEND;VALUE=DATE-TIME:20120321T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1280@ictp.it
DESCRIPTION:We discuss the full counting statistics of charge transport th
 rough a nano device and introduce a general way to calculate it numericall
 y at zero-temperature.  We apply this to a strongly correlated model: the 
 interacting resonant level model\; where it turns out we can also calculat
 e the full counting statistics exactly\, to good agreement with the numeri
 cs.  From the analytic properties of the full solution\, we show that the 
 system undergoes charge fractionalization when the bias voltage exceeds a 
 certain threshold.\n\n//indico.ictp.it/event/a1280/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1280/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Artificial 
 magnetic field for photons in a coupled cavity array"\n
DTSTART;VALUE=DATE-TIME:20120322T103000Z
DTEND;VALUE=DATE-TIME:20120322T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1278@ictp.it
DESCRIPTION:In this talk\, I will present some of our recent theoretical r
 esults concerning photons in a coupled cavity array under a synthetic magn
 etic field.  A suitable coupling of the propagation and polarization degre
 es of freedom introduces a geometrical phase for photons tunneling between
  adjacent sites of a coupled cavity array\, which gives rise to the artifi
 cial field.  I will discuss the feasibility of observing strong magnetic f
 ield effects in the optical spectra of realistic systems\, including the H
 ofstadter butterfly spectrum.  I will also touch on the observability of a
  fractional quantum Hall effect for photons in these systems\, which is ex
 pected to appear when effective interactions are induced between photons.\
 n\n//indico.ictp.it/event/a1278/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1278/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical physics: "Avalanches in disordered
  elastic systems"
DTSTART;VALUE=DATE-TIME:20120322T133000Z
DTEND;VALUE=DATE-TIME:20120322T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1286@ictp.it
DESCRIPTION:Disordered systems typically respond non-smoothly to external 
 driving.  This manifests itself in Barkhausen noise\, earthquakes and aval
 anches in granular media.  A simple classical model which describes such p
 henomena quite accurately is a particle driven by a spring on a Brownian r
 andom-force landscape (also known as the ABBM model).  I will present some
  analytical results on statistics of avalanches in this model.  I will the
 n show how the ABBM model arises as the mean-field limit of a spatially ex
 tended elastic interface in a disordered environment. In the end I will di
 scuss the behavior below the upper critical dimension using renormalizatio
 n-group methods.\n\n//indico.ictp.it/event/a1286/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a1286/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Form factors in fin
 ite volume:  Recent developments"\n
DTSTART;VALUE=DATE-TIME:20120327T100000Z
DTEND;VALUE=DATE-TIME:20120327T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1288@ictp.it
DESCRIPTION:A few years ago\, we initiated a research program to investiga
 te the finite volume behaviour of matrix elements of local operators (form
  factors) in quantum field theory.  The testing ground of these ideas is p
 rovided by integrable field theories such as the Lee-Yang\, Ising and sine
 -Gordon models.  The framework we developed can be used to provide a non-p
 erturbative numerical method to determine form factors\, or to verify boot
 strap form factor solutions against the field theory dynamics.  It also se
 rves as a theoretical tool to construct spectral  expansions of correlatio
 n functions in a thermal bath or in a boundary setting\, relevant to conde
 nsed matter problems.  In addition\, it gives us a way to address question
 s of potential interest to lattice QCD.  I plan to review the framework an
 d its applications in a pedagogical manner\, and to discuss briefly the la
 test developments.\n\n//indico.ictp.it/event/a1288/
LOCATION:SISSA\, Santorio Bldg.\,room 128
URL://indico.ictp.it/event/a1288/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar  on Disorder and strong electron correlations: "Majorana f
 ermions and subgap states in spinless p-wave superconducting wires"
DTSTART;VALUE=DATE-TIME:20120329T103000Z
DTEND;VALUE=DATE-TIME:20120329T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1291@ictp.it
DESCRIPTION:Spinless p-wave superconducting wires can be in a topological 
 phase in which they harbor Majorana bound states at their ends.  Although 
 there are no known spinless p-wave superconductors in nature\, several rou
 tes to the artificial creation of such systems have been proposed.  In thi
 s talk\, I will discuss how non-idealities in some of the proposed routes\
 , such as potential disorder and deviations from a strict one-dimensional 
 limit\, affect the topological phase.  In particular\, I'll discuss how th
 e topological phase can persist at weak disorder or for multichannel wires
 \, although some of the signatures of the presence of Majorana fermions ar
 e obscured.\n\n//indico.ictp.it/event/a1291/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1291/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Local equilibration
  and thermalization  after a quantum quench"\n
DTSTART;VALUE=DATE-TIME:20120403T103000Z
DTEND;VALUE=DATE-TIME:20120403T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1296@ictp.it
DESCRIPTION:In this talk I will review some of our recent work on relaxati
 on after a quantum quench.  For dynamics generated by bosonic quadratic  m
 any-body Hamiltonians\, I will show under which conditions the state is lo
 cally described by a Gaussian state in the long time limit.  That is\, sub
 systems converge to Gaussian states in trace norm for large times.  These 
 Gaussian states can be given explicitly and there is no need for time aver
 aging. In the second part of the talk\,  I will introduce a setting in gen
 eral spin systems for which thermalization and thermalization time can be 
 addressed: Fixing the spectrum of the Hamiltonian and picking its basis fr
 om the Haar measure\, the time-dependent state may locally be described by
  the maximally mixed state for almost all times in [0\,T].  Here\, T is al
 gebraically small in the system size.\n\n//indico.ictp.it/event/a1296/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1296/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on  Statistical Physics: "A framework for coevolu
 tion dynamics"
DTSTART;VALUE=DATE-TIME:20120405T153000Z
DTEND;VALUE=DATE-TIME:20120405T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12101@ictp.it
DESCRIPTION:We present a framework with minimal ingredients for the study 
 of coevolution in dynamical networks.  This phenomenon is observed in many
  complex systems in nature and consists of the coexistence of two processe
 s on networks of interacting elements: node state change and rewiring of c
 onnections between nodes.  We consider that the process by which a node ch
 anges its connections\, called rewiring\, and that the process by which a 
 node changes its state\, can have their own dynamics\, characterized by pr
 obabilities Pr and Pc that express the time scales for each process\, resp
 ectively.\nWe describe the process of rewiring in terms of two basic actio
 ns: disconnection and reconnection between nodes\, both based on a mechani
 sm of comparison of their states that in turn occur with different probabi
 lities\, d and r.  Then\, for a given rewiring process\, a coevolution mod
 el corresponds to a specific coupling relation Pc = f(Pr).  The collective
  behavior of a coevolutionary system can be studied on any subspace of the
  parameters Pr\, Pd\, d\, and r.\nAs an application\, for a voterlike node
  dynamics we find that reconnections between nodes with similar states lea
 d to network fragmentation.  The critical boundaries for the onset of frag
 mentation in networks with different properties are calculated on the spac
 e (Pr\,Pc).   The occurrence of a homogeneous connected phase and a fragme
 nted phase in a network is predicted for diverse models\, and agreement is
  found with some earlier results.\nWe also find regions of parameters wher
 e modular structures with nodes in different states coexist for very long 
 times on one large\, connected network.  Thus\, coevolution under some con
 ditions can be seen as a mechanism for the emergence of communities observ
 ed in many real networks.\n\n//indico.ictp.it/event/a12101/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12101/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:"Quantum phas
 es of lattice bosons"
DTSTART;VALUE=DATE-TIME:20120405T103000Z
DTEND;VALUE=DATE-TIME:20120405T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1295@ictp.it
DESCRIPTION:In this talk I will discuss quantum states of bosonic lattice 
 systems and present benchmark results\, based on quantum Monte Carlo simul
 ations\, for phase diagrams.  These systems provide unique opportunities t
 o explore interesting problems in strongly correlated physics\, providing 
 a wide variety of novel ground state phases (e.g. supersolids\, paired pha
 ses\, Bose glass) and phase transitions\, with  the possibility of compari
 son with experiments.  I will be focusing on the following two systems:  \
 ni) bosons in a disordered square lattice potential   ii) bosons interacti
 ng via dipolar interactions in a bilayer geometry. I will present the grou
 nd state phase diagram of both systems as well as finite temperature resul
 ts.\n\n//indico.ictp.it/event/a1295/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1295/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Bose statis
 tics\, crystallization and quantum jamming"\n\n
DTSTART;VALUE=DATE-TIME:20120412T103000Z
DTEND;VALUE=DATE-TIME:20120412T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1294@ictp.it
DESCRIPTION:Indistinguishability of particles plays a major role in destab
 ilizing crystalline order in Bose systems.  \nIn this talk\, this effect w
 ill be semi-quantitatively described in terms of damped quasi-particle mod
 es\, and illustrated in the dual language of Feynman paths.  A robust conf
 irmation of this prediction is provided by means of first-principle simula
 tions of dipolar bosons and bulk condensed helium-four.  Two major implica
 tions are that   a) contrary to conventional wisdom\, zero-point motion al
 one cannot prevent helium-four crystallization at low temperature\, at sat
 urated vapour pressure\, and   b) Bose statistics leads to quantum jamming
  at finite temperature\, dramatically enhancing the metastability of super
 fluid glasses.  Only theoretical studies in which quantum statistics is fu
 lly included can reliably address these issues.\n\n//indico.ictp.it/event/
 a1294/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1294/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "On the quantum anne
 aling of quantum mean-field models"\n
DTSTART;VALUE=DATE-TIME:20120417T103000Z
DTEND;VALUE=DATE-TIME:20120417T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12104@ictp.it
DESCRIPTION:In this talk I will present results obtained on fully-connecte
 d mean-field models of quantum spins with p-body ferromagnetic interaction
 s and a transverse field\, as a toy model for studying quantum annealing o
 f disordered systems.  For p=2 this corresponds to the quantum Curie-Weiss
  model which exhibits a second-order phase transition\, while for p>2 the 
 transition is first order.  We provide a refined analytical description of
  both the static and dynamics properties of these models\, allowing us to 
 study the slow annealing from the pure transverse field to the pure ferrom
 agnet (and vice versa) and discuss the effect of first-order phase transit
 ion and spinodals on the residual excitation energy\, both on finite and e
 xponentially divergent time-scales.  We expect the general features that w
 e found to be relevent for real disordered optimization problems.\n\n//ind
 ico.ictp.it/event/a12104/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12104/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Pricing in 
 a complex financial market: Instability from local measures"\n\n\n
DTSTART;VALUE=DATE-TIME:20120419T103000Z
DTEND;VALUE=DATE-TIME:20120419T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12106@ictp.it
DESCRIPTION:Financial institutions need to price a huge number of instrume
 nts every day\, and each of these instruments is generally priced accordin
 g to models calibrated on financial data.  The key issue\, however\, is th
 at different institutions price the same instruments using different model
 s and data\, i.e. different approximations.  Such a heterogeneous picture 
 might lead to a system of inconsistent prices\, or\, in other words\, to a
 rbitrage opportunities\, i.e. the emergence of strategies yielding a risk 
 free profit.\nIn this talk I will address this issue in the stylized frame
 work of a random economy\, where the differences in the pricing models are
  introduced as differences in the probability measures used to price diffe
 rent financial instruments.  Depending on the variability of such measures
  and the number of assets\, the market may be either in an arbitrage free 
 state or in a state where arbitrage opportunities actually arise.\nThe pro
 blem will be analyzed borrowing techniques from the statistical physics of
  disordered systems: a general solution for the arbitrage region volume in
  the model's parameter space will be derived and discussed\, eventually pr
 oviding numerical evidence for some specific examples.\n\n//indico.ictp.it
 /event/a12106/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12106/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Ultracold a
 toms in optical lattices:  Beyond the Hubbard model"\n\n
DTSTART;VALUE=DATE-TIME:20120426T103000Z
DTEND;VALUE=DATE-TIME:20120426T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12110@ictp.it
DESCRIPTION:We investigate the properties of ultra-cold atomic gases in op
 tical lattices\, which we use as a toy-system to explore the intriguing pr
 operties of strongly correlated quantum many-body systems in periodic pote
 ntials.\nIn this work\, we address the regime of weak and intermediate opt
 ical lattices\, where the conventional description in terms of the single 
 band Hubbard model is not reliable.\nIn the case of bosonic atoms\, we emp
 loy a novel hybrid Monte Carlo technique which allows to simulate the supe
 rfluid to insulator transition in continuous space\, thus going beyond the
  single-band approximation. For fermions\, we apply Kohn-Sham Density Func
 tional Theory (DFT)\, which is the most powerful computational tool routin
 ely used in material science to perform electronic structure simulations. 
 In this work\, we use a new\nenergy-density functional for dilute atomic F
 ermi gases with short-range interactions\, as opposed to the Coulomb inter
 action in electronic systems. The first results based on a local spin-dens
 ity approximation show evidence of a ferromagnetic phase due to the strong
  repulsive inter-species interactions close to a Feshbach resonance\, and 
 of anti-ferromagnetic order at half filling.\nWe will discuss how the deve
 lopment of DFT for ultracold Fermi gases can form a strong link between ma
 terials science and atomic physics.\n\n//indico.ictp.it/event/a12110/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12110/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Fundamental
  aspects of transport in  nanoscale systems and ultra-cold atoms"\n\n
DTSTART;VALUE=DATE-TIME:20120503T103000Z
DTEND;VALUE=DATE-TIME:20120503T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12113@ictp.it
DESCRIPTION:I will discuss some of the most basic questions in fermionic a
 nd bosonic transport\, such as the conditions for the existence of a stead
 y-state current\, its uniqueness\, the role of interactions and spin stati
 stics\, its entanglement entropy\, etc.  This will lead me to introduce an
  alternative viewpoint to conduction - the micro-canonical formalism of tr
 ansport - which is ideal to study the above issues [1]. I will point out t
 he similarities and differences with the widely used Landauer formalism\, 
 and advance a series of predictions that can be verified by loading ultra-
 cold atoms into artificial optical lattices.\n\n[1] M. Di Ventra\, Electri
 cal Transport in Nanoscale Systems (Cambridge University Press\, 2008).\n\
 n//indico.ictp.it/event/a12113/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12113/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Product of free ide
 ntically distributed R-diagonal random matrices"\n
DTSTART;VALUE=DATE-TIME:20120508T103000Z
DTEND;VALUE=DATE-TIME:20120508T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12116@ictp.it
DESCRIPTION:We show that the eigenvalue density of the product of n identi
 cally distributed R-diagonal random matrices from a given matrix ensemble 
 is equal to the eigenvalue density of n-th power of a single matrix from t
 his ensemble in the limit of infinite matrix size. Using this observation 
 one can derive the limiting eigenvalue density of the product of n indepen
 dent identically distributed matrices for non-Hermitian matrix ensembles w
 ith invariant measures. We discuss two examples: the product of n Girko-Gi
 nibre matrices and the product of n truncated unitary matrices.\n\n//indic
 o.ictp.it/event/a12116/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12116/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Current rec
 tification in ac-driven Hamiltonian systems: \nFrom classical to quantum r
 atchets"\n
DTSTART;VALUE=DATE-TIME:20120510T103000Z
DTEND;VALUE=DATE-TIME:20120510T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12115@ictp.it
DESCRIPTION:I will start with a short introduction into the ratchet proble
 m by using a simple model of a particle in an ac-driven periodic potential
 \, give a basic on the symmetry analysis\, and discuss the  mechanisms of 
 current rectification in the Hamiltonian limit.  Theoretical findings are 
 illustrated with the experimental results obtained with cold atoms and opt
 ical potentials.  Next I will turn to  the quantum limit\, specify quantum
  features of ac-driven Hamiltonian ratchets\, and review the recent experi
 mental realization of the quantum flashing/tilting ratchet with BEC of Rub
 idium atoms. Finally\, the performance of quantum ratchets in the presence
  of decoherence will be addressed.\n\n//indico.ictp.it/event/a12115/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12115/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Anisotropic Ginzbur
 g-Landau and Lawrence-Doniach models for ultracold Fermi gases"\n
DTSTART;VALUE=DATE-TIME:20120515T100000Z
DTEND;VALUE=DATE-TIME:20120515T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12121@ictp.it
DESCRIPTION:I will introduce the anisotropic Ginzburg-Landau and Lawrence-
 Doniach models that describe layered superfluids and superconductors\, inc
 luding the large class of high-Tc superconductors. I will show how these e
 quations apply to ultracold Fermi gases in optical lattices. This allows o
 ne to find the temperature of the 3D-2D crossover where the bulk superflui
 d decouples into uncorrelated 2D systems. I will show how this behaviour c
 an be explored in ultracold gases\, and how to reproduce the physics of la
 yered superconductors. I will show how the optical lttice affects the gas 
 differently across the BEC-BCS crossover and that the most interesting beh
 aviour is found near the unitary limit.\n\n//indico.ictp.it/event/a12121/
LOCATION:SISSA\, Santorio Bldg.\, 1st floor- Room 128
URL://indico.ictp.it/event/a12121/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Dilute Bose
  gas in  quasi-2D correlated random potentials"\n
DTSTART;VALUE=DATE-TIME:20120517T103000Z
DTEND;VALUE=DATE-TIME:20120517T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12123@ictp.it
DESCRIPTION:Laser speckles provide a unique possibility to create fully co
 ntrolled two-dimensional disorder potentials for neutral atoms.  This type
  of disorder has exponential probability distribution and finite spatial  
 correlation length.  In this talk\, I shall present our recent results on 
 the superfluidity and Bose-Einstein condensation of interacting bosons in 
 the presence of the laser speckles at zero temperature obtained using diff
 usion Monte Carlo method in continuum as well as Gross-Pitaevskii equation
  and Bogolubov theory.\n\n//indico.ictp.it/event/a12123/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12123/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Impact of meta-orde
 r in the Minority Game"
DTSTART;VALUE=DATE-TIME:20120522T103000Z
DTEND;VALUE=DATE-TIME:20120522T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12131@ictp.it
DESCRIPTION:We study the market impact of a meta-order in the framework of
  the Minority Game. This amounts to studying the response of the market wh
 en introducing a trader who buys or sells a fixed amount h for a finite ti
 me T. This perturbation introduces statistical arbitrages that traders exp
 loit by adapting their trading strategies. The market impact depends on th
 e nature of the stationary state: we find that the permanent impact is zer
 o in the unpredictable (information efficient) phase\, while in the predic
 table phase it is non-zero and grows linearly with the size of the meta-or
 der. This establishes a quantitative link between information efficiency a
 nd trading efficiency (i.e. market impact). By using statistical mechanics
  methods for disordered systems\, we are able to fully characterize the re
 sponse in the predictable phase\, to relate execution cost to response fun
 ctions and obtain exact results for the permanent impact.\n\n//indico.ictp
 .it/event/a12131/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12131/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Superfluidity and locali
 zation in bosonic glasses"\n
DTSTART;VALUE=DATE-TIME:20120523T150000Z
DTEND;VALUE=DATE-TIME:20120523T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12132@ictp.it
DESCRIPTION:Bosons can exhibit superfluid\, density-ordered\, and even gla
 ssy phases. It is interesting to ask whether superfluidity and density ord
 er can coexist\, which requires the simultaneous breaking of two symmetrie
 s with competing order parameters.  We have analyzed a fully connected mod
 el of frustrated bosons\, which indeed exhibits such an intermediate phase
 .  Its hallmarks are anticorrelations between the local order parameters\,
  and a non-monotonous superfluid order parameter as a function of T.\n\nTo
  study transport\, we extend this fully connected model to a Bethe lattice
  with finite but large connectivity.  While thermodynamic properties are i
 nsensitive to quantum fluctuations\, the latter play an important role for
  the dynamics in the glassy insulator.  The glassy order is shown to affec
 t significantly the superfluid-insulator transition\, which is exactly sol
 vable.  In the glassy insulator we find a finite mobility edge for bosonic
  excitations\, which does not close upon approaching the superfluid transi
 tion.\n\n//indico.ictp.it/event/a12132/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12132/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Freezing tr
 ansition: From 1/f landscapes to characteristic polynomials of random matr
 ices and the Riemann zeta-function"
DTSTART;VALUE=DATE-TIME:20120524T103000Z
DTEND;VALUE=DATE-TIME:20120524T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12126@ictp.it
DESCRIPTION:I will argue that the freezing transition scenario\, previousl
 y conjectured to take place in Statistical Mechanics of  1/f-type Random E
 nergy Model\, governs\, after reinterpretation\, the value distribution of
  the maximum of the modulus of the characteristic polynomials of large ran
 dom unitary (CUE) matrices. I then conjecture that the results extend to t
 he large values taken by the Riemann zeta-function over stretches of the c
 ritical line s=1/2+it of constant length\, and present the results of nume
 rical computations of the large values of \\zeta(1/2+it). The main purpose
  is to draw attention to possible connections between the statistical mech
 anics of random energy landscapes\, random matrix theory\,and the theory o
 f the Riemann zeta function.\n\nThe presentation will be based on the join
 t work with G.Hiary and J.P. Keating: Phys. Rev. Lett. 108 \, 170601 (2012
 )\n\n//indico.ictp.it/event/a12126/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12126/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Entanglement entrop
 y of one-dimensional quantum systems"\n
DTSTART;VALUE=DATE-TIME:20120604T130000Z
DTEND;VALUE=DATE-TIME:20120604T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12139@ictp.it
DESCRIPTION:In this talk I will review some of the work on Entanglement En
 tropy that I have carried out in collaboration with various authors since 
 2007. For general 1d Quantum Field Theories\, the central objects are Twis
 t Fields whose correlation functions are directly related to the entropy. 
 In the context of Quantum Spin Chains\, Twist Operators play a similar rol
 e and products thereof can be related to the twist fields in the continuou
 s limit.\nOnce the entropy has been expressed in terms of correlation func
 tions of these fields (or operators on the chain) one may exploit the powe
 rful tools of integrable quantum models to establish new results. We may s
 tudy both the short- and long-distance behaviours of the entropy in variou
 s kinds of theories\, study the matrix elements of twist fields (or twist 
 operators) on their own right\, or investigate the features of other corre
 lation functions involving the twist field. In my talk I will try to touch
  on the main results we have obtained when addressing some of these proble
 ms.\n\n//indico.ictp.it/event/a12139/
LOCATION:SISSA\, Santorio Bldg\, Room 128
URL://indico.ictp.it/event/a12139/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: " Geometry and incompre
 ssibility in \nthe fractional quantum Hall effect"\n
DTSTART;VALUE=DATE-TIME:20120604T150000Z
DTEND;VALUE=DATE-TIME:20120604T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12142@ictp.it
DESCRIPTION:Incompressibility in the fractional QHE is identified as a var
 iant of Mott-Hubbard incompressibility\, where additional electrons are ex
 cluded from a region occupied by a “composite boson” of p electrons in
  q orbitals (or p electrons with q “attached flux quanta”) at Landau-l
 evel filling \\nu = p/q. The new ingredient is that the shape of this “e
 xclusion zone” is described by an intrinsic ”unimodular” (determinan
 t = 1) spatial metric tensor field g_{ab}(x\,t)\, that is a true dynamical
  variable that fluctuates about the shape that minimizes the correlation e
 nergy of the FQH state. It emerges that the electron density is pinned to 
 the combination peB-\\hbar s K_g  rather than to the magnetic flux density
  B alone\, where K_g is the gaussian curvature of the metric\, and s is a 
 new characteristic topologically-quantized ”guiding-center spin” relat
 ed to the so-called ”shift” of the FQH state. This metric can be seen 
 in the Laughlin state as a explicit variational parameter that has remaine
 d hidden for the past thirty years because of a fundamental misinterpretat
 ion of the Laughlin state as a ”lowest Landau level Schrödinger wavefun
 ction”: (in fact it is a guiding-center coherent state that does not dep
 end on which Landau level is partially filled).\n\n//indico.ictp.it/event/
 a12142/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12142/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Star-figures in con
 formal loop ensembles: The stress tensor and some of its descendants"\n
DTSTART;VALUE=DATE-TIME:20120605T103000Z
DTEND;VALUE=DATE-TIME:20120605T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12140@ictp.it
DESCRIPTION:Consider the clusters of same-sign spins in the Ising model. I
 n the scaling limit at criticality\, their boundaries become (countably) i
 nfinitely many loops that don't intersect\, and the Boltzman weight become
 s a probability measure for these loop configurations. Conformal loop ense
 mble (CLE) is a one-parameter family of measures on such loop configuratio
 ns with properties of locality and conformal invariance. It includes the m
 easure obtained from the scaling limit of the critical Ising model\, but a
 lso measures corresponding to all central charges between 0 and 1. It is b
 elieved that this loop description contains all the information of the usu
 al local-operator CFT\, in particular about minimal models. In this talk I
  will tell you how to represent the stress tensor and some of its descenda
 nts as random variables in CLE. The random variables essentially measure h
 ow likely it is that loops be separated by some specific closed curves tha
 t look like stars (with a bit of imagination)\; these stars are made to "r
 otate" at various angular velocities. It is interesting that the star-figu
 re random variables in principle give definitions for the associated stres
 s-tensor descendants even beyond CFT. This talk will be very elementary: I
 'll introduce all necessary notions\, and if time permits I will give you 
 an idea of how the proof works.\n\n//indico.ictp.it/event/a12140/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12140/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Holographic
  insights into non-equilibrium quantum fields'
DTSTART;VALUE=DATE-TIME:20120607T103000Z
DTEND;VALUE=DATE-TIME:20120607T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12141@ictp.it
DESCRIPTION:Understanding dynamical phenomena in strongly coupled systems 
 is an interesting challenge.  While the quantum dynamics has been tackled 
 on its own by a variety of techniques developed over the years\, an import
 ant window into such physics is provided by the holographic AdS/CFT corres
 pondence\, which effectively converts the quantum problem into a classical
  master field dynamics in a suitable limit.  I will review progress made o
 ver the last few years using AdS/CFT in shedding light in out-of equilibri
 um dynamics. Focus will be on elucidating the hydrodynamic regime of inter
 acting field theories and issues regarding thermalization\, etc.\, which w
 ill holographically be related to the behaviour of black holes in the dual
  description.\n\n//indico.ictp.it/event/a12141/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12141/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter Physics: "Mott loc
 alization transition: From semiconductors to supersolids"\n
DTSTART;VALUE=DATE-TIME:20120612T150000Z
DTEND;VALUE=DATE-TIME:20120612T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12146@ictp.it
DESCRIPTION:The Mott metal-insulator transition is 60 years old. Despite m
 ajor recent progress with the help of DMFT it retains mysteries. Ancient e
 xperiments on electron-hole droplets in germanium in silicon display a fir
 st order transition\, similar to that found in the half filled fermion Hub
 bard model. What is the corresponding order parameter? How does one evolve
  from that first order regime to the simple 1949 Mott picture? The issue r
 emains open.\nThe recent discovery of supersolids extends the Mott transit
 ion to Bose liquids. A Bose Hubbard model with integer filling has a choic
 e between superfluidity or localization at zero temperature\, with a secon
 d order transition: as usual bosons are simpler than fermions! In practice
  we want a real crystal where weak crystallization is due to freezing of s
 oft phonon modes: the challenge is to introduce localization into such a s
 pontaneous solid.\nThe seminar will try to put these questions in perspect
 ive. If time allows the issue of supersolidity in He4 will be discussed in
  some detail.  It seems to occur only in defects \, but it opens a whole n
 ew field.\n\n//indico.ictp.it/event/a12146/
LOCATION:SISSA\, Santorio Bldg.\, Room 128 (first floor)
URL://indico.ictp.it/event/a12146/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Top eigenvalue of C
 auchy random matrices"
DTSTART;VALUE=DATE-TIME:20120626T103000Z
DTEND;VALUE=DATE-TIME:20120626T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12150@ictp.it
DESCRIPTION:I present analytical results on the distribution of the larges
 t eigenvalue for random matrices of the Cauchy type.\nMatrices belonging t
 o this ensemble i) have a rotationally invariant weight\, and ii) display 
 a spectral density having support on the full real axis\, which decays as 
 a power law for x\\to\\pm\\infty.\nThe distribution exhibits a central reg
 ime that is governed by a scaling function (analogous to the Tracy-Widom d
 istribution)\, flanked on both sides by large deviation tails.  The corres
 ponding rate functions are computed analytically using a mapping to a Coul
 omb gas system with constraints. The analytical results are corroborated b
 y numerical simulations with excellent agreement.\n\n//indico.ictp.it/even
 t/a12150/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12150/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "The mathematics of poker: Game theory" (Part I)
DTSTART;VALUE=DATE-TIME:20120709T140000Z
DTEND;VALUE=DATE-TIME:20120709T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12154@ictp.it
DESCRIPTION:Game theory is relatively modern branch of mathematics with ma
 ny applications\, for instance\, in economics\, biology and poker.  We'll 
 describe some basic models of game theory\, in particular exactly solvable
  games that can be used as toy model of poker situations: 'game of chicken
 '\, the 'AKQ game' (in its basic Borel and Von Neumann versions\, plus som
 e non trivial extensions)\, the [0\,1]-game\, and the No Limit Holdem Jam-
 or-Fold heads up game (both in cash game and tournaments).  The two semina
 rs will not assume any previous knowledge in game theory or poker.\n\n//in
 dico.ictp.it/event/a12154/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12154/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "The mathematics of poker: Game theory" (Part II)
DTSTART;VALUE=DATE-TIME:20120710T090000Z
DTEND;VALUE=DATE-TIME:20120710T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12155@ictp.it
DESCRIPTION:Game theory is relatively modern branch of mathematics with ma
 ny applications\, for instance\, in economics\, biology and poker.  We'll 
 describe some basic models of game theory\, in particular exactly solvable
  games that can be used as toy model of poker situations: 'game of chicken
 '\, the 'AKQ game' (in its basic Borel and Von Neumann versions\, plus som
 e non trivial extensions)\, the [0\,1]-game\, and the No Limit Holdem Jam-
 or-Fold heads up game (both in cash game and tournaments).  The two semina
 rs will not assume any previous knowledge in game theory or poker.\n\n//in
 dico.ictp.it/event/a12155/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12155/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Deciding about manu
 scripts:  The dynamics of refereeing"\n
DTSTART;VALUE=DATE-TIME:20120710T103000Z
DTEND;VALUE=DATE-TIME:20120710T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12156@ictp.it
DESCRIPTION:How a referee writes a report is interesting for two main reas
 ons. The general one is that it is an example of how humans perform tasks\
 , and in this it is similar to maintaining correspondence\, whether done b
 y letters\, email\, or messaging systems. Here recently debates have raged
  about whether such activity leads - perhaps intrinsically - to power-law 
 statistics and how that would follow from priority queue -type models. The
  second\, not necessarily less important one\, is that it gives us insight
  into how science\, journals\, and peer review works. Here we discuss empi
 rical data from two physics journals\, and what can be distilled from the 
 data. We present a simple "many tasks" model\, which fits the data fairly 
 well. Conclusions are presented about both the issues\, and in particular 
 about refereeing as seen in the light of both the data and models.\n\n//in
 dico.ictp.it/event/a12156/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12156/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Electron gl
 ass"\n
DTSTART;VALUE=DATE-TIME:20120718T150000Z
DTEND;VALUE=DATE-TIME:20120718T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12242@ictp.it
DESCRIPTION:An electron glass (EG) is a disordered film with localized ele
 ctronic states and hopping conduction.  It has a long time relaxation (hou
 rs and days)\, that usually manifests itself in the slow change of the hop
 ping conduction. Moreover\, they may have a memory. Namely\, conductivity 
 of the film as a function of the electron density memorizes the density at
  which it has been cooled. Disordered films of InxO [1]\, films granulated
  by gold [2] or aluminum [3] are examples of EG’s. Important low energy 
 excitations in such a system can be classified as single electron excitati
 ons that feature the so-called Coulomb Gap\, and pair excitations that are
  random dipoles [4]. I argue that the polarization of dipole interactions 
 leads to a “polarization catastrophe” due to interaction of these exci
 tations. As a result dipoles form a dipole glass [5]. I propose that this 
 is at the basis of glassy properties of the system. The width of the “me
 mory dip” is calculated.\n\n1. M Ben-Chorin\, D. Kowal\, and Z. Ovadyahu
 \, Phys. Rev. B44\, 342 (1991).\n2. C.J. Adkins et al. J. Phys. C17\, 4693
  (1984).\n3. T. Grenet\, Eur. Phys. J. B32\, 275 (2003).\n4. A.L. Efros an
 d B.I. Shklovskii\, J. Phys. C8\, L 49 (1975).\n5. B.E. Vugmeister and M.D
 . Glinchuk\, Rev. Modern Phys. 62\, 993 (1990).\n\n//indico.ictp.it/event/
 a12242/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12242/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on  Statistical Physics: "Quasi-equilibrium in gl
 assy dynamics: An algebraic view"\n\n
DTSTART;VALUE=DATE-TIME:20120719T103000Z
DTEND;VALUE=DATE-TIME:20120719T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12243@ictp.it
DESCRIPTION:We study a chain of identical thermodynamic systems in a const
 rained equilibrium where each bond of the chain is forced to remain at a p
 reassigned distance to the previous one.  We apply this description to gla
 ssy systems in the limit of long chain where each bond is close to the pre
 vious one.  We show that in specific conditions this pseudo-dynamic proces
 s can formally describe real relaxational dynamics the long time.  In part
 icular\, in mean field spin glass models we can recover in this way the eq
 uations of Langevin dynamics in the long time limit at the dynamical trans
 ition temperature and below.  We interpret the formal identity as an evide
 nce that in these situations the configuration space is explored in a quas
 i-equilibrium fashion.\nOur general formalism\, that relates dynamics to e
 quilibrium puts slow dynamics in a new perspective and opens the way to th
 e computation of new dynamical quantities in glassy systems.\n\n//indico.i
 ctp.it/event/a12243/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12243/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical physics: "Diffusion with stochasti
 c resetting"
DTSTART;VALUE=DATE-TIME:20120724T103000Z
DTEND;VALUE=DATE-TIME:20120724T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12249@ictp.it
DESCRIPTION:We study a simple model of search where the searcher undergoes
  normal diffusion\, but once in a while resets to its initial starting poi
 nt stochastically with rate  r.  The effect of a finite resetting rate  r 
  turns out to be rather drastic.  It leads to finite mean search time whic
 h\, as a function of  r\,  has a minimum at an optimal resetting rate r_c.
 \nThis makes the search process efficient.\nWe then generalize this model 
 to study multiple searchers.\nResetting alters fundamentally the late time
  decay of the survival probability of a stationary target when there are m
 ultiple searchers: while the typical survival probability decays exponenti
 ally with time\, the average decays as a power law with an exponent depend
 ing continuously on the density of searchers.  We also consider various ge
 neralisations of this simple model.\n\nRefs:\n\nM.R. Evans and S.N. Majumd
 ar\,\n"Diffusion with Stochastic Resetting"\, Phys. Rev. Lett. 106\, 16060
 1 (2011).\n\nM.R. Evans and S.N. Majumdar\, "Diffusion with Optimal Resett
 ing"\, J. Phys. A-Math. & Theor. 44\, 435001 (2011).\n\n//indico.ictp.it/e
 vent/a12249/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12249/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter physics: "X-ray ab
 sorption spectra of water and ice"
DTSTART;VALUE=DATE-TIME:20120725T150000Z
DTEND;VALUE=DATE-TIME:20120725T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12250@ictp.it
DESCRIPTION:X-ray absorption spectroscopy (XAS) is a powerful tool to inve
 stigate matter at the molecular scale\, but requires a good theory of the 
 excitation process as a prerequisite to a consistent experimental interpre
 tation.  New XAS calculations\, based on the GW approximation for the self
 -energy of the excited quasi-electron in presence of a static core hole\, 
 are in good agreement with experiment in liquid water\, hexagonal (Ih) ice
 \, high pressure ice VIII\, and the two amorphous ice forms LDA (low densi
 ty amorphous ice) and HDA (high density amorphous ice).  Good models of di
 sorder are essential to achieve experimental agreement\, and disorder asso
 ciated to the quantal dynamics of the nuclei plays an important role.  Ana
 lysis of the spectral features yields valuable information on the unifying
  aspects of short- and intermediate-range order in these systems.\n\n//ind
 ico.ictp.it/event/a12250/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12250/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Duality of 
 weak and strong scatterer in Luttinger liquid coupled to massless bosons"
DTSTART;VALUE=DATE-TIME:20120817T103000Z
DTEND;VALUE=DATE-TIME:20120817T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12262@ictp.it
DESCRIPTION:We study[1\, 2] electronic transport through a Luttinger liqui
 d with an embedded weak scatterer (WS) or weak link (WL) in the presence o
 f the electron coupling to one-dimensional massless bosons (phonons). We h
 ave found that for an arbitrary fixed strength of boson scattering by the 
 impurity the scaling dimensions of the conductance in the WS and WL cases 
 obeys the duality condition\, ∆WS∆WL = 1\, established for the standar
 d Luttinger liquid [3] (i.e. in the absence of the additional coupling). O
 n the other hand\, with the strength of both fermion and boson scattering 
 by impurity changing from the WS to the WL limit\, the system has a rich p
 hase diagram with a metal-insulator transition as a function of a bare bac
 kscattering amplitude. The transition exists in a certain interval\, defin
 ed by the relative strength of the electron-electron and electron-boson co
 upling and the ratio of Fermi to sound velocities.\n\n[1] A. Galda\, I. V.
  Yurkevich\, and I. V. Lerner\, Phys. Rev. B 83\, 041106 (2011)\; EPL 93\,
  17009 (2011). \n[2] I. V. Yurkevich\, A. Galda\, O. M. Yevtushenko\, and 
 I. V. Lerner\, to be published (2012). \n[3] C. L. Kane and M. P. A. Fishe
 r\, Phys. Rev. Lett. 68\, 1220 (1992)\; Phys. Rev. B 46\, 15233–15262 (1
 992).\n\n//indico.ictp.it/event/a12262/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12262/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Long range interact
 ions for the critical Ising model"\n
DTSTART;VALUE=DATE-TIME:20120918T100000Z
DTEND;VALUE=DATE-TIME:20120918T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12277@ictp.it
DESCRIPTION:In this talk I will report on recent results in the study of f
 erromagnetic long range interactions for the Ising model.  After recalling
  the classical results for this class of interactions\, I will present res
 ults for a numerical study in two dimensions in the intermediate regime an
 d the connection with the short range regime.  Next I will discuss the rel
 evance of the long range interaction versus the short range interaction.  
 Finally\, I will present a proposal for computing  the influence of the lo
 ng-range interactions as a dimensional change for a short range model and 
 compare with the results of the numerical simulations.\n\n//indico.ictp.it
 /event/a12277/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a12277/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Quantum phases of s
 oft core bosons with Rydberg gases"
DTSTART;VALUE=DATE-TIME:20120924T133000Z
DTEND;VALUE=DATE-TIME:20120924T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12281@ictp.it
DESCRIPTION:Motivated by recent experimental efforts to realize quantum ph
 ases of matter with cold atomic Rydberg gases\, I will discuss the phase d
 iagram and excitation spectrum of supersolids in a two dimensional bosonic
  system with soft-core interactions.\nPrevious works [1] showed an excepti
 onal agreement between Monte Carlo simulations and a numerical mean-field 
 approach.  I will present a variational analysis of the Gross-Pitaevskii e
 quation with a non-local interaction term and show that we can quantitativ
 ely reproduce the superfluid-supersolid transition at finite interaction s
 trength in agreement with Monte Carlo results.  We then test the validity 
 of this mean-field analysis perturbing the ground state wave function and 
 looking at the spectrum of the corresponding Bogoliubov equations.  This a
 pproach provides an intuitive physical insight to the low energy dynamics 
 of the system and is validated through the comparison of our findings with
  recent Monte Carlo simulations [2].\n\nReferences\n\n[1] N. Henkel\, F. C
 inti\, P. Jain\, G. Pupillo\, T. Pohl\, Phys. Rev. Lett. 108\, 265301 (201
 2)\n[2] S. Saccani\, S. Moroni\, and M. Boninsegni\, Phys. Rev. Lett. 108\
 , 175301 (2012).\n\n//indico.ictp.it/event/a12281/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a12281/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Entanglement entrop
 y in  long-range harmonic oscillators"\n
DTSTART;VALUE=DATE-TIME:20120925T103000Z
DTEND;VALUE=DATE-TIME:20120925T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12282@ictp.it
DESCRIPTION:We will first present a pedagogical introduction to entangleme
 nt entropy. Then we will define long-range harmonic oscillators as the bui
 lding block of long-range interacting bosonic systems. Using hamiltonian t
 echnique we will calculate the Von Neumann and Renyi entanglement entropy 
 for this system. Different kind of boundary conditions as well as massive 
 harmonic oscillators will be discussed.\n\nReferences\n\nM. Ghasemi Nezhad
 haghighi\, M. A. Rajabpour\, arXiv:1209.1883\n\n//indico.ictp.it/event/a12
 282/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12282/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter Physics: "Actual p
 roblems of physics of cryocrystals"
DTSTART;VALUE=DATE-TIME:20121003T153000Z
DTEND;VALUE=DATE-TIME:20121003T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12287@ictp.it
DESCRIPTION:JOINT ICTP/SISSA\n\nCOLLOQUIUM\n\nON CONDENSED MATTER PHYSICS\
 n\n\n\n\nWednesday\, 3 October -  4:30 p.m.\n\n\n\n\nLuigi Stasi Seminar R
 oom\nICTP Leonardo Building (1st floor)\n\n\n\nYuri A. FREIMAN\n( Verkin I
 nstitute for \nLow Temperature Physics & Engineering\, Kharkov )\n\n\n\n\n
 " Actual problems of physics of cryocrystals"\n\n\n\n\nAbstract\n\nGaseous
  at room temperature or low pressures and solid at low temperatures or hig
 h pressures\, cryocrystals (rare gas solids\, solid hydrogens\, oxygen\, n
 itrogen\, etc.) are one of the richest areas of contemporary physics resea
 rch. As the simplest materials resembling solid-state models\, they are th
 e best testing ground for studying the physics of condensed matter.  A sho
 rt review will be given of new results and actual problems of physics of c
 ryocrystals  which were under discussion at the recent conference  Cryocry
 stals 2012  (Odessa\, Ukraine\, September 2 – 8\, 2012).\n\n//indico.ict
 p.it/event/a12287/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12287/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Glassy phys
 ics\, excitations\, and avalanches in electron glasses"\n
DTSTART;VALUE=DATE-TIME:20121018T103000Z
DTEND;VALUE=DATE-TIME:20121018T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12293@ictp.it
DESCRIPTION:Electron glasses are disordered systems of localized electrons
  with long-range Coulomb interaction\, as found at low temperature in dope
 d semiconductors\, amorphous semiconductors\, and granular metals.\nExperi
 ments on several of these systems demonstrate a very slowly relaxing condu
 ctivity and striking non-equilibrium effects that suggest glassy physics o
 f electronic origin.\nI will review our recent studies of the electron gla
 ss problem\, mostly based on large-scale numerical computations\, addressi
 ng the existence of a thermodynamic glass phase\, the shape of the Coulomb
  gap in the single-particle density of states (which affects the variable-
 range hopping conductivity)\, and the statistics of the charge avalanches 
 induced by a small perturbation of the system.  Throughout the talk I will
  emphasize analogies and differences between electron glasses and spin gla
 sses.\n\n//indico.ictp.it/event/a12293/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12293/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA/Dipartimento di Fisica Colloquium on Condensed Ma
 tter physics: "First coherent radiation from the \nFERMI@Elettra free elec
 tron laser: Status report and plan for the first experiments"\n
DTSTART;VALUE=DATE-TIME:20121024T130000Z
DTEND;VALUE=DATE-TIME:20121024T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12295@ictp.it
DESCRIPTION:The new free-electron laser (FEL) source FERMI@Elettra seeded 
 at 260 nanometers with an external laser has produced the first coherent e
 mission from the FEL-1 undulator chain tuned at wavelengths of 65 nanomete
 rs (fourth harmonic of the seed laser) and 43 nanometers (sixth harmonic).
   This marks the first successful operation of FERMI@Elettra in its planne
 d configuration\, i.e.\, as a next-generation seeded free-electron laser s
 ource.  Over the coming months the commissioning team will continue to imp
 rove the overall performance of the system and the light will be provided 
 to the first experimental programs.  In the meantime the construction of t
 he FEL-2 will be completed and the commissioning started. \nHere I will pr
 esent the scientific program for the first experiments along with the stra
 tegic road map for the commissioning of the entire facility and future upg
 rades.\n\n//indico.ictp.it/event/a12295/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12295/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: " Effect of short-range interactions on the\nquan
 tum critical behavior of spinless fermions on the honeycomb lattice "\n
DTSTART;VALUE=DATE-TIME:20121031T150000Z
DTEND;VALUE=DATE-TIME:20121031T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12304@ictp.it
DESCRIPTION:I present a functional renormalization group investigation of 
 an Euclidean three-dimensional matrix Yukawa model with U(N) symmetry\, wh
 ich describes N = 2 Weyl fermions that effectively interact via a short-ra
 nge repulsive interaction.  This system relates to an effective low-energy
  theory of spinless electrons on the honeycomb lattice and can be seen as 
 a simple model for suspended graphene.  A continuous phase transition is f
 ound which is characterized by large anomalous dimensions both for the fer
 mions and composite degrees of freedom.  The critical exponents define a n
 ew universality class distinct from Gross-Neveu type models\, typically co
 nsidered in this context.\n\n//indico.ictp.it/event/a12304/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12304/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Real space entangle
 ment spectra \nfor large systems"\n
DTSTART;VALUE=DATE-TIME:20121106T100000Z
DTEND;VALUE=DATE-TIME:20121106T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12309@ictp.it
DESCRIPTION:I will present a way to calculate the Particle Entanglement Sp
 ectrum (PES) and Real Space Entanglement Spectrum (RSES) of multi-particle
  systems from their real space wave functions. Our technique allows numeri
 cal calculations for much larger systems than were previously feasible. I 
 will illustrate the method with results on the RSES and PES for the Laughl
 in and Jain composite fermion states and for the Moore-Read state at filli
 ng  nu=5/2 \, for system sizes up to 70 particles.\n\n//indico.ictp.it/eve
 nt/a12309/
LOCATION: SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a12309/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Local atom-
 number fluctuations in quantum gases at finite temperature"\n\n
DTSTART;VALUE=DATE-TIME:20121108T103000Z
DTEND;VALUE=DATE-TIME:20121108T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12308@ictp.it
DESCRIPTION:We investigate the number fluctuations in small cells of quant
 um gases pointing out important deviations from the thermodynamic limit fi
 xed by the isothermal compressibility.  Both quantum and thermal fluctuati
 ons in weakly as well as highly compressible fluids are considered.  For t
 he two-dimensional (2D) superfluid Bose gas we find a significant quenchin
 g of fluctuations with respect to the thermodynamic limit\, in agreement w
 ith recent experimental findings.  An enhancement of the thermal fluctuati
 ons is instead predicted for the 2D dipolar superfluid Bose gas\, which be
 comes dramatic when the size of the sample cell is of the order of the wav
 elength of the rotonic excitation induced by the interaction.\n\n//indico.
 ictp.it/event/a12308/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12308/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: " MicroRNAs: A selec
 tive\, post-transcriptional channel of communication between RNAs "
DTSTART;VALUE=DATE-TIME:20121113T103000Z
DTEND;VALUE=DATE-TIME:20121113T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12313@ictp.it
DESCRIPTION:It has recently been suggested that the competition for a fini
 te pool of microRNAs (miRNA) gives rise to effective interactions among th
 eir common targets (competing endogenous RNAs or ceRNAs) that could prove 
 to be crucial for post-transcriptional regulation (PTR). I shall discuss a
  minimal model of PTR where the emergence and the nature of such interacti
 ons can be characterized in detail at steady state. Sensitivity analysis s
 hows that binding free energies and repression mechanisms are the key ingr
 edients for the cross-talk between ceRNAs to arise. Interactions emerge in
  specific ranges of repression values\, can be symmetrical (one ceRNA infl
 uences another and vice-versa) or asymmetrical (one ceRNA influences anoth
 er but not the reverse) and may be highly selective\, while possibly limit
 ed by noise. However\, I will also show that non-trivial correlations amon
 g ceRNAs can emerge in experimental readouts even in absence of miRNA-medi
 ated cross-talk simply due to transcriptional fluctuations.\n\n//indico.ic
 tp.it/event/a12313/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12313/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Non-equilib
 rium steady states of  boundary-driven open quantum chains"\n
DTSTART;VALUE=DATE-TIME:20121115T103000Z
DTEND;VALUE=DATE-TIME:20121115T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12316@ictp.it
DESCRIPTION:We will discuss a general non-equilibrium setup by which one c
 an approach the quantum transport problem in one dimension.  One considers
  a strongly interacting quantum chain with fully coherent bulk dynamics an
 d driven out of equilibrium in terms of Lindblad dissipators which only ac
 t on degrees of freedom near the boundary\, i.e. at the ends of the chain.
   The non-equilibrium state carrying the physical currents is then approxi
 mated as the steady state of the corresponding Markovian master equation.\
 nIn this talk I will describe several interesting results which have recen
 tly been obtained along these lines. Firstly\, using numerical methods ins
 pired by the density matrix renormalization group\, one can - quite remark
 ably - find examples of diffusive transport in clean\, and even Bethe-ansa
 tz integrable\, strongly interacting systems (at high-temperature near-equ
 ilibrium conditions)\, such as the Heisenberg XXZ spin 1/2 chain and the o
 ne-dimensional fermionic Hubbard model.\nSecondly\, under far from equilib
 rium conditions\, one can find several exact analytical solutions which de
 scribe steady states with anomalous transport properties.  For example\, i
 n the Heisenberg XXZ chain under extreme boundary driving we show that the
  steady-state density operator of a finite system of size N is -- apart fr
 om a normalization constant -- a polynomial of degree 2N-2 in the coupling
  constant.  The perturbative (weak coupling) version of our ansatz is used
  to derive a novel quasi-local conservation law of the anisotropic Heisenb
 erg model\, by means of which we rigorously estimate the spin Drude weight
  (the ballistic transport coefficient) in the easy-plane regime.\n\n//indi
 co.ictp.it/event/a12316/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12316/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Noise-induced metastabil
 ity in biochemical networks"
DTSTART;VALUE=DATE-TIME:20121120T150000Z
DTEND;VALUE=DATE-TIME:20121120T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12322@ictp.it
DESCRIPTION:With recent advances in experimental techniques\, it is becomi
 ng increasingly clear that the dynamics of cellular biochemical reactions 
 are subject to a great deal of noise.  This poses a significant challenge 
 to our understanding of such systems\, as it has been known for some time 
 that the effects of noise may lead to substantial differences in the macro
 scopic behaviour.  Here\, we report analytical progress on this problem ma
 de by studying a simple class of reaction networks whose dynamical behavio
 ur is radically affected by intrinsic stochasticity in finite volume cells
 .  In particular\, we show how networks of this type give rise to a separa
 tion of timescales between fast almost-deterministic oscillations and slow
  stochastic metastability.  Our class includes the influential Togashi-Kan
 eko (TK) reaction scheme\, which has been found to undergo a noise-induced
  dynamical transition via numerical simulations.  Despite the importance o
 f their work\, a satisfactory analytic treatment of this effect has not be
 en achieved in over a decade.  Here we provide such a treatment as an appl
 ication of our theory.\n\n//indico.ictp.it/event/a12322/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a12322/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Thermodynamics and 
 the quantum  stress-energy and spin tensor"\n
DTSTART;VALUE=DATE-TIME:20121121T150000Z
DTEND;VALUE=DATE-TIME:20121121T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12323@ictp.it
DESCRIPTION:In this seminar we show that thermodynamics is sensitive to th
 e existence of a fundamental spin tensor\, predicted by extensions of gene
 ral relativity.  In general\, thermodynamics is not invariant by a change 
 of the stress-energy tensor of a fundamental quantum field with a divergen
 ce transformation leaving the total energy\, momentum and angular momentum
  unchanged. Among the quantities which are changed by such a transformatio
 n\, there are densities at equilibrium with rotation and non-equilibrium o
 nes like transport coefficients and total entropy.  Therefore\, at least i
 n principle\, it could be possible to probe the existence of a spin tensor
  with a thermodynamics experiment.\n\n//indico.ictp.it/event/a12323/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a12323/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Spin liquid
 s in quantum antiferromagnetic models on two dimensional frustrated lattic
 es"\n\n
DTSTART;VALUE=DATE-TIME:20121122T103000Z
DTEND;VALUE=DATE-TIME:20121122T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12324@ictp.it
DESCRIPTION:For many decades physicists have been searching for "hot'' eno
 ugh playgrounds that can melt magnetic freezing even at extremely low temp
 eratures\, purely due to strong quantum fluctuations.  The resulting quant
 um paramagnetic phases of matter called spin liquids\, do not spontaneousl
 y break any symmetries\, possess quantum and topological orders\, and cons
 equently fall outside the paradigm of traditional condensed matter theory 
 based on the Landau's Fermi liquid theory and Landau's theory of phase tra
 nsitions.  Remarkably enough\, the "deceptively'' simple spin-1/2 Heisenbe
 rg antiferromagnetic model\, when put on the most frustrated lattice\, the
  "kagome'' lattice\, has been shown\, both experimentally and theoreticall
 y to host such an exotic state.  I will present my research work dealing w
 ith the precise identification of this state\, which is currently being de
 bated very intensely. I will show\, within fermionic slave particle approa
 ches\, that a certain "marginally'' stable spin liquid with a U(1) low ene
 rgy gauge structure (so-called Dirac spin liquid) is remarkably robust to 
 all known perturbations towards stable Z2 spin liquids and Valence-bond cr
 ystals\, despite having strongly interacting gapless fermionic excitations
  down to zero energy.  Finally\, using state-of-the-art numerical techniqu
 es such as the application of Lanczos steps on variational wave functions 
 combined with Green's function Monte Carlo technique\, I will show that su
 ch an exotic algebraic spin liquid can in fact exist as a real physical sp
 in liquid ground state.\n\nPUBLICATIONS:\n\n1.) Phys. Rev. B 83\, 100404 (
 2011) - Y. Iqbal\, F. Becca\, and D. Poilblanc.\n2.) Phys. Rev. B 84\, 020
 407 (2011) (Editor's suggestion) - Y. Iqbal\, F. Becca\, and D. Poilblanc.
 \n3.) New J. Phys 14\, (in press) (2012)\; arXiv: 1203.3421 - Y. Iqbal\, F
 . Becca\, and D. Poilblanc.\n4.) arXiv: 1209.1858 [cond.mat] (2012) - Y. I
 qbal\, F. Becca\, S. Sorella\, and D. Poilblanc.\n\n//indico.ictp.it/event
 /a12324/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12324/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: "Infinite family of 
 second-law-like inequalities"
DTSTART;VALUE=DATE-TIME:20121127T103000Z
DTEND;VALUE=DATE-TIME:20121127T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12327@ictp.it
DESCRIPTION:The probability distribution function for an out of equilibriu
 m system may sometimes be approximated by a physically motivated "trial" d
 istribution. A particularly interesting case is when a driven system (e.g.
 \, active matter) is approximated by a thermodynamic one. We show here tha
 t every set of trial distributions yields an inequality playing the role o
 f a generalization of the second law. This suggests a variational procedur
 e that may be implemented numerically and even experimentally to approxima
 te the distribution function in terms of effective interactions. The fluct
 uation relation behind this inequality\, -a natural and practical extensio
 n of the Hatano-Sasa theorem-\, does not rely on the a priori knowledge of
  the stationary probability distribution.\n\n//indico.ictp.it/event/a12327
 /
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12327/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical physics seminar: " An alternative roa
 d to  Bethe Ansatz equations"
DTSTART;VALUE=DATE-TIME:20121128T100000Z
DTEND;VALUE=DATE-TIME:20121128T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12328@ictp.it
DESCRIPTION:In the last few years\, a link between Bethe Ansatz equations 
 for conformal field theories and spectral functions of simple ordinary dif
 ferential operators has emerged.  Assuming no prior knowledge of this topi
 c\, this talk will review the key facts about this surprising link and dis
 cuss recent important findings concerning its off-critical generalisation.
 \n\n//indico.ictp.it/event/a12328/
LOCATION:SISSA\, Santorio Building\,  Room 138 (1st Floor)
URL://indico.ictp.it/event/a12328/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "The phase d
 iagram of one-dimensional disordered bosons at ultralow temperature"
DTSTART;VALUE=DATE-TIME:20121129T103000Z
DTEND;VALUE=DATE-TIME:20121129T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12329@ictp.it
DESCRIPTION:The interplay of disorder and interactions can have a large im
 pact on the properties of quantum systems.  It is well known that\, wherea
 s non-interacting particles can be localized by the destructive interferen
 ce in a disordered potential\, a weak repulsive interaction tends to estab
 lish coherence between single-particle localized states\, thus weakening o
 r destroying such localization.  The interplay of disorder and strong inte
 ractions is instead still a challenging problem.  One paradigmatic problem
  is that of low-temperature bosonic particles confined to a one-dimensiona
 l disordered environment\, which\, in addition to the standard superfluid 
 and Mott phases\, has been predicted to show a peculiar gapless insulating
  phase\, the Bose glass [1\,2]\, that is still proving to be elusive in ex
 periments.  We investigate the behavior of a bosonic quantum gas close to 
 T=0 confined in a one-dimensional quasi-periodic lattice\, where interacti
 ons and disorder can be independently tuned.  By studying its momentum dis
 tribution\, mobility and excitation spectrum features\, we trace out a pha
 se diagram showing a coherent phase surrounded by a gapless insulator.  Th
 e latter has a bosonic character at low interactions\, and a fermionic one
  at large interactions\, consistently with the expectations for the presen
 ce of a Bose glass phase.  Our results confirm long-standing theoretical p
 redictions and indicate the way to study still open questions in 1D bosons
  and analogous disordered problems in higher dimensions and/or with fermio
 ns.\n\n[1] D. S. Fisher\, Phys.Rev. B 40\, 546 (1989).\n[2] T. Giamarchi\,
  Phys. Rev. A 78\, 023628 (2008).\n\n//indico.ictp.it/event/a12329/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12329/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: " Relaxation after a
  sudden quench:  Insights from exactly solvable models"\n
DTSTART;VALUE=DATE-TIME:20121204T100000Z
DTEND;VALUE=DATE-TIME:20121204T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12331@ictp.it
DESCRIPTION:I consider the time evolution of observables and reduced densi
 ty matrices after a sudden\nquench of a Hamiltonian parameter in one dimen
 sional systems. I discuss the issue of\nrelaxation and show quite generall
 y that if subsystems relax and can be described in terms\nof a statistical
  ensemble\, dynamical correlations are described by the same ensemble as w
 ell.\nThen I consider quenches in the transverse field Ising chain\, where
  many exact results have\nbeen recently obtained. I focus on the approach 
 to the stationary state (which\, in the specific\ncase\, is a generalized 
 Gibbs ensemble) and discuss the relation between time averages and\nlate t
 ime dynamics.\n\n//indico.ictp.it/event/a12331/
LOCATION:SISSA\, Santorio Building\,  Room 134 (1st Floor)
URL://indico.ictp.it/event/a12331/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Quantum que
 nch in p+ip superfluids: Non-equilibrium topological gapless state"\n\n
DTSTART;VALUE=DATE-TIME:20121206T103000Z
DTEND;VALUE=DATE-TIME:20121206T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12330@ictp.it
DESCRIPTION:Ground state "topological protection" has emerged as a main th
 eme in quantum condensed matter physics.  A key question is the robustness
  of physical properties including topological quantum numbers to perturbat
 ions such as disorder or non-equilibrium driving.\nIn this work we investi
 gate the dynamics of a p+ip superfluid following a zero temperature quantu
 m quench. The model describes a 2D topological superconductor with a non-t
 rivial (trivial) BCS (BEC) phase. We work with the full interacting BCS Ha
 miltonian\, which we solve exactly in the thermodynamic limit using classi
 cal integrability. The non-equilibrium phase diagram is obtained for gener
 ic quenches.  A large region of the phase diagram describes strong to weak
 -pairing quenches wherein the order parameter vanishes in the long-time li
 mit\, due to pair fluctuations.  Despite this\, we find that the topologic
 al winding number survives for quenches in this regime\, leading to the pr
 ediction of a "gapless topological" state.\nWe discuss potential realizati
 ons\, including a proximity effect quench on the surface of 3D topological
  insulator.\n\n//indico.ictp.it/event/a12330/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12330/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Heat fluctuations i
 n a quenched ferromagnet"
DTSTART;VALUE=DATE-TIME:20121207T100000Z
DTEND;VALUE=DATE-TIME:20121207T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12335@ictp.it
DESCRIPTION:The off-equilibrium probability distribution of the heat excha
 nged by a ferromagnet  in a time interval after a quench below the critica
 l point is calculated analytically in the large-N limit.  Here N is the nu
 mber of components of the vectorial order parameter.  The distribution sho
 ws a singular behavior with a critical threshold below which a macroscopic
  fraction of heat is released by the k=0 Fourier mode of the order paramet
 er.  The mathematical structure producing this phenomenon is the same resp
 onsible of the order parameter condensation in the equilibrium low tempera
 ture phase.  The heat exchanged by the individual Fourier modes follows a 
 non trivial pattern\, with the unstable modes at small wave vectors warmin
 g up the modes around a characteristic finite wave vector k_M. Two interna
 l temperatures\, associated to the k=0 and k=k_M modes\, rule the heat cur
 rents through a fluctuation relation similar to the one for stationary sys
 tems in contact with two thermal reservoirs.\n\n//indico.ictp.it/event/a12
 335/
LOCATION:SISSA\, Santorio Building\,  Room 138 (1st Floor)
URL://indico.ictp.it/event/a12335/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Entanglement\, nonl
 ocality\, signaling and cloning"
DTSTART;VALUE=DATE-TIME:20121211T103000Z
DTEND;VALUE=DATE-TIME:20121211T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12337@ictp.it
DESCRIPTION:Quantum entanglement between two far-away constituents of a co
 mposite system\, when considered in conjunction with a measurement process
  on one of them\, raises some serious problems due to the instantaneous re
 duction of the state of the other. In some sense one could state that an a
 ction performed in a given space time region can affect immediately a syst
 em which is space like separated from it.\nIt is not surprising that this 
 peculiar aspect of quantum mechanics has given rise\, from the seventies u
 p to now\,  to many proposals to achieve superluminal communication betwee
 n distant observers. Almost all such proposals have been shown to be wrong
   on the basis of general theorems by P. Eberhard and by our group.\nHowev
 er\, in 1982\, a quite tricky new proposal has been put forward by N. Herb
 ert whose refusal required the derivation of a new theorem\, which has pla
 yed and plays an important role for quantum computation and quantum commun
 ication: the no-cloning theorem.\nThe seminar intends to briefly review th
 e debate about this interesting issue which involves many subtle aspects o
 f quantum mechanics and to make clear the events which led to the derivati
 on of the no-cloning theorem.\nFinally\, attention will be paid to the gen
 eral problem of the compatibility of the reduction process "at-a-distance"
  and relativistic requirements\, specifically in the light of the recent p
 roposals of relativistic generalizations of  "collapse theories".\n\n//ind
 ico.ictp.it/event/a12337/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12337/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Condensatio
 n vs lasing and superfluidity of  coupled light-matter systems"\n
DTSTART;VALUE=DATE-TIME:20121213T103000Z
DTEND;VALUE=DATE-TIME:20121213T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12336@ictp.it
DESCRIPTION:The great experimental progress in realising and studying pola
 riton condensates has made it possible to now study experimentally a numbe
 r of fundamental questions about the relation between lasing\, condensatio
 n\, coherence and superfluidity.  In my talk\, I will discuss the conseque
 nces of finite particle lifetime on several of these questions.  I will di
 scuss the relation between lasing as described by the Maxwell-Bloch equati
 ons and polariton condensation\, and discuss the consequences of this for 
 both polariton and photon condensation [1].  I will also address aspects o
 f superfluidity [2]\, pattern formation [3] and coherence[3]\, and discuss
  how these are  affected by the finite lifetime of polaritons.\n\n[1] J. K
 eeling\, M. H. Szymanska\, and P. B. Littlewood p. 293 of Optical generati
 on and control of quantum coherence in semiconductor\n       nanostructure
 s (2010) Eds. G. Slavcheva and P. Roussignol\n[2] J. Keeling\, Phys. Rev. 
 Lett. 107 080402 (2011) \n[3] J. Keeling and N. G. Berloff Phys. Rev. Lett
 . 100 250401 (2008)\n[4] G. Roumpos et al\, Proc. Natl. Acad. Sci\, 109 64
 67(2012)\n\n//indico.ictp.it/event/a12336/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12336/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Quantum quench in t
 he sinh-Gordon model"
DTSTART;VALUE=DATE-TIME:20121214T130000Z
DTEND;VALUE=DATE-TIME:20121214T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12340@ictp.it
DESCRIPTION:We study a quantum quench in the sinh-Gordon model starting fr
 om a large initial mass and zero initial interaction and quenching to any 
 value of the mass and interaction. Such a quench can be approximated by a 
 Dirichlet initial state which\, being an example of a so-called "squeezed 
 vacuum" state\, can be evolved in time using earlier work [1]. However the
  use of an idealized Dirichlet state leads to UV divergences and it turns 
 out that the UV behaviour of the actual initial state is relevant to the c
 alculation of physical observables. Based on a general method to expand th
 e initial state on the post-quench energy eigenstates [2]\, we verify that
  the actual state is of the squeezed vacuum form and derive the correct UV
  modification that has to be applied on the Dirichlet state in order to de
 scribe a quantum quench. We compare with different UV regularization schem
 es that have been proposed and comment on the applicability of renormaliza
 tion group tools in quantum-quench problems.\n\n[1] D. Fioretto\, G. Mussa
 rdo\, Quantum Quenches in Integrable Field Theories\, New J.Phys.12 055015
 \, 2010.\n[2] S. Sotiriadis\, D. Fioretto\, G. Mussardo\, Zamolodchikov-Fa
 ddeev Algebra and Quantum Quenches in Integrable Field Theories\, J. Stat.
  Mech. (2012) P02017\, 2012.\n\n//indico.ictp.it/event/a12340/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a12340/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Ultracold atoms wit
 h tunable interactions in confined geometry"
DTSTART;VALUE=DATE-TIME:20121218T100000Z
DTEND;VALUE=DATE-TIME:20121218T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12345@ictp.it
DESCRIPTION:Ensembles of ultracold atoms and molecules loaded into lattice
  potentials are ideally suited to perform model studies of condensed matte
 r systems. In fact\, the hope is that ultracold atoms and molecules will s
 ome day find use as “quantum simulators” to simulate the properties of
  a complex many-body system in a fully quantum way.  I will present a seri
 es of experiments with ultracold atoms in lattices for we tune the interac
 tion properties. For example\, we produce a meta-stable Mott state pinned 
 by attractive interactions. In one-dimensional geometry\, we investigate t
 he transition to a pseudo anti-ferromagnetic state. I will outline our att
 empts to go beyond local interactions by preparing dipolar quantum gases o
 f heteronuclear molecules.\n\n//indico.ictp.it/event/a12345/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a12345/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Topological blockad
 e and braiding  of non-Abelian anyons via interactions"\n
DTSTART;VALUE=DATE-TIME:20121219T103000Z
DTEND;VALUE=DATE-TIME:20121219T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12344@ictp.it
DESCRIPTION:The fractionally charged quasiparticles appearing in the 5/2 f
 ractional quantum Hall plateau are predicted to have an extra non-local de
 gree of freedom\, known as topological charge.  I will show how this topol
 ogical charge can block the tunnelling of these particles\, and how such '
 topological blockade' can be used to readout their topological charge.  Mo
 reover I will examine more in general the role that interactions between n
 on-Abelian anyons play in topological quantum computation and how these in
 teractions can be exploited to implement braiding operators.\n\n//indico.i
 ctp.it/event/a12344/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a12344/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "The Yang-Ba
 xter equation and diffraction"\n
DTSTART;VALUE=DATE-TIME:20121220T103000Z
DTEND;VALUE=DATE-TIME:20121220T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a12346@ictp.it
DESCRIPTION:Integrable interactions are synonymous with non-diffractive sc
 attering\, meaning that the set of incoming momenta for any scattering eve
 nt coincides with the set of outgoing momenta.  A system is integrable if 
 the two particle scattering matrix obeys a particular relation known as th
 e Yang-Baxter equation.  Nonintegrable interactions correspond to diffract
 ive scattering\, where the set of outgoing momenta may take on all values 
 consistent with energy and momentum conservation. Such processes play a vi
 tal role in the kinetics of one dimensional gases\, where binary collision
 s are unable to alter the distribution function.\nIn this talk I'll discus
 s how diffractive scattering arises when the Yang-Baxter equation is viola
 ted\, and show how to calculate the diffraction amplitude when this violat
 ion is small.\n\n//indico.ictp.it/event/a12346/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a12346/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Corner contribution
  to percolation cluster numbers"\n
DTSTART;VALUE=DATE-TIME:20130115T103000Z
DTEND;VALUE=DATE-TIME:20130115T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a134@ictp.it
DESCRIPTION:We study the number of clusters in 2d critical percolation\, N
 Γ \, which intersect a given subset of bonds\, Γ. In the simplest case\,
  when Γ is a simple closed curve\, NΓ is related to the entanglement ent
 ropy of the critical diluted quantum Ising model\, in which Γ represents 
 the boundary between the subsystem and the environment. Due to corners in 
 Γ there are universal logarithmic corrections to NΓ \, which are calcula
 ted in the continuum limit through conformal invariance making use of the 
 Cardy-Peschel formula. The exact formulae are confirmed by large scale Mon
 te Carlo simulations. These results are extended to anisotropic percolatio
 n where they confirm a result of discrete holomorphicity.\n\nI. A. Kovács
 \, F. Iglói and J. Cardy\, Phys. Rev. B 86\, 214203 (2012)\, arXiv:1210.4
 671\n\n//indico.ictp.it/event/a134/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a134/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlation: "Graphene wit
 h vacancies: Density of states\, transport\, multifractality"\n\n
DTSTART;VALUE=DATE-TIME:20130117T103000Z
DTEND;VALUE=DATE-TIME:20130117T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a137@ictp.it
DESCRIPTION:A single vacancy in an otherwise clean flake of graphene intro
 duces a topological defect.  It punches a new state at zero energy into th
 e Dirac cone (zero mode). A finite concentration of such vacancies produce
 s a narrow impurity band that determines the low energy/frequency response
  of the flake. A peculiarity of this band is that its properties are very 
 sensitive to details of the impurity placings:\nAll impurities in one subl
 attice imply a density of states (DoS) vanishing in the zero energy limit\
 , while impurities distributed equally over both sublattices (compensated)
  exhibit a diverging DoS.\n\nWe present a numerical study focussing mainly
  on the DoS at very low energies. We resolve the Dyson-singularity with co
 mpensated disorder and investigate the amplitude statistics (multifractali
 ty) of the associated wavefunctions. Finally\, we present transport calcul
 ations addressing the possibility of Anderson-localization on percolation 
 clusters preempting the classical localization transition.\n\n//indico.ict
 p.it/event/a137/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a137/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Dynamics of highly 
 excited many-body states -- diffusion and localization at finite entropy"
DTSTART;VALUE=DATE-TIME:20130122T100000Z
DTEND;VALUE=DATE-TIME:20130122T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1318@ictp.it
DESCRIPTION:I will survey some recent ideas and results on transport and d
 ynamics of excited interacting systems with and without disorder.  While i
 n some cases existence of macroscopic diffusion can be verified\, in other
  cases\, e.g. in the presence of localization on microscopic scales\, emer
 gence of diffusion may be thwarted.  The conditions for existence of such 
 many body localized phases appear to be generic\, provided the disorder is
  strong and interactions are sufficiently short ranged.\n\n//indico.ictp.i
 t/event/a1318/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a1318/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Overview of 1D tens
 or networks and their application to quantum phase transitions"\n
DTSTART;VALUE=DATE-TIME:20130129T103000Z
DTEND;VALUE=DATE-TIME:20130129T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1323@ictp.it
DESCRIPTION:I will introduce Tensor Network states and explain in this con
 text two strategies for extracting universal quantities at conformal invar
 iant fixed point of spin chains. One of them the scaling approach is bette
 r suited to simple tensor networks such as matrix product states and tree 
 tensor networks. More sophisticated tensor networks (such as the MERA) all
 ow to directly extract universal properties from the tensors of the networ
 k.\nI will present results obtained through both approaches.\n\n//indico.i
 ctp.it/event/a1323/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1323/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Informal seminar on Statistical Physics : "Entrop
 y barriers and glass-like behaviour in \nmartensitic models without extrin
 sic disorder"\n
DTSTART;VALUE=DATE-TIME:20130204T140000Z
DTEND;VALUE=DATE-TIME:20130204T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1330@ictp.it
DESCRIPTION:A 2D model of three-valued discrete-strain pseudospins S (r)=0
 \, +1\,-1 is studied in Monte Carlo simulations\, under systematic tempera
 ture quenches\, without extrinsic disorder [1].  The reduced model is from
  Landau minima of a continuum-strain free energy of the square-rectangle m
 artensitic transition. The pseudospins interact via a power-law anisotropi
 c potential obtained from the St Venant Compatibility constraint.  The sam
 e procedure yields pseudospin models for other 2D and 3D transitions [2]. 
  After a temperature quench\, dilute martensitic seeds in an austenite bac
 kground\, induce sequential  domain-wall phases of a 'vapour' of a martens
 ite droplet in austenite\; a  'liquid' of disordered martensite domain wal
 ls\; and a ‘crystal’ of oriented-wall twins.  The evolution is tracked
  through Temperature-Time –Transformation (TTT) curves\, with time scale
 s for conversion to martensite t_m (T)\;  and Compatibility-driven domain-
 wall orientation\, t_C (T).  Depending on elastic constants\, t_m (T)  can
  either be thermally activated and slow\, as in 'isothermal' martensites\;
  or non-activated and explosive\, as in 'athermal' martensites below a mar
 tensite start temperature ~ T_1.  For quenching to above such a temperatur
 e\, we find (generically)  a delay tail\, that rises towards a temperature
  T=T_4  > T_1.  This is identified with the puzzling delay tail in t_m (T)
  found by Kakeshita [3].  The mean time shows glass-like Vogel-Fulcher beh
 aviour\, t_m ~ exp [ 1/( T_4 - T)]\, and distributions are log-normal [1].
   The times are insensitive to the Hamiltonian energy scale E_0\, and are 
 attributed to entropy barriers that vanish/ diverge at T_1 and T_4.  The c
 onversion delays are from searches in Fourier space on constant-energy sur
 faces\, for rare energy-lowering pathways.  The 'vapour' phase structure-f
 actor peak has to find pathways to distort and roll into a small anisotrop
 ic 'golf hole'\; to be then guided by a 'funnel' into a 'liquid' phase\;  
 and finally symmetry-broken\, to a 'crystal' phase.  A time- dependent  ef
 fective temperature re-equilibrates to the bath temperature.  The entropic
  golf-hole\, and energetic funnel\, are concepts from protein folding [4].
 \n\n[1] N. Shankaraiah\, K.P.N. Murthy\, T. Lookman and S.R .Shenoy\, Euro
 phys. Lett. 92\, 36002 (2010)\; Phys. Rev. B 84\, 064119 (2011) \; and unp
 ublished.\n[2]  S.R. Shenoy\, T. Lookman and A. Saxena\, Phys. Rev. B 82\,
  (2010).\n[3] T. Kakeshita\, T. Fukuda and T. Saburi\, Scr. Mater. 34\, 1 
 (1996)\; L. Mueller\, U. Klemradt and T.R. Finlayson\, Mater. Sci. Eng. A\
 , 438\, 122 (2006).\n[4] P.G. Wolynes\, et al. Science 267\, 1619 (1995)\;
  D.J. Bicout and A. Szabo\, Protein Science 9\, 452 (2000)\; N. Nakagawa\,
  Phys. Rev. Lett.98\, 128104 (2007).\n\n//indico.ictp.it/event/a1330/
LOCATION:SISSA\, Santorio Building\,  Room 5 (ground floor)
URL://indico.ictp.it/event/a1330/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISA Statistical Physics seminar: "Entanglement spectra
 :  A novel spectroscopic tool to investigate \nquantum many body wave func
 tions"\n
DTSTART;VALUE=DATE-TIME:20130205T103000Z
DTEND;VALUE=DATE-TIME:20130205T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1329@ictp.it
DESCRIPTION:The entanglement spectrum\, ie the logarithm of the eigenvalue
 s of reduced density matrices of quantum many body wave functions\, has be
 en the focus of a rapidly expanding research endeavor recently.  Initially
  introduced by Li & Haldane in the context of the fractional quantum Hall 
 effect\, its usefulness has been shown to extend to many more fields\, suc
 h as topological insulators\, fractional Chern insulators\,\nspin liquids\
 , continuous symmetry breaking states\, etc.\nAfter a general introduction
  to the field we review some of our own contributions to the field\, in pa
 rticular the perturbative structure of the entanglement spectrum in gapped
  phases\, the entanglement spectrum across the Mott-insulator transition i
 n the Bose-Hubbard model\, and the relation of the entanglement spectrum o
 f (1+1) dimensional quantum critical systems to the operator content of th
 eir underlying CFT.\n\n//indico.ictp.it/event/a1329/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1329/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Bose-Einste
 in condensed gas with equal Rashba and Dresselhaus spin-orbit coupling"\n
DTSTART;VALUE=DATE-TIME:20130207T103000Z
DTEND;VALUE=DATE-TIME:20130207T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1328@ictp.it
DESCRIPTION:We consider a spin-orbit (SO) coupled configuration of spin-1/
 2 interacting bosons with equal Rashba and Dresselhaus couplings. The phas
 e diagram of the system at T=0 is discussed with special emphasis on the r
 ole of the interaction\, treated in the mean-field approximation. For a cr
 itical value of the density and of the Raman coupling we predict the occur
 rence of a characteristic tricritical point separating the stripe\, the sp
 in polarized and the zero momentum states of the Bose gas. The role of the
  breaking of spin symmetry in the interaction Hamiltonian\, as well as the
  compressibility and the spin polarizability of the system are discussed.\
 nBy using the hydrodynamic formalism we identify the excitation spectrum a
 t zero temperature. The propagation of phonons is strongly affected by the
  SO coupling and the velocity of sound vanishes when one approaches the se
 cond order phase transition between the spin polarized and the zero moment
 um quantum phases. We also point out the emergence of a roton minimum in t
 he excitation spectrum for small values of the Raman coupling\, when one a
 pproaches the transition to the stripe phase.\n\n//indico.ictp.it/event/a1
 328/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1328/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Clifford algebra fo
 r complex problems"
DTSTART;VALUE=DATE-TIME:20130212T100000Z
DTEND;VALUE=DATE-TIME:20130212T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1334@ictp.it
DESCRIPTION:In this talk I will present some complex\, NP-complete problem
 s\, formulated in Clifford (spinor) Algebra. I will show that typically th
 ese problems require only a polynomial number of Clifford multiplications.
  I will then treat briefly the computational complexity of Clifford operat
 ions.\nSubsequently I will present some results for Clifford algebras in a
 rbitrary dimension that allow to better tackle the initial formulation of 
 the complex problems.\n\n//indico.ictp.it/event/a1334/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a1334/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Critical an
 d thermodynamic properties of lattice bosons"\n
DTSTART;VALUE=DATE-TIME:20130214T103000Z
DTEND;VALUE=DATE-TIME:20130214T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1337@ictp.it
DESCRIPTION:We investigate\, using series expansion techniques\, the effec
 ts of higher-body local interactions in softcore lattice bosons and find t
 hat there is a systematic procedure to exactly renormalize the two-body in
 teractions at every perturbative order\; this is found to be applicable to
  quantum critical as well as ground state properties within the Mott insul
 ating lobe.  Preliminary work on finite temperature effects in interacting
  hardcore bosons (XXZ-type spin models) will be briefly mentioned.\n\n//in
 dico.ictp.it/event/a1337/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1337/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "A scalable algorith
 m to explore the Gibbs energy landscape of genome-scale metabolic networks
 "
DTSTART;VALUE=DATE-TIME:20130219T103000Z
DTEND;VALUE=DATE-TIME:20130219T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1342@ictp.it
DESCRIPTION:The integration of various types of genomic data into predicti
 ve models of biological networks is one of the main challenges currently f
 aced by computational biology. Constraint-based models in particular play 
 a key role in the attempt to obtain a quantitative understanding of cellul
 ar metabolism at genome scale. In essence\, their goal is to frame the met
 abolic capabilities of an organism based on minimal assumptions that descr
 ibe the steady states of the underlying reaction network via suitable stoi
 chiometric constraints\, specifically mass balance and energy balance (i.e
 . thermodynamic feasibility). The implementation of these requirements to 
 generate viable configurations of reaction fluxes and/or to test given flu
 x profiles for thermodynamic feasibility can however prove to be computati
 onally intensive. We propose here a fast and scalable stoichiometry-based 
 method to explore the Gibbs energy landscape of a biochemical network at s
 teady state. The method is applied to the problem of reconstructing the Gi
 bbs energy landscape underlying metabolic activity in the human red blood 
 cell\, and to that of identifying and removing thermodynamically infeasibl
 e reaction cycles in the Escherichia coli metabolic network (iAF1260). In 
 the former case\, we produce consistent predictions for chemical potential
 s (or log-concentrations) of intracellular metabolites\; in the latter\, w
 e identify a restricted set of loops (23 in total) in the periplasmic and 
 cytoplasmic core as the origin of thermodynamic infeasibility in a large s
 ample of flux configurations generated randomly and compatibly with the pr
 ior information available on reaction reversibility.\n\n//indico.ictp.it/e
 vent/a1342/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1342/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "The iron su
 perconductors: Mott physics hides behind the orbitals"\n\n
DTSTART;VALUE=DATE-TIME:20130221T103000Z
DTEND;VALUE=DATE-TIME:20130221T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1344@ictp.it
DESCRIPTION:High-temperature superconductivity in the copper oxides is alm
 ost universally associated with strong electron-electron correlations\, an
 d the idea that superconductivity appear doping a Mott insulator.  The iro
 n-based superconductors do not seem to follow the same paradigm\, as the p
 arent compounds are not insulating despite their magnetic ordering.  Anoth
 er key difference is that\, while the cuprates can be described with a sin
 gle valence band\, in the iron materials it appears necessary to consider 
 all five iron d-orbitals.\nRe-examining the experimental data for the effe
 ctive mass\, we show that indeed the phase diagram of iron superconductors
  is controlled by a Mott insulating state which would occur in a material 
 with a very large hole-doping\, while the parent compound is not close to 
 a Mott state despite the commensurate filling.\nThe reason for this behavi
 or is a large Hund's coupling\, which decouples the orbitals turning the m
 ulti orbital bandstructure into a collection of single-band Hubbard models
 . This finding creates the strongest connection between cuprates and iron 
 superconductors. In both cases superconductivity appears around 20% doping
  of a Mott insulator.\nAs a matter of fact the different single-band model
 s have a different population (or doping) and therefore they have a differ
 ent effective mass\, which simply corresponds to the distance from the Mot
 t insulator. This also implies a strongly "orbital-selective" effective ma
 ss\, which reconciles contrasting evidences of correlations in these mater
 ials.\n\n//indico.ictp.it/event/a1344/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1344/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Finite volume matri
 x elements in the sine-Gordon model"\n
DTSTART;VALUE=DATE-TIME:20130226T100000Z
DTEND;VALUE=DATE-TIME:20130226T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1346@ictp.it
DESCRIPTION:I will discuss finite volume matrix elements of local operator
 s in integrable quantum field theories and present a conjecture relating f
 inite and infinite volume form factors in the most general setting\, i.e. 
 including the case of form factors containing disconnected pieces in the p
 resence of non-diagonal scattering.  Specializing to the sine-Gordon model
 \, finite volume multi-soliton form factors are compared to numerical data
  coming from a numerical renormalization group calculation in the truncate
 d conformal space.  I find excellent agreement between the two approaches\
 , thus verifying both bootstrap for multi-soliton form factors and the the
 ory linking finite and infinite volume matrix elements.  Evaluation of the
  nontrivial multi-soliton form factors is achieved by a newly developed re
 gularization scheme.\n\n//indico.ictp.it/event/a1346/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a1346/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter Physics: "The end 
 of the quantum spin ladder problem (almost)"
DTSTART;VALUE=DATE-TIME:20130227T153000Z
DTEND;VALUE=DATE-TIME:20130227T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1345@ictp.it
DESCRIPTION:For the past 25 years\, the Heisenberg S = 1/2 ladder remains 
 the most important model in quantum magnetism.  It combines the essence of
  quantum spin fluctuations with topological peculiarities of one dimension
 .  The vast amount of theoretical work performed over the years yielded a 
 comprehensive picture of spin correlations in this model\, and their evolu
 tion in applied magnetic fields.  Unfortunately\, good experimental realiz
 ations and sufficiently accurate numerical results remained elusive.  The 
 situation changed drastically in the past couple of years\, due to progres
 s in material synthesis\, neutron scattering instrumentation and algorithm
  development.  We are now close to claiming that the spectral and thermody
 namic properties of the quintessential J_rung-J_leg Heisenberg ladder mode
 l are completely understood at the quantitative level. Particularly striki
 ng are recent results on spin excitations in the strong-leg ladder materia
 l DIMPY\, obtained in the gapped spin liquid [1-3] and gapless Tomonaga-Lu
 ttinger spin liquid phases [3].  At the same time\, just slightly more com
 plex ladder systems\, those showing disorder [4]\, geometric frustration [
 5\,6] or a coupling to the crystal lattice [7]\, present new challenges th
 at we are beginning to tackle.\n\nReferences\n1.        T. Hong et al.\, P
 hys. Rev. Lett. 105\, 137207 (2010).\n2.        D. Schmidiger et al.\, Phy
 s. Rev. B 84\,144421 (2011)\n3.        D. Schmidiger et al.\, Phys. Rev. L
 ett. 108\, 167201 (2012).\n4.        T. Hong et al.\, Phys. Rev. B 81\, [R
 apid] 060410 (2010).\n5.        V. O. Garlea\, et al.\, Phys. Rev. Lett. 1
 00\, 037206 (2008).\n6.        V. O. Garlea\, et al.\, Phys. Rev. B 79\, [
 Rapid] 060404 (2009).\n7.        F. Schrettle\, et al.\, Phys. Rev. B [Rap
 id]-in press\, arXiv:1203.3127v1.\n\n//indico.ictp.it/event/a1345/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1345/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Resonant B
 ose-Fermi mixtures:  A T-matrix and Quantum Monte Carlo study"\n
DTSTART;VALUE=DATE-TIME:20130228T103000Z
DTEND;VALUE=DATE-TIME:20130228T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1350@ictp.it
DESCRIPTION:We develop the theoretical study of a novel physical system\, 
 in the context of ultracold gases.  We investigate the physical behavior o
 f a resonant Bose-Fermi mixture\, namely\, an ultracold gas made of both b
 osons and fermions\, with a strong attractive interaction between these tw
 o components.\nWe study homogeneous density and mass imbalanced mixtures f
 rom weak- to strong- coupling limit\, comparing the results obtained with 
 two different theoretical approaches\, a many-body diagrammatic approach (
 the T- matrix approximation) and Quantum Monte Carlo method.\nBy using man
 y-body diagrammatic methods we first obtain the finite-temperature phase d
 iagram and the thermodynamic properties of the system.  We observe the pre
 sence of a quantum phase transition from the condensed (superfluid) to the
  normal (molecular) phase.  Developing the zero-temperature limit of the s
 ame Green’s function formalism we study the effect of density and mass i
 mbalances for the Bose-Fermi mixture.  By using the corresponding retarded
  propagators we calculate the spectral weight functions and the dispersion
 s of bosons and fermions.\nWe apply for the first time the Quantum Monte C
 arlo method with Fixed-Node approximation to investigate resonant Bose-Fer
 mi mixture\, from weak to strong boson-fermion attraction.  Two different 
 nodal surfaces are used as trial wave functions in the two regimes.  We ob
 tain the equation of state of a density imbalanced mixture and we observe 
 the presence of the quantum phase transition through the crossing of the e
 nergies\, calculated with their respective trial wave functions.  A phase 
 diagram in the coupling and boson-fermion concentration variables is deriv
 ed and the occurrence of phase separation is discussed.  We compare Quantu
 m Monte Carlo results to T-matrix calculations\, finding an interesting ag
 reement between the results.\n\n//indico.ictp.it/event/a1350/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1350/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter seminar: "Structures of metallic
  nanoparticles and nanoalloys"
DTSTART;VALUE=DATE-TIME:20130228T143000Z
DTEND;VALUE=DATE-TIME:20130228T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1351@ictp.it
DESCRIPTION:The structures of metallic nanoparticles are searched for by a
  computational methodology combining global optimization searches within a
 n atomistic model and density-functional local relaxation. Different syste
 ms are considered\, from single-metal nanoparticles adsorbed on magnesium 
 oxide\, to free and supported nanoalloys.\nMetallic nanoparticles adsorbed
  on MgO are of great interest for applications in catalysis. Here we show 
 that a variety of different morphologies can be obtained depending on the 
 magnitude of the lattice mismatch and on the interaction strength with the
  substrate. We consider Au\, Ag and Ni clusters on MgO(100) and compare ou
 r results with the experimental findings.\nNanoalloys with core-shell arra
 ngement are of special interest in applications\, such as in optics\, cata
 lysis\, magnetism and biomedicine. Despite this wide interest\, the physic
 al factors stabilizing the structures of these nanoparticles are still unc
 lear to a great extent\, especially for what concerns the relationship bet
 ween geometric structure and chemical ordering.\nHere global-optimization 
 searches are performed in order to determine the most stable chemical orde
 ring patterns corresponding to the most important geometric structures\, f
 or a series of weakly miscible systems\, including AgCu\, AgNi\, AgCo andC
  AuCo. Our calculations show that\na) the overall geometric structure of t
 he nanoalloy and the shape and placement of its inner core are strictly co
 rrelated\; b) centered cores can be obtained in icosahedral nanoparticles 
 but not in crystalline or decahedral ones\, in which asymmetric quasi-Janu
 s morphologies form\;\nc) in icosahedral nanoparticles\, when the core exc
 eeds a critical size\, a new type of morphological instability develops\, 
 making the core asymmetric and extending it towards the nanoparticle\; d) 
 multi-center patterns can be obtained in large polyicosahedral nanoalloys.
 \nAnalogies and differences between the instability of the core in icosahe
 dral nanoalloys and the Stranski-Krastanov instability occurring in thin-f
 ilm growth are discussed. All these issues are crucial for designing strat
 egies to achieve effective coatings of the cores.\n\n//indico.ictp.it/even
 t/a1351/
LOCATION:SISSA\, Santorio Building\,  Room 131 (1st floor)
URL://indico.ictp.it/event/a1351/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Computing with anyo
 ns"
DTSTART;VALUE=DATE-TIME:20130305T103000Z
DTEND;VALUE=DATE-TIME:20130305T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1352@ictp.it
DESCRIPTION:2D physical systems with degenerate grounds states and excited
  particle states obeying exotic statistics ('anyons') provide a surprising
 ly effective and aesthetically appealing arena for performing quantum\ncom
 putation.  Topological quantum computation is a rapidly expanding research
  area focused on the physical realisation  of a quantum computer that is i
 ntrinsically fault-tolerant and decoherence free.  The theoretical backgro
 und needed for dealing with 'topological' systems and materials will be pr
 esented in an pedagogical way.\n\n//indico.ictp.it/event/a1352/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1352/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Utility and
  detection of work fluctuation theorems in many-body physics"\n\n
DTSTART;VALUE=DATE-TIME:20130307T103000Z
DTEND;VALUE=DATE-TIME:20130307T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1356@ictp.it
DESCRIPTION:The statistics of work done and associated fluctuation theorem
 s give a novel thermodynamic interpretation of dynamics in quantum systems
 . Here\, we apply the fluctuation theorems to a sudden "quench" of a quant
 um system of many interacting particles containing a critical point.  The 
 results highlight that the fluctuations of a dynamical quantum system prov
 ide a route understanding the emergence of thermodynamic irreversibility. 
 Furthermore I will show that the characteristic function of the work distr
 ibution for a non-equilibrium process can be extracted from Ramsey interfe
 rometry of a single probe qubit. Our scheme paves the way for the full cha
 racterisation of non-equilibrium processes in a variety of complex quantum
  systems\, ranging from atomic systems to NMR.\n\n//indico.ictp.it/event/a
 1356/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1356/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint  ICTP/SISSA Colloquium on Condensed Matter Physics: "Lithium
  ions in spinel (LiMn_2O_4\, LiV_2O_4) nanowire"\n
DTSTART;VALUE=DATE-TIME:20130308T103000Z
DTEND;VALUE=DATE-TIME:20130308T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1355@ictp.it
DESCRIPTION:Lithium ion transport attracts much interest because it is fun
 damental process at lithium ion battery electrodes\, particularly at nanow
 ire electrodes. To study irreversible transport process at charging–disc
 harging process directly at atomic scale\, we developed an aberration corr
 ected electron microscope which allows us to form an electron probe having
  a diameter of sub-50pm. The spherical electron wave emitting from the ele
 ctron probe scans the specimen surface was found for the first time to giv
 e structure image of individual lithium ions. In electrodes of spinel stru
 cture\, i.e.\, LiMn2O4\, dislocation of lithium ions from the tetrahedral 
 sites induces local structure change at octahedral sites\, which makes cha
 rging-discharging cycle of ion transport irreversible#). Structure change 
 is discussed in relation to the current-voltage relation of a mode LIB. At
  excess or deficient concentration of lithium ions\, spinel electrodes exh
 ibited local disorder. To characterize local disorder\, we devised a new m
 ethod which can allow us to find not only pair correlation but also higher
  order correlation of the local disorder. \n#)This work is supported by CR
 EST project\, “nanocycle at nano-in-macro interface”\n\n//indico.ictp.
 it/event/a1355/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1355/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Equilibrium and non
 equilibrium entanglement properties in Fermi gases/liquids"\n
DTSTART;VALUE=DATE-TIME:20130312T100000Z
DTEND;VALUE=DATE-TIME:20130312T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1360@ictp.it
DESCRIPTION:The equilibrium and nonequilibrium quantum evolution of extend
 ed observables and entanglement properties are discussed in systems of Fer
 mi gases/liquids of any dimension.  In particular I focus on the entanglem
 ent entropy of extended space regions at equilibrium and off-equilibrium d
 uring the expansion after the drop of a trapping potential\, which general
 ly shows multiplicative logarithmic corrections to the leading power-law b
 ehaviors\, analogously to the logarithmic corrections to the area law in l
 attice fermions.\n\n//indico.ictp.it/event/a1360/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a1360/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Pseudogap i
 n ultracold Fermi gases: Theory\, experiments\, and QMC simulations"\n\n
DTSTART;VALUE=DATE-TIME:20130314T103000Z
DTEND;VALUE=DATE-TIME:20130314T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1364@ictp.it
DESCRIPTION:The origin of the pseudogap is widely debated for  cuprate sup
 erconductors. The main controversy concerns whether superconductivity and 
 the pseudogap phase are competing with each other or are manifestations of
  the same phenomenon. In the latter case\, pairing fluctuations would exte
 nd above the critical temperature (Tc) the effects of the pairing gap belo
 w Tc [1].\nA contribution to settle this controversy can be obtained by ul
 tracold fermions\, which are free of the structural complications of cupra
 tes and where only pairing fluctuations are present above Tc. In these sys
 tems\, the inter-particle attraction can be varied by Fano-Feshbach resona
 nces as to amplify the effects of pairing fluctuations.\nIn this context\,
  wave-vector resolved radio frequency spectroscopy data for an ultracold t
 rapped Fermi gas are reported for several couplings at Tc\, and analyzed  
 by a pairing-fluctuation theory. We show that the non-Fermi-liquid behavio
 r associated with the presence of a pseudogap coexists with a robust remna
 nt Fermi surface over a wide coupling range\, which sets the boundary of t
 he  pseudogap phase [2\,3\,4].\nMoreover\, the properties of the pseudogap
  phase obtained within the t-matrix approach are compared with the outcome
 s of recent quantum Monte Carlo (QMC) ab initio simulations [5\,6].\nOnce 
 the pseudogap has been characterized in ultracold fermions\, we compare th
 e temperature dependence of the spectral intensity suppression obtained wi
 thin our theory with the one measured in cuprates by angular resolved phot
 oemission spectroscopy (ARPES) [7].\n\nReferences\n\n[1] A. Perali\, P. Pi
 eri\, G.C. Strinati\, and C. Castellani\, Phys. Rev. B 66\, 024510 (2002).
 \n[2] J.P. Gaebler\, J.T. Stewart\, T.E. Drake\, D.S. Jin\,  A. Perali\, P
 . Pieri\, and G. C. Strinati\, Nature Physics 6\, 569 (2010).\n[3] A. Pera
 li\, F. Palestini\, P. Pieri\, G.C. Strinati\,  J. T. Stewart\, J. P. Gaeb
 ler\, T. E. Drake\, and D. S. Jin\,  Phys. Rev. Lett. 106\, 060402 (2011).
 \n[4] F. Palestini\, A. Perali\, P. Pieri\, and G.C. Strinati\,  Phys. Rev
 . B 85\, 024517 (2012).\n[5] P. Magierski\, G. Wlazlowski and A. Bulgac\, 
 Phys. Rev. Lett. 107\, 145304 (2011).\n[6] G. Wlazlowski\, P. Magierski\, 
 J. E. Drut\, A. Bulgac\, and K. J. Roche\, Phys. Rev. Lett. 110\, 090401 (
 2013).\n[7] T. Kondo\, Y. Hamaya\, A. D. Palczewski\, T. Takeuchi\, J. S. 
 Wen\, Z. J. Xu\, G. Gu\, J. Schmalian & A. Kaminski\, Nature Physics 7\, 2
 1 (2011).\n\n//indico.ictp.it/event/a1364/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1364/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Non-equilibrium dyn
 amics in isolated quantum systems"\n
DTSTART;VALUE=DATE-TIME:20130319T103000Z
DTEND;VALUE=DATE-TIME:20130319T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1373@ictp.it
DESCRIPTION:Quantum many-body physics has traditionally been dominated by 
 detailed investigations of equilibrium properties and low-energy excitatio
 ns. In the last decade or so\, motivated by novel experimental possibiliti
 es such as cold atoms\, the study of quantum matter far from equilibrium h
 as emerged as an important and exciting new field.\nI will start with a se
 lection of new questions and phenomena that have appeared in the context o
 f non-equilibrium evolution in isolated systems.  I will end by focusing o
 n a specific example\, namely\, the dynamics of composite objects in latti
 ce systems. such as repulsively bound pairs\, triplets and clusters.\n\n//
 indico.ictp.it/event/a1373/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1373/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Information-theoretic vs
 . thermodynamic entropy production in autonomous sensory networks"\n\n
DTSTART;VALUE=DATE-TIME:20130320T140000Z
DTEND;VALUE=DATE-TIME:20130320T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1377@ictp.it
DESCRIPTION:For sensory networks\, we determine the rate with which they a
 cquire information about the changing external conditions. Comparing this 
 rate with the thermodynamic entropy production that quantifies the cost of
  maintaining the network\, we find that there is no universal bound restri
 cting the rate of obtaining information to be less than this thermodynamic
  cost. These results are obtained within a general bipartite model consist
 ing of a stochastically changing environment that affects the instantaneou
 s transition rates within the system. Moreover\, they  are illustrated \nw
 ith a simple four-states model motivated by cellular sensing. On the techn
 ical level\, we obtain an upper bound on the rate of mutual information an
 alytically and calculate  this rate with a numerical method that estimates
  the entropy of a time-series generated with a simulation.\n\n//indico.ict
 p.it/event/a1377/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1377/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Irreversibl
 e work\, large deviations\, critical Casimir effect\, and universality in 
 quantum quenches"\n
DTSTART;VALUE=DATE-TIME:20130321T103000Z
DTEND;VALUE=DATE-TIME:20130321T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1372@ictp.it
DESCRIPTION:Recent experimental progress in the physics of ultracold atomi
 c gases has revived the interest in the behavior of thermally isolated qua
 ntum statistical systems\, especially after sudden changes (quenches) of t
 heir control parameters.  Considering the quench as a thermodynamic transf
 ormation\, it is natural to focus on the irreversible work done on the sys
 tem\, which is characterized by a certain probability distribution.  By st
 udying its large deviations\, i.e.\, rare fluctuations of the work per uni
 t volume\, we establish a connection with the physics of a classical syste
 m confined in a film geometry.  If the system is quenched close to a (quan
 tum) critical point\, both the edge singularity and the large deviations o
 f the irreversible work acquire universal features dictated by the critica
 l Casimir effect in the corresponding classical system.  In systems of bos
 ons\, the statistics of the work may additionally display a transition whi
 ch is analogous to the equilibrium Bose-Einstein condensation.\n\n//indico
 .ictp.it/event/a1372/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1372/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "On the carr
 ier multiplication in graphene"\n
DTSTART;VALUE=DATE-TIME:20130328T090000Z
DTEND;VALUE=DATE-TIME:20130328T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1380@ictp.it
DESCRIPTION:We study relaxation of an excited electron in the conduction b
 and of intrinsic graphene at zero temperature due to production of interba
 nd electron-hole pairs by Coulomb interaction.  The electronic band curvat
 ure\, being anisotropic because of trigonal warping\, is shown to suppress
  relaxation for a range of directions of the initial electron momentum. Fo
 r other directions\, relaxation is allowed only if the curvature exceeds a
  finite critical value\; otherwise\, a non-decaying quasiparticle state is
  shown to exist.\n\n//indico.ictp.it/event/a1380/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1380/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar: "Infinitely disordered critical behaviour"
DTSTART;VALUE=DATE-TIME:20130328T103000Z
DTEND;VALUE=DATE-TIME:20130328T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1384@ictp.it
DESCRIPTION:Spatial inhomogeneities\, e.g. dislocations or impurities are 
 inevitable features of realistic systems. In condensed matter physics\, th
 e dynamics of disorder is usually slow compared to experimental time scale
 s\, thus inhomogeneities are well approximated by time-independent\, quenc
 hed disorder.  Although being a microscopic perturbation\, quenched disord
 er may dramatically change the large-scale critical behavior of the system
 . A paradigmatic example is the zero temperature quantum phase transition 
 of the quantum Ising model\, where the system exhibits exotic\, infinitely
  disordered critical behavior. Besides the quantum Ising model\, there is 
 a huge number of further interesting examples\, such as the random walk in
  1D\, the 1D Hubbard model\, the Mott metal-insulator transition in 2D\, l
 ocalization of a random polymer at an interface\, random exclusion process
 es and trap models\, driven lattice gases and reaction diffusion models\, 
 as well as a number of classical and quantum spin systems.  In the underst
 anding of the phenomena the strong disorder renormalization group (SDRG) m
 ethod plays a crucial role\, yielding exact analytical results in 1D. Unfo
 rtunately\, in higher dimensional systems the method is only numerically a
 pplicable.  In 2D this enabled to study only relatively small systems with
  a limited accuracy. In the experimentally important three dimensional cas
 e no quantitative results have been achieved.\nIn this talk I will give an
  overview about my analytical and numerical results concerning the SDRG me
 thod\, leading to the first quantitative results in 3 (and higher) dimensi
 ons. The obtained results are directly applicable also for the contact pro
 cess\, which is a simple model of infection spreading.\n\n//indico.ictp.it
 /event/a1384/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1384/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar on Statistical Physics: "Non-equilibrium statistic
 al mechanics: A growing frontier of 'pure and applied' theoretical physics
 "
DTSTART;VALUE=DATE-TIME:20130403T130000Z
DTEND;VALUE=DATE-TIME:20130403T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1387@ictp.it
DESCRIPTION:Founded over a century ago\, statistical mechanics (SM) for sy
 stems in thermal equilibrium has been so successful that\, nowadays\, it f
 orms part of our physics core curriculum.  On the other hand\, most of "re
 al life" phenomena occur under non-equilibrium conditions.\nUnfortunately\
 , statistical mechanics for such systems is far from being well establishe
 d. The goal of understanding complex collective behavior from simple micro
 scopic rules (of evolution\, say) remains elusive. As an example of the di
 fficulties we face\, consider predicting the existence of a tree from an a
 ppropriate collection of H\,C\,O\,N\,... atoms!\nOver the last two decades
 \, an increasing number of condensed matter theorists are devoting their e
 fforts to this frontier. After a brief summary of the crucial differences 
 between text-book equilibrium SM and non-equilibrium SM\, I will give a bi
 rd's-eye view of some key issues\, ranging from the "fundamental" to (a sm
 all set of) the "applied." The methods used also span a wide spectrum\, fr
 om "easy" computer simulations to sophisticated field theoretic techniques
 . These will be illustrated in the context of an overview of our work\, as
  well as a simple Ising model coupled to two thermal baths.\n\n//indico.ic
 tp.it/event/a1387/
LOCATION:SISSA\, Santorio Building\,  Room 5 (ground floor)
URL://indico.ictp.it/event/a1387/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Melting tra
 nsition of hard disks: New algorithms\, new insights "\n
DTSTART;VALUE=DATE-TIME:20130404T103000Z
DTEND;VALUE=DATE-TIME:20130404T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1385@ictp.it
DESCRIPTION:The hard-disk model has exerted outstanding influence on compu
 tational physics and statistical mechanics.  Decades ago\, hard disks were
  the first system to be studied by Markov-chain Monte Carlo methods and by
  molecular dynamics.  It was in hard disks\, through numerical simulations
 \, that a two-dimensional melting transition was first seen to occur even 
 though such systems cannot develop long-range crystalline order.  Analysis
  of the system was made difficult by the absence of adequate simulation me
 thods.\nIn recent years\, we  have developed a number of powerful Monte Ca
 rlo algorithms for hard disks and related systems. I will in particular sh
 ow how  the powerful event-chain Monte Carlo algorithm has allowed us to\n
 show that hard disks melt  with a first-order transition from the liquid t
 o the hexatic and a continuous transition from the hexatic to the solid. I
  will finish with discussions on the general theory of two-dimensional mel
 ting and on the generalizations of the event-chain algorithm.\n\n//indico.
 ictp.it/event/a1385/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1385/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Why do complex syst
 ems look critical"
DTSTART;VALUE=DATE-TIME:20130409T103000Z
DTEND;VALUE=DATE-TIME:20130409T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1390@ictp.it
DESCRIPTION:The study of complex systems is limited by the fact that only 
 few variables are accessible for modeling and sampling\, which are not nec
 essarily the most relevant ones. In addition\, empirical data typically un
 der sample the space of possible states.\nWe study a class of complex syst
 ems\, which are systems of many interacting degrees of freedom\, which are
  known only in part\, that optimize a given function. We show that the inf
 ormation that a sample contains on the behavior of the system is quantifie
 d by the entropy of the frequency with which different states occur. This 
 allows us to characterize the properties of maximally informative samples:
 \nIn the under-sampling regime\, the most informative frequency size distr
 ibutions have power law behavior and Zipf's law emerges at the crossover b
 etween the under sampled regime and the regime where the sample contains e
 nough statistics to make inference on the behavior of the system. These id
 eas are illustrated in some applications\, showing that they can be used t
 o identify relevant variables or to select most informative representation
 s of data\, e.g. in data clustering.\n\n//indico.ictp.it/event/a1390/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1390/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Difference 
 between ergodicity\, level statistics and localization transitions on the 
 Bethe lattice"
DTSTART;VALUE=DATE-TIME:20130411T104000Z
DTEND;VALUE=DATE-TIME:20130411T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1389@ictp.it
DESCRIPTION:Random Matrix Theory was initially developed to explain the ei
 gen-energy distribution of heavy nuclei. It has become clear by now that i
 ts domain of application is much broader and extends to very different fie
 lds such as number theory and quantum chaos\, just to cite a few. In parti
 cular\, it has been conjectured—and proved or verified in some special c
 ases—that quantum ergodic (or chaotic) systems are characterized by eige
 n-energies statistics in the same universality class of random matrices an
 d by eigen-functions that are delocalized over the configuration space. On
  the contrary\, non-ergodic quantum systems\, such as integrable models\, 
 are expected to display a Poisson statistics of energy levels and localize
 d wave-functions. Starting from Anderson’s pioneering papers\, similar p
 roperties have also been studied for electrons hopping in a disordered env
 ironment. Remarkably\, also in this case\, similar features of the energy-
 level statistics have been found. All that has lead to the conjecture that
  delocalization in configuration space\, ergodicity and level statistics a
 re intertwined properties. \nIn this talk we revisit the old problem of no
 n-interacting electrons hopping on a Bethe lattice with on-site disorder. 
 By using numerical simulations\, the cavity method and mapping to directed
  polymers in random media we unveil the existence of an intermediate phase
  in which wave-functions are delocalized but the energy-level statistics i
 s Poisson. This new phase\, in which the system is non-ergodic but delocal
 ized\, may play an important role in several fields from random matrix the
 ory to strongly interacting quantum disordered systems\, in particular it 
 could be related to the non-ergodic metallic phase conjectured to exist in
  the context of Many-Body Localization.\n\n//indico.ictp.it/event/a1389/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1389/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Thermodynamics of p
 rediction"
DTSTART;VALUE=DATE-TIME:20130416T100000Z
DTEND;VALUE=DATE-TIME:20130416T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1395@ictp.it
DESCRIPTION:I will discuss the fundamental equivalence between thermodynam
 ic inefficiency\, measured by dissipation\, and information processing ine
 fficiency. The dynamics of any system responding to a stochastic environme
 ntal signal can be interpreted as computing an implicit model of the drivi
 ng signal. The system’s state retains information about past environment
 al fluctuations\, and a fraction of this information is predictive of futu
 re fluctuations. The remaining nonpredictive information reflects model co
 mplexity that does not improve predictive power\, and thus represents the 
 inefficiency of the model. We find that instantaneous nonpredictive inform
 ation: 1) is proportional to the work dissipated due to environmental chan
 ge\; 2) provides a lower bound on the total dissipated work when summed ov
 er the length of a driving protocol\; 3) augments the lower bound on heat 
 generated due to information erasure (Landauer's principle). Our results h
 old far from thermodynamic equilibrium and are thus applicable to a wide r
 ange of systems\, including biomolecular machines\, and potential future n
 ano computing devices. These results highlight a profound connection betwe
 en the effective use of information and efficient thermodynamic operation:
  any system constructed to keep memory about its environment\, and to oper
 ate with maximal energetic efficiency\, has to be predictive. http://prl.a
 ps.org/abstract/PRL/v109/i12/e120604\n\n//indico.ictp.it/event/a1395/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a1395/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Applied Mathematics/Statistical Mechanics seminar
 : "Shocks in fragile matter"
DTSTART;VALUE=DATE-TIME:20130417T120000Z
DTEND;VALUE=DATE-TIME:20130417T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1391@ictp.it
DESCRIPTION:Non-linear sound is an extreme phenomenon typically observed i
 n solids after violent explosions. But granular media are different. Right
  when they unjam\, these fragile and disordered solids exhibit vanishing e
 lastic moduli and sound speed\, so that even tiny mechanical perturbations
  form supersonic shocks. Here\, we perform simulations in which two-dimens
 ional jammed granular packings are continuously compressed\, and demonstra
 te that the resulting excitations are strongly nonlinear shocks\, rather t
 han linear waves. We capture the full dependence of the shock speed on pre
 ssure and compression speed by a surprisingly simple analytical model. We 
 also treat shear shocks within a simplified viscoelastic model of nearly-i
 sostatic random networks comprised of harmonic springs. In this case\, anh
 armonicity does not originate locally from nonlinear interactions between 
 particles\, as in granular media\; instead\, it emerges from the global ar
 chitecture of the network. As a result\, the diverging width of the shear 
 shocks bears a nonlinear signature of the diverging isostatic length assoc
 iated with the loss of rigidity in these floppy networks.\n\n//indico.ictp
 .it/event/a1391/
LOCATION:SISSA\, Santorio Building\,  Room 4 (ground floor)
URL://indico.ictp.it/event/a1391/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Mass-algebr
 as and the quantum numbers of topological defects in Dirac systems"\n
DTSTART;VALUE=DATE-TIME:20130418T103000Z
DTEND;VALUE=DATE-TIME:20130418T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a1397@ictp.it
DESCRIPTION:I will discuss the Dirac quasiparticles in the lattice systems
  of electrons\, exemplified by graphene\, in the presence of topological d
 efects of the allowed order parameters.  These orders appear as possible m
 ass terms in the Dirac equation\, and their topological defects have been 
 known to carry non-trivial quantum numbers such as fractionalized charge s
 ince the work of Jackiw and Rebby in 1976.  In the talk I will discuss the
 ir additional internal degree of freedom: irrespectively of the nature of 
 orders that support the defect\, an extra mass-order-parameter spontaneous
 ly emerges in the defect's core.  The determination of the quantum state o
 f the topological defect in Dirac systems turns out to be an interesting p
 roblem in the (real) representation theory of Clifford algebras\; with the
  Clifford algebra C(2\,5) playing a fundamental role in graphene\, for exa
 mple.  Ultimately\, the particle-hole symmetry restricts the defects to al
 ways carry the quantum numbers of a single effective "isospin" - 1/2\, qui
 te independently of the values of their electric charge or true spin.  Exa
 mples of this new degree of freedom in graphene and other Dirac-like syste
 ms\, such as graphene bilayers or d-wave superconductors will be given.\n\
 n//indico.ictp.it/event/a1397/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a1397/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Landau - Zener inte
 rferometry with double and triple quantum dots"\n
DTSTART;VALUE=DATE-TIME:20130423T103000Z
DTEND;VALUE=DATE-TIME:20130423T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13100@ictp.it
DESCRIPTION:In this talk I will review general non-adiabatic theories of t
 wo- and three- level crossings subject to fast and slow Gaussian noise.\nT
 he applications to recent experiments on Landau - Zener interferometry in 
 double/triple quantum dots and superconducting qubits will be discussed.\n
 \n//indico.ictp.it/event/a13100/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13100/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Conduction 
 properties of ultracold Fermions"
DTSTART;VALUE=DATE-TIME:20130425T103000Z
DTEND;VALUE=DATE-TIME:20130425T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13101@ictp.it
DESCRIPTION:We experimentally study the transport process of ultracold fer
 mionic atoms through a mesoscopic\, quasi two-dimensional channel connecti
 ng macroscopic reservoirs.  By observing the current response to a bias ap
 plied between the reservoirs\, we directly access the resistance of the ch
 annel in a manner analogous to a solid state conduction measurement.  The 
 resistance is further controlled by a gate potential reducing the atomic d
 ensity in the channel\, like in a field effect transistor.  In this setup\
 , we study the flow of a strongly interacting Fermi gas\, and observe a st
 riking drop of resistance with increasing density in the channel\, as expe
 cted at the onset of superfluidity.  The resistance is compared to that of
  an ideal Fermi gas in the same geometry\, which shows an order of magnitu
 de larger resistance\, originating from the contact resistance between the
  channel and the reservoirs.  We extended this investigation to disordered
  superfluids and provide evidences for a disorder-induced breakdown of sup
 erfluidity.\n\n//indico.ictp.it/event/a13101/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13101/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Localizatio
 n of bound states in  quasi-periodic optical lattices"\n
DTSTART;VALUE=DATE-TIME:20130502T103000Z
DTEND;VALUE=DATE-TIME:20130502T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13105@ictp.it
DESCRIPTION:We discuss the formation of bound states made of two interacti
 ng atoms moving in a one dimensional (1D) quasi-periodic optical lattice.\
 nThe underlying hamiltonian is the Aubry-André model with additional on-s
 ite interactions.\nWe derive the quantum phase diagram for localization of
  both attractively and repulsively bound pairs. We calculate the pair bind
 ing energy and show analytically that its behavior as a function of the in
 teraction strength depends crucially on the nature -extended\, multifracta
 l\, localized- of the single-particle atomic states. Experimental implicat
 ions of our results are discussed.\n\nRef: G. Dufour\, G. Orso\, Phys. Rev
 . Lett. 109\, 155306 (2012)\n\n//indico.ictp.it/event/a13105/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13105/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on  Statistical Physics: "Empirical portfolio sel
 ection"
DTSTART;VALUE=DATE-TIME:20130507T133000Z
DTEND;VALUE=DATE-TIME:20130507T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13106@ictp.it
DESCRIPTION:In this seminar we survey  discrete time\, multi period\, sequ
 ential investment strategies for financial markets.\nUnder memoryless  ass
 umption on the underlying process generating the asset prices the Best Con
 stantly Rebalanced Portfolio is studied\, called log-optimal portfolio\, w
 hich achieves the maximal asymptotic average growth rate.  For generalized
  dynamic portfolio selection\, when asset prices are generated by a statio
 nary and ergodic process\, universally consistent empirical methods are sh
 own\, using current principles of nonparametric regression estimation and 
 machine learning algorithms.\nThe empirical performance of the methods are
  illustrated for NYSE data.\n\n//indico.ictp.it/event/a13106/
LOCATION:ICTP Adriatico Guest House Denardo Lecture Hall
URL://indico.ictp.it/event/a13106/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: “Active fluids: Fr
 om Liquid Crystals to Living Systems”\n
DTSTART;VALUE=DATE-TIME:20130507T100000Z
DTEND;VALUE=DATE-TIME:20130507T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13125@ictp.it
DESCRIPTION:Colonies of motile microorganisms\, the cytoskeleton and its c
 omponents\,  cells and tissues have much in common with soft condensed mat
 ter systems \n(i.e. liquid crystals\, amphiphiles\, colloids etc.)\, but a
 lso exhibit behaviors that do not appear in inanimate matter and that are 
 crucial for biological functions. These unique properties arise when the c
 onstituent  particles are active: they consume energy from internal and ex
 ternal sources and dissipate it by moving through the medium they inhabit.
   In this talk I will give a brief introduction to the notion of "active  
 matter" and present some recent results on the hydrodynamics of active  ne
 matics suspensions in two dimensions.\n\n//indico.ictp.it/event/a13125/
LOCATION:SISSA\, Santorio Building room 128 (1st floor) 
URL://indico.ictp.it/event/a13125/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: “Magnetotr
 ansport in Non-magnetic Inhomogeneous Materials”\n
DTSTART;VALUE=DATE-TIME:20130509T103000Z
DTEND;VALUE=DATE-TIME:20130509T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13126@ictp.it
DESCRIPTION:A substantial magnetodielectric effect is usually an indicatio
 n of coupled magnetic and elastic order\, such as is found in the multifer
 roics. However\, here I will show that magnetism is not necessary to produ
 ce either a magnetoresistance or a magnetocapacitance when the material is
  inhomogeneous. From exact calculations and numerical simulations of metal
 -dielectric composites\, I find a characteristic dielectric resonance that
  sensitively depends on magnetic field. I will discuss how this behaviour 
 has already been observed experimentally in some materials.\n\n//indico.ic
 tp.it/event/a13126/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13126/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter Physics: "Correlat
 ed electron calculations with polynomial scaling"\n
DTSTART;VALUE=DATE-TIME:20130515T150000Z
DTEND;VALUE=DATE-TIME:20130515T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13124@ictp.it
DESCRIPTION:Due to its simplicity and numerical efficiency\, density funct
 ional theory (DFT) is the most popular approach for calculating the electr
 onic structure of large molecules and materials. Nevertheless\, the accura
 cy of DFT is not always satisfactory and the search for improved approxima
 tions that avoid self-interaction and capture strong electron correlations
  faces severe difficulties. In this talk I will present an alternative app
 roach in which the one- and two-particle density matrices needed to comput
 e the ground-state energy\, are explicit functionals of the natural spin o
 rbital states and their joint occupation probabilities. The scheme is para
 meter-free and not affected by self-interaction error. In its simplest for
 mulation\, restricted to the seniority zero sector of the many-particle Hi
 lbert space\, it has the same scaling of Hartree-Fock theory. Yet\, it des
 cribes strong correlations as demonstrated by calculating the dissociation
  energy curves of diatomic molecules and linear chains of hydrogen atoms. 
 Improved approximations that retain polynomial cost but are not limited to
  seniority zero will be also discussed.\n\n//indico.ictp.it/event/a13124/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13124/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Functional 
 renormalization group in and out of equilibrium"\n\n
DTSTART;VALUE=DATE-TIME:20130516T124500Z
DTEND;VALUE=DATE-TIME:20130516T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13127@ictp.it
DESCRIPTION:For quantum systems specified by a given density matrix at ini
 tial time\, a generating functional for real-time correlation functions ca
 n be written down using the Schwinger-Keldysh closed time path. This can b
 e used to construct a nonequilibrium functional renormalization group alon
 g similar lines as for Euclidean field theories in thermal equilibrium.  I
 mportant differences include the absence of a fluctuation-dissipation rela
 tion for general out-of-equilibrium situations.  The nonequilibrium renorm
 alization group takes on a particularly simple form at a fixed point\, whe
 re the corresponding scale-invariant system becomes independent of the det
 ails of the initial density matrix.  This can be used to derive a hierarch
 y of fixed point solutions with increasing complexity from vacuum and ther
 mal equilibrium to nonequilibrium.  The application to dynamic critical ph
 enomena and the phenomenon of turbulence in quantum field theory will be d
 iscussed.\n\n//indico.ictp.it/event/a13127/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13127/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Ultra-cold atoms as
  universal quantum simulators: Symmetry locked superfluid phases"
DTSTART;VALUE=DATE-TIME:20130521T103000Z
DTEND;VALUE=DATE-TIME:20130521T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13137@ictp.it
DESCRIPTION:I review the concept of ultra-cold atoms as universal quantum 
 simulators for quantum many body systems\, focusing on motivations\, main 
 targets and open problems. As a realistic example I then describe a setup 
 of ultracold fermionic mixtures in optical lattices able to host superflui
 d phases with symmetry obtained by locking independent invariance groups o
 f the normal state. Due to their peculiar symmetry\, these phases can also
  show exotic soliton structures\, as vortices with semi-integer flux and g
 apless non-Abelian Goldstone modes localized on them. The origin of the no
 n-abelianity\, the braiding properties\, the mechanism and the consequence
 s of fractionality for such vortices are discussed. The scenario proposed 
 displays remarkable similarities to what arises in ultra-dense QCD matter\
 , as in the core of some neutron stars. A discussion about the experimenta
 l detection of locked phases and non-abelian fractional vortices is as wel
 l provided.\n\n//indico.ictp.it/event/a13137/
LOCATION:ICTP Adriatico Guest House Giambiagi Lecture Hall
URL://indico.ictp.it/event/a13137/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter Physics: "First pr
 inciples simultations of materials and processes in photocatalysis"
DTSTART;VALUE=DATE-TIME:20130522T150000Z
DTEND;VALUE=DATE-TIME:20130522T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13136@ictp.it
DESCRIPTION:In this talk I will discuss applications of first principles e
 lectronic structure calculations and molecular dynamics simulations to und
 erstand materials properties and reaction mechanisms relevant to photocaly
 sis and energy applications. Examples will focus on the surface properties
  of TiO2\, a widely used photocatalyst capable of splitting water in O2 + 
 H2\, and  hydrogen  production from water by the active site of an enzyme 
 of hydrogen-producing bacteria\, the di-iron hydrogenase\, linked to a pyr
 ite electrode.\n\n//indico.ictp.it/event/a13136/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor) 
URL://indico.ictp.it/event/a13136/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: " The summer of our discontent - the banking scan
 dals of 2012 "\n
DTSTART;VALUE=DATE-TIME:20130523T160000Z
DTEND;VALUE=DATE-TIME:20130523T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13138@ictp.it
DESCRIPTION:In the summer of 2012\, a series of scandals broke out around 
 the largest\, systemically most important banks of the world.  In most cas
 es\, the roots and practice of misdeeds  (Libor  rigging\, violations of s
 anctions\, money laundering\, mis-selling of fake products\, tax fraud\, i
 nsider trading\, etc.) go back several years. Regulators imposed record fi
 nes on the banks\, in a few cases started criminal procedures against the 
 most incriminated players\, and a deluge of lawsuits was launched. The reg
 ulators raised questions about the responsibility of rating agencies and c
 onsultants\, but in some cases the scandals shed a dubious light on the re
 gulators themselves\, as well as on the British and US governments\, and a
 lso the American Congress.\nThe talk reviews some of the elements of this 
 series of scandals\, and tries to draw some conclusions for regulation.\n\
 n//indico.ictp.it/event/a13138/
LOCATION:ICTP Adriatico Guest House Giambiagi Lecture Hall
URL://indico.ictp.it/event/a13138/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Scrutinizing the co
 smological constant problem and a proposal"
DTSTART;VALUE=DATE-TIME:20130523T103000Z
DTEND;VALUE=DATE-TIME:20130523T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13139@ictp.it
DESCRIPTION:We suggest a new perspective on the Cosmological Constant Prob
 lem by scrutinizing its standard formulation. In classical and quantum mec
 hanics without gravity\, there is no definition of the zero point of energ
 y. Furthermore\, the Casimir effect only measures how the vacuum energy ch
 anges as one varies a geometric modulus. This leads us to propose that the
  physical vacuum energy in a Friedman-Lemaitre-Robertson-Walker expanding 
 universe only depends on the time variation of the scale factor $a(t)$. Eq
 uivalently\, requiring that empty Minkowski space is gravitationally stabl
 e is a principle that fixes the ambiguity in the zero point energy. On the
  other hand\, if there is a meaningful bare cosmological constant\, this p
 rescription should be viewed as a fine-tuning. We describe two different c
 hoices of vacuum\, one of which is consistent with the current universe co
 nsisting only of matter and vacuum energy. The resulting vacuum energy den
 sity is constant in time and approximately kc2 H02\, where kc is a momentu
 m cut-off and H0 is the current Hubble constant\; for a cut-off close to t
 he Planck scale\, values of vacuum energy density in agreement with astrop
 hysical measurements are obtained. Another choice of vacuum is more releva
 nt to the early universe consisting of only radiation and vacuum energy\, 
 and we suggest it as a possible model of inflation.\n\n//indico.ictp.it/ev
 ent/a13139/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a13139/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar: "Transition metal dopants in other metal cluster
 s: From shell model to magnetic superatoms and beyond"\n
DTSTART;VALUE=DATE-TIME:20130528T130000Z
DTEND;VALUE=DATE-TIME:20130528T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13141@ictp.it
DESCRIPTION:I will start with the idea of electronic shell models as propo
 sed for simple metal clusters\, and show how this leads to the idea of sup
 eratoms. I will then present our work on 3d transition metal (TM) doped al
 kali and alkaline earth clusters and show how the ideas of electronic shel
 l models play out in these. This will lead us to magnetic superatoms. I wi
 ll also point out how a subtle interplay of crystal field effect and excha
 nge coupling leads to enhanced stability for certain TM-alkaline earth clu
 sters\, and leads to new magnetic superatoms in this series. Time permitti
 ng\, I will present some of our recent results on TM-doped aluminum cluste
 rs and will argue that aromaticity rather than shell models plays a role i
 n these clusters.\n\n//indico.ictp.it/event/a13141/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13141/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Boltzmann pseudodyn
 amics for spin glasses and liquids"\n
DTSTART;VALUE=DATE-TIME:20130528T103000Z
DTEND;VALUE=DATE-TIME:20130528T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13146@ictp.it
DESCRIPTION:More than 10 years ago\, it was realized that mean field glass
 y dynamics\, with the emergence of aging and effective temperatures\, can 
 be understood as quasi-equilibrium exploration of configuration space. The
  formalization of this notion\, only recently proposed\, defines a Markov 
 chain where short times are coarse grained\, and subsequent configurations
  are chosen according to a constrained Boltzmann distribution.\n\nIn mean 
 field spin glasses\, this pseudodynamic rule admits\, in the long time lim
 it\, a description leading to glassy solutions identical to the ones corre
 sponding to real (Langevin) dynamics. The treatment of the pseudodynamics 
 through replicas unveils a longly suspected relation between replicas and 
 the supersymmetry of the Langevin equation.\n\nThe application of the form
 alism to liquids avoids the difficulties related to short time conservatio
 n laws\, and allows to use equilibrium approximation schemes of liquid the
 ory to study long time dynamics. The scheme is applied to a closure scheme
  of hierarchical equations recently proposed by Szamel and to liquids in t
 he hypernetted chain (HNC) approximation. It is shown that the former case
  leads to the standard Mode Coupling Theory (MCT) equations of Gœtze\, th
 us giving an interpretation of it. The second case also gives rise to MCT-
 like equations\, but in a framework where\, differently from MCT that requ
 ires the input of equilibrium structure factors\, static equilibrium and d
 ynamical quantities are computed in a unified consistent framework.\n\nRef
 s. SF and G. Parisi\, JSTAT P02003 (2013)\, SF\, G. Parisi and P. Urbani\,
  arXiv:1212.4291\n\n//indico.ictp.it/event/a13146/
LOCATION:ICTP Adriatico Guest House Giambiagi Lecture Hall
URL://indico.ictp.it/event/a13146/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Hall-drag a
 nd magneto-drag in graphene via kinetic equation approach"\n\n
DTSTART;VALUE=DATE-TIME:20130530T103000Z
DTEND;VALUE=DATE-TIME:20130530T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13145@ictp.it
DESCRIPTION:Recently\, Coulomb drag measurements have been performed in gr
 aphene\, usually in the presence of magnetic fields as well.  In this work
  we calculate the magneto-drag and the Hall-drag resistivity at finite tem
 perature for two graphene monolayers by solving the quantum kinetic equati
 on.  The presented theory is valid in the hydrodynamic regime\, which is d
 ominated by inelastic scattering. The microscopic formulation supports a p
 henomenological Drude-like picture which for large concentrations equals t
 he usual Drude form\, and for small concentration an effective two-band-Dr
 ude equation.  Our theory allows for a qualitative description for arbitra
 ry chemical potentials.  An emphasis is put on the Hall-drag which is abse
 nt when derived from the standard Drude equation.  We show that the Hall-d
 rag vanishes along the line of opposite carrier concentration in the layer
 s\, but we also identify non trivial concentrations at which the Hall-drag
  vanishes.\n\n//indico.ictp.it/event/a13145/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13145/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: Momentum transfer in
  non-equilibrium steady states
DTSTART;VALUE=DATE-TIME:20130604T103000Z
DTEND;VALUE=DATE-TIME:20130604T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13316@ictp.it
DESCRIPTION://indico.ictp.it/event/a13316/
LOCATION:ICTP Adriatico Guest House Giambiagi Lecture Hall
URL://indico.ictp.it/event/a13316/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Condensed Matter Seminar:\nDuality Near the Super
 conductor-Insulator Transition
DTSTART;VALUE=DATE-TIME:20130605T150000Z
DTEND;VALUE=DATE-TIME:20130605T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13148@ictp.it
DESCRIPTION:Careful transport measurements near the superconductor-insulat
 or transition in amorphous indium-oxide reveal a symmetry relating states 
 in the insulator to those in the superconducting phase. I will discuss thi
 s symmetry and its consequences\, and show that it is violated upon enteri
 ng\nthe strong insulator at low temperatures.\n\n//indico.ictp.it/event/a1
 3148/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13148/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and Strong Electron Correlations: New Paths to
  Unconventional Topological Superconductivity
DTSTART;VALUE=DATE-TIME:20130606T103000Z
DTEND;VALUE=DATE-TIME:20130606T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13149@ictp.it
DESCRIPTION:We report on our recent progress regarding classes of material
 s which exhibit chiral triplet and singlet superconductivity\, where topol
 ogically nontrivial \npairing phenomena can emerge. Specifically\, motivat
 ed by recent experimental advances\, we show that graphene doped to the va
 n Hove regime can give rise to a plethora of interesting ordering instabil
 ities such as spin density wave and superconductivity. As a function of sy
 stem\nparameters such as doping and range of Coulomb \ninteraction\, we ex
 plain which instability is favored by the system\, and analyze the effect 
 of long-range interactions on superconductivity giving rise to a competiti
 on\nbetween singlet d+id and triplet f wave. We further \nreport on our in
 vestigations of Cobaltate superconductors where we believe the experimenta
 l evidence can be reconciled by an anisotropic d+id superconducting gap. \
 nWe also outline our work in progress for other compounds such as strontiu
 m ruthenate and SrPtAs which we believe\nare promising to stabilize such i
 nteresting topological superconducting states of matter.\n\n//indico.ictp.
 it/event/a13149/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13149/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar.  Many-body Localizat
 ion. Building a Theory of a Quantum Glass
DTSTART;VALUE=DATE-TIME:20130611T103000Z
DTEND;VALUE=DATE-TIME:20130611T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13155@ictp.it
DESCRIPTION://indico.ictp.it/event/a13155/
LOCATION:ICTP Adriatico Guest House Giambiagi Lecture Hall
URL://indico.ictp.it/event/a13155/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and Strong Electron Correlations. "Induced Sup
 erconductivity in Graphene"
DTSTART;VALUE=DATE-TIME:20130613T103000Z
DTEND;VALUE=DATE-TIME:20130613T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13158@ictp.it
DESCRIPTION:I will present theoretical results on induced\nsuperconductivi
 ty in graphene covered by low \ndensity of  small (sub-micron) islands of 
 \nsuperconducting metal.\nThen I present some of recently obtained \nexper
 imental data on graphene with tin islands\nand discuss the comparison betw
 een the data and\nthe theory.\n\n//indico.ictp.it/event/a13158/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13158/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Condensed Matter Seminar. Quantum Spin Squeezing
DTSTART;VALUE=DATE-TIME:20130620T103000Z
DTEND;VALUE=DATE-TIME:20130620T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13159@ictp.it
DESCRIPTION:Abstract:  I will give a brief introduction about quantum sque
 ezing\, and discuss properties of some definitions of the spin squeezing p
 arameter. Then I will show some recent results of our group for the time d
 ependent squeezing parameter in different systems: Cavity QED\, spin chain
 s\, and quantum corrals.\n\n//indico.ictp.it/event/a13159/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13159/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Mechanics Seminar. "Optimal Design fo
 r Quantum Transport Across a Disordered System"
DTSTART;VALUE=DATE-TIME:20130625T103000Z
DTEND;VALUE=DATE-TIME:20130625T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13161@ictp.it
DESCRIPTION:For more than 50 years we have known that photosynthetic syste
 ms harvest solar energy with almost unit quantum efficiency. However\, rec
 ent experimental evidence of quantum coherence during the excitonic energy
  transport in photosynthetic organisms challenges our understanding of thi
 s fundamental biological function. Currently\, and despite numerous effort
 s\, the causal connection between coherence and efficiency is still a matt
 er of debate. We show\, through extensive simulations of quantum coherent 
 transport on networks\, that three dimensional structures characterized by
  centro-symmetric Hamiltonians are statistically more efficient than rando
 m arrangements. Moreover\, we theoretical derive a general mechanism for h
 ighly efficient quantum transport through nite\, disordered 3D networks. I
 t relies on the interplay of disorder with centro-symmetry and a dominant 
 doublet spectral structure\, and can be controlled by proper tuning of onl
 y coarse-grained quantities. Photosynthetic light harvesting complexes are
  discussed as potential biological incarnations of this design principle.\
 n\n//indico.ictp.it/event/a13161/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13161/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Associate CMSP seminar: "Quantum Ising dynamics and Majorana-like 
 edge modes in the Rabi lattice model”
DTSTART;VALUE=DATE-TIME:20130626T150000Z
DTEND;VALUE=DATE-TIME:20130626T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13170@ictp.it
DESCRIPTION:We present a case for the realization of Majorana-like edge mo
 des\, through the quantum Ising (QI) dynamics\, in the Rabi lattice. A Rab
 i lattice is an array of the Rabi quantum cavities where each cavity has a
  two-level atom (or a spin-1/2) coupled via dipole interaction to a single
  photon (bosonic) mode\, and the inter-cavity coupling causes photon hoppi
 ng. We show that the Rabi lattice model rigorously tends to the QI model i
 n the limit of strong atom-photon coupling. This QI dynamics drives the pa
 ra- to ferro-electric quantum phase transition in the Rabi lattice\, and a
 lso guarantees two Majorana-like edge modes in the ordered phase on an ope
 n chain. We identify an observable signature of these modes\, and check th
 eir stability against the detrimental perturbations such as a stray electr
 ic field. We find that the QI Majorana modes are not as fragile as one bel
 ieved\, despite no topological protection.\n\n//indico.ictp.it/event/a1317
 0/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13170/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Disordered 
 bosons"
DTSTART;VALUE=DATE-TIME:20130718T103000Z
DTEND;VALUE=DATE-TIME:20130718T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13180@ictp.it
DESCRIPTION:Abstract\n \nI will discuss the global phase diagram of the di
 sordered Bose-Hubbard model in all dimensions controlled by the theorem of
  inclusions. In 1D\, in the regime when strong disorder is more relevant t
 han field quantization the superfluid--to--Bose-glass criticality is prece
 ded by the prolonged logarithmically slow classical-field renormalization 
 flow of the superfluid stiffness at mesoscopic scales. With the system com
 pressibility remaining constant\, the quantum nature of the system manifes
 ts itself only in the renormalization of dilute weak links. The transition
  point is still controlled by the proliferation of the instanton--anti-ins
 tanton pairs when the Luttinger liquid parameter equals 3/2\, in accordanc
 e with the universal quantum scenario.\n\n//indico.ictp.it/event/a13180/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13180/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and Strong Electron Correlations: "Localizatio
 n at the Edge of 2D Topological Insulator by Kondo Impurities with Random 
 Anisotropies"
DTSTART;VALUE=DATE-TIME:20130801T103000Z
DTEND;VALUE=DATE-TIME:20130801T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13272@ictp.it
DESCRIPTION:We consider chiral electrons moving along the 1D helical edge 
 of a 2D topological insulator and interacting with a disordered chain of K
 ondo impurities. Assuming the electron-spin couplings of random anisotropi
 es\, we map this system to the problem of the pinning of the charge densit
 y wave by the disordered potential. This mapping proves that arbitrary wea
 k anisotropic disorder in coupling of chiral electrons with spin impuritie
 s leads to the Anderson localization of the helical edge states [1].\n\n[1
 ] B.L. Altshuler\, I.L. Aleiner\, and V.I. Yudson\, preprint arXiv: 1306.2
 626\n\n//indico.ictp.it/event/a13272/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13272/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "An analytic
 ally tractable model of bad metals"
DTSTART;VALUE=DATE-TIME:20130815T103000Z
DTEND;VALUE=DATE-TIME:20130815T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13275@ictp.it
DESCRIPTION:Abstract\n\nWe discuss a model Kondo-type Hamiltonian represen
 ting an analytically tractable version of the model used by Yin et.al.\, P
 hys. Rev. B 86\, 2399 (2012) to explain the non-Fermi liquid behavior of i
 ron chalcogenides and ruthenates in an intermediate energy range. We consi
 der a regime where a complete screening of the local degrees of freedom pr
 oceeds in two stages described by two characteristic energy scales T_K^orb
  >> E_0. The first scale marks a screening of the orbital degrees of freed
 om and the second one marks a crossover to the regime with coherent propag
 ation of quasiparticles. We present analytical results for the specific he
 at and magnetic susceptibility at T \n\n//indico.ictp.it/event/a13275/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13275/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Condensed Matter Seminar: Mesoscopic conductance fluctuat
 ions at a helical edge of a topological insulator
DTSTART;VALUE=DATE-TIME:20130816T093000Z
DTEND;VALUE=DATE-TIME:20130816T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13276@ictp.it
DESCRIPTION:Abstract\nElastic backscattering of electrons moving along the
  helical edge is prohibited by time-reversal symmetry (TRS).  \nWe demonst
 rate\, however\, that an ensemble of magnetic impurities may cause TRS-pre
 serving quasi-elastic backscattering\, resulting in interference effects i
 n the conductance. The characteristic energy transferred in a backscatteri
 ng event is suppressed due to the RKKY interaction of localized spins (the
  suppression is exponential in the total number of magnetic impurities). W
 e predict the statistics of conductance fluctuations to differ from those 
 in the conventional case of a one-dimensional system with quenched disorde
 r. \n\n\nReference:\nV.Cheianov\, L.Glazman\, Phys. Rev. Lett.\, 110\, 206
 803. (2013)\n\n//indico.ictp.it/event/a13276/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a13276/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Associate's CMSP Seminar: "Ab-initio study of H-doping and Oxygen 
 vacancy in TiO2"
DTSTART;VALUE=DATE-TIME:20130827T100000Z
DTEND;VALUE=DATE-TIME:20130827T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13284@ictp.it
DESCRIPTION:Abstract:\nTitanium dioxide (TiO2¬) is a widely used material
  with many industrial applications. Because of the photocatalytic activity
  and environmental compatibility\, it has tremendous potential application
 s in solar cells\, dye industries\, electronic devices\, sensors and trans
 formers. Density functional - pseudopotential calculations were performed 
 to study the effect of hydrogen doping in bulk\, and also H-doping and oxy
 gen vacancy on electronic structure and stability of (001) surface of TiO2
  in the anatase phase. In the framework of ab-initio atomistic thermodynam
 ic\, we argue that the anatase TiO2 prefers a defected oxygen layer termin
 ation in the (001) direction. The obtained electronic structures indicate 
 that deep hydrogen doping in this stable termination creates a mid-gap sta
 te about 0.52 eV below the conduction band and hence decreases the band ga
 p of the system. This phenomenon may explain the enhanced photocatalytic a
 ctivity of the anatase TiO2 (001) surface after hydrogenation.\n\n//indico
 .ictp.it/event/a13284/
LOCATION:ICTP Adriatico Guest House Giambiagi Lecture Hall
URL://indico.ictp.it/event/a13284/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Associate's CMSP Seminar: "Insulator-AF and Pseudogap states joini
 ng into a  QPT beneath the superconducting “dome” from a model CuO pla
 nes in La2CuPO4"
DTSTART;VALUE=DATE-TIME:20130827T103000Z
DTEND;VALUE=DATE-TIME:20130827T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13285@ictp.it
DESCRIPTION:Abstract:\nThe effect of  hole doping on the Tight-Binding (TB
 ) model of the Cu-O planes in the La2CuO4 constructed in previous works is
  investigated here. Firstly\, it is pointed out that the model employed co
 nstitutes a generalization of the Hubbard one for the same system. Thus\, 
 the former predictions of the insulator gap\, antiferromagnetic (AF) chara
 cter and the existence of a paramagnetic-pseudogap (PPG) state at half-fil
 ling\, become natural ones to be expected from this more general picture. 
 The effect of hole doping on the antiferromagnetic-insulator state (AFI) a
 nd the paramagnetic-pseudogap one at half-filling\, is investigated here a
 t T = 0 K. The results predict the occurrence of a quantum phase transitio
 n (QPT) from the antiferromagnetic- insulator state at low doping to a par
 amagnetic-metallic state (PM) at higher hole densities. Therefore\, a clea
 r description of the hidden QPT laying beneath the “dome” in high crit
 ical temperature (HTc) superconducting materials is found. At low doping\,
  the systems prefers the AFI state\, and at the critical value of the dopi
 ng density dc = 0.2\, the energy of a metallic state starts becoming lower
 . The evolution with small doping values of the band spectrum of the AFI s
 tate\, shows that the holes tend to become localized at the middle of the 
 sides of the reduced Brillouin zone (BZ). Then\, when passes through the c
 ritical value\, the holes of the AFI state move to become situated at the 
 corners of the same reduced BZ\, showing in this way a structural change a
 t the phase transition point. It suggests that the Kramers degeneration in
  combination with the spin-spatial entangled nature of the hole states\, c
 an lead to a new kind of pair interaction between two holes. The binding e
 nergy value is estimated as a function of the screening.\n\n//indico.ictp.
 it/event/a13285/
LOCATION:ICTP Adriatico Guest House Giambiagi Lecture Hall
URL://indico.ictp.it/event/a13285/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Probing com
 plexity in aqueous systems"\n
DTSTART;VALUE=DATE-TIME:20131010T103000Z
DTEND;VALUE=DATE-TIME:20131010T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13310@ictp.it
DESCRIPTION:Water is one of the most ubiquitous substances in the universe
 .  Despite long study from both experimental and theoretical approaches\, 
 phenomena associated with liquid water and its coupling to other systems c
 ontinues to be a source of rather rich and interesting physics.  In this t
 alk\, I will discuss how computational studies play an important role in p
 robing both the structure and dynamics of water in different environments.
   I will motivate the discussion by briefly talking about water near the v
 icinity of proteins and the coupling between protein and water motions.  I
  will then move onto some more recent work on trying to understand water a
 s a hydrogen bond network and its subsequent role on processes like proton
  transfer in liquid water and anomalous water diffusion around ions like C
 sI and NaCl.  I will also briefly touch on the role of nuclear quantum eff
 ects in altering the structural and electronic properties of water and its
  constituent ions.\n\n//indico.ictp.it/event/a13310/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a13310/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Superfluid-
 insulator transition and the phase dynamics of two-species bosons with spi
 n-orbit coupling"\n
DTSTART;VALUE=DATE-TIME:20131016T150000Z
DTEND;VALUE=DATE-TIME:20131016T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13317@ictp.it
DESCRIPTION:We begin with a pedagogical introduction to the Physics of the
  Mott Insulator to Superfluid transition (MI-SF)and its recent realization
  in cold-atomic system.  Then we elaborate on such MI-SF transition in sys
 tems with two species of ultra-cold bosonic atoms in a two-dimensional squ
 are optical lattice with nearest- neighbor hopping amplitude t and a spin-
 orbit coupling k_SO.  We  chart out the phase diagram for the MI-SF transi
 tion using both a strong-coupling expansion and Gutzwiller mean-field theo
 ry. The momentum distribution near the MI-SF transition is shown to give p
 recursor peaks. We analyze the critical theory of the transition revealing
  the presence of unconventional quantum critical points at t/k_SO=0\, whic
 h are accompanied by the emergence of an additional gapless mode in the cr
 itical region. The Gutzwiller mean-field theory  shows the existence of a 
 twisted superfluid phase. We study the distribution of phases and the magn
 itude of the SF order parameter as a function of t and k_SO. We also study
  the collective modes and the dynamics of the phases in the semi-classical
  approach.\n\n//indico.ictp.it/event/a13317/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13317/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Quantum quench of t
 he trap frequency in the harmonic Calogero model"
DTSTART;VALUE=DATE-TIME:20131022T100000Z
DTEND;VALUE=DATE-TIME:20131022T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13320@ictp.it
DESCRIPTION:We consider a quantum quench of the trap frequency in a system
  of bosons interacting through an inverse-square potential and confined in
  a harmonic trap (the harmonic Calogero model). We determine exactly the i
 nitial state in terms of the post-quench eigenstates and derive the time e
 volution of simple physical observables. Since this model possesses an inf
 inite set of integrals of motion (IoM) that allow its exact solution\, a g
 eneralised Gibbs ensemble (GGE)\, i.e. a statistical ensemble that takes i
 nto account the conservation of all IoM\, can be proposed in order to desc
 ribe the values of local physical observables long after the quench. Even 
 though\, due to the presence of the trap\, physical observables do not exh
 ibit equilibration but periodic evolution\, such a GGE may still describe 
 correctly their time averaged values. We check this analytically for the l
 ocal boson density and find that the GGE conjecture is indeed valid\, in t
 he thermodynamic limit.\n\n//indico.ictp.it/event/a13320/
LOCATION:SISSA\, Santorio Building\,  Room 5  (Ground floor)
URL://indico.ictp.it/event/a13320/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Chemical Physics: "Charge and exciton transfer
  coupling in molecular materials"\n
DTSTART;VALUE=DATE-TIME:20131023T153000Z
DTEND;VALUE=DATE-TIME:20131023T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13321@ictp.it
DESCRIPTION:In modeling electronic and optical properties of molecular mat
 erials it is of fundamental interest to estimate charge and exciton transf
 er couplings between molecular sites. A short review of some quantum chemi
 cal based approaches to evaluate such couplings will be presented\, focusi
 ng especially on triplet exciton transfer as example.\n\n//indico.ictp.it/
 event/a13321/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13321/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations\n"Quantum dyn
 amics and topological phases of light in circuit-QED"
DTSTART;VALUE=DATE-TIME:20131024T103000Z
DTEND;VALUE=DATE-TIME:20131024T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13322@ictp.it
DESCRIPTION:Systems in cavity or circuit QED (Quantum Electrodynamics) are
  extensively studied in the context of quantum information and quantum com
 puting. In addition\, studying the non-equilibrium dynamics of photons in 
 these open quantum systems is a challenging theoretical question. Studying
  “versatile lattice versions of these systems”  open new doors to quan
 tum simulation\, similar to ultra-cold atoms in optical lattices. In this 
 Talk\, we review our recent theoretical progress regarding (i) the develop
 ment of methods to address the dynamics of driven and dissipative light-ma
 tter systems beyond the weak-coupling limit and (ii) the realization of to
 pological phases of light in superconducting QED-circuit arrays through sy
 nthetic gauge fields. Effects of disorder will be studied. We also comment
  on the current experimental status in circuit QED systems.\n\n//indico.ic
 tp.it/event/a13322/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13322/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Quench dynamics in 
 interacting field-theories in one-dimension"\n
DTSTART;VALUE=DATE-TIME:20131028T130000Z
DTEND;VALUE=DATE-TIME:20131028T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13338@ictp.it
DESCRIPTION:Due to experiments in cold-atomic gases\, the study of quantum
  quenches has become an active topic of research.  While many rigorous res
 ults exist for exactly solvable "free" theories\, not much is known about 
 the effect of non-linearities\, especially at long times and for systems i
 n the thermodynamic limit\, where numerical studies are challenging.  In t
 his talk\, in order to highlight the main questions\, I will first present
  results for a quench in an exactly solvable theory\, namely the Luttinger
  model. I will then present results for the effect of various non-linearit
 ies such as a commensurate periodic potential and a local back-scattering 
 potential.\nI will show that the dynamics following a quench can be quite 
 complex by being characterized by three regimes. One is a short time pertu
 rbatively accessible regime which depends on microscopic parameters\, the 
 second is an intermediate time prethermalized regime where inelastic effec
 ts are weak and correlation functions show universal scaling behavior whic
 h is quantified by a nonequilibrium generalization of the Callan-Symanzik 
 equations. The third is a long time regime where inelastic effects become 
 important. For the case of the commensurate periodic potential\, I will sh
 ow that these inelastic effects cause the system to eventually thermalize\
 , where the thermalization time depends in a non-monotonic way on the quen
 ch amplitude.\n\n//indico.ictp.it/event/a13338/
LOCATION: SISSA\, Santorio Building\,  Room 129 (1st Floor)
URL://indico.ictp.it/event/a13338/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Statistical Physics: "Statistical mechanics of
  multiplex networks"
DTSTART;VALUE=DATE-TIME:20131031T150000Z
DTEND;VALUE=DATE-TIME:20131031T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13336@ictp.it
DESCRIPTION:A large variety of complex systems\, from the brain to the wea
 ther networks and complex infrastructures\, are formed by several networks
  that coexist\, interact and coevolve forming a “network of networks”.
  Modeling such multilayer structures and characterizing  the rich interpla
 y between their structure and their dynamical behavior is crucial in order
  to understand and predict complex phenomena. In this talk I will present 
 recent works on statistical mechanics of  multiplex networks. Multiplex ne
 tworks are  formed by N nodes linked in different layers by different netw
 orks. I will present models that generate multiplexes with different types
  of correlations between the layers\, and characterize new percolation phe
 nomena on multiplex networks\, showing first order phase transitions\,   b
 istability or a complex phase diagram with tricriticals points and higher 
 order critical points.\n\n//indico.ictp.it/event/a13336/
LOCATION:ICTP Leonardo da Vinci Building Euler Lecture Hall
URL://indico.ictp.it/event/a13336/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Non-thermal
  fixed points: Universality\, topology and turbulence in Bose systems"\n
DTSTART;VALUE=DATE-TIME:20131031T093000Z
DTEND;VALUE=DATE-TIME:20131031T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13339@ictp.it
DESCRIPTION:Among the wealth of possible non-equilibrium many-body configu
 rations most interesting candidates are those which show universal behavio
 r.  New\, non-thermal fixed points are proposed\, leading beyond standard 
 equilibrium critical points.  A selection of phenomena in ultracold Bose g
 ases\, characterized by specific power-laws in space and time\, and univer
 sal time evolution will be presented.  These are\, for generic cases\, rel
 ated to the presence and turbulent dynamics of (quasi-)topological defects
  in the Bose field\, which are manifestly far from equilibrium.  Examples 
 how to reach these critical points which will be discussed include interac
 tion quenches and rapid evaporative cooling.  Our results confirm non-pert
 urbative quantum field theoretical predictions and establish a new link be
 tween kinetic wave turbulence and topological excitations of superfluids. 
  They open a path to explore a new class of universal far-from-equilibrium
  dynamics well accessible in ultracold gas experiments.  These phenomena a
 re of importance far beyond the realm of cold gases and allow a view on ne
 w classifications of universal far-from-equilibrium physics.\n\n//indico.i
 ctp.it/event/a13339/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13339/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Statistics of obser
 vables and universal behaviour in quantum quenches and \ndynamical phase t
 ransitions"\n
DTSTART;VALUE=DATE-TIME:20131105T103000Z
DTEND;VALUE=DATE-TIME:20131105T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13344@ictp.it
DESCRIPTION:The study of the dynamics of thermally isolated many-body syst
 ems offers a unique opportunity to address the role of universality in non
 equilibrium quantum phenomena. In this talk I will discuss recent results 
 concerning the statistics of the work and of other observables in spin cha
 ins and bosonic systems out of equilibrium. I will show that the statistic
 s of the work at low energies for spin chains (or bosonic systems) subject
  to a generic local or global variation of the transverse field is indepen
 dent on the detail of the protocol\, an example of universal behaviour bot
 h in time and space. I will similarly show that the statistics of excitati
 ons can be used to discuss universality and detect efficiently dynamical p
 hase transitions.\n\n//indico.ictp.it/event/a13344/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13344/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter Physics: "The SU(N
 ) Heisenberg model of quantum permutations in condensed matter and cold at
 oms"
DTSTART;VALUE=DATE-TIME:20131106T150000Z
DTEND;VALUE=DATE-TIME:20131106T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13343@ictp.it
DESCRIPTION:In this talk\, I will review the recent results we have obtain
 ed on the SU(N) Heisenberg model of quantum permutations\, which describes
  the low-energy properties of a number of Mott insulating phases in conden
 sed matter physics (spin-1 antiferromagnets with biquadratic interaction\,
  symmetric spin-orbital model) and cold atoms (ultracold ferminionic alkal
 ine rare-earths in optical lattices). In 1D\, where Quantum Monte Carlo si
 mulations can be performed\, we have calculated the correlations as a func
 tion of the entropy per site\, with the conclusion that the entropy below 
 which characteristic features show up increases with N and reaches experim
 entally accessible values already for N=4. \nIn 2D\, using a variety of an
 alytical and numerical approaches\, in particular flavour-wave theory and 
 a tensor-network algorithm\, we have shown that the nature of the ground s
 tate depends crucially on the value of N and on the topology of the lattic
 e\, including long-range color order for SU(3) on the triangular and squar
 e lattices\, spontaneous dimerization for SU(4) on the square lattice\, an
 d an algebraic quantum liquid for SU(4) on the honeycomb lattice. Experime
 ntal implications for condensed matter systems and cold atoms will be brie
 fly discussed.\n\n//indico.ictp.it/event/a13343/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13343/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Fractional 
 topological insulators: A progress report"\n\n
DTSTART;VALUE=DATE-TIME:20131114T100000Z
DTEND;VALUE=DATE-TIME:20131114T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13353@ictp.it
DESCRIPTION:I will review the progress our group has made on the study of 
 topological insulators in the last year\, with an emphasis on some algebra
 ic and geometric results.\n\n//indico.ictp.it/event/a13353/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13353/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Anderson model on t
 he Bethe lattice\, new results on an old problem"\n
DTSTART;VALUE=DATE-TIME:20131119T103000Z
DTEND;VALUE=DATE-TIME:20131119T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13357@ictp.it
DESCRIPTION:I will discuss recent developments for the Anderson model on t
 he Bethe lattice. In particular I will present evidence in favour of a non
 -ergodic\, extended phase before the Anderson transition sets in.\n\n//ind
 ico.ictp.it/event/a13357/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13357/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Chemical Physics: "Nanoscale structure\, surfa
 ces and vacancies in sustainable energy materials: Interplay between exper
 imental and ab-initio approaches"
DTSTART;VALUE=DATE-TIME:20131120T153000Z
DTEND;VALUE=DATE-TIME:20131120T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13355@ictp.it
DESCRIPTION:In this presentation\, our recent studies on future generation
  thin film solar cells and hydrogen energy materials will be highlighted. 
 The presence of di-vacancies in hydrogenated amorphous silicon (a-Si:H) wa
 s observed by a set of complementary techniques. These defects play an imp
 ortant role in the instability of a-Si:H layers against light-soaking (Sta
 ebler-Wronski effect). Further\, colloidal PbSe nanoparticles were investi
 gated by positron annihilation spectroscopies and ab-initio calculations\,
  shedding light on their surface composition and electronic structure. Fin
 ally\, recent studies on the impact of nanoscale particle size\, surface e
 nergies and the presence of vacancies on hydrogen storage materials and hy
 drogen sensors are discussed.\n\n//indico.ictp.it/event/a13355/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13355/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Quantum flu
 ids of light"\n
DTSTART;VALUE=DATE-TIME:20131121T103000Z
DTEND;VALUE=DATE-TIME:20131121T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13356@ictp.it
DESCRIPTION:A few years after the first observation of Bose-Einstein conde
 nsation\, quantum gases of photons in suitably designed photonic microstru
 ctures are establishing themselves as flexible and powerful platforms for 
 the study of many-body physics in a completely novel context.\nIn this tal
 k\, I will start by reviewing the first experiments that have demonstrated
  superfluid hydrodynamics effects in dilute photon fluids.\nWhen a localiz
 ed defect is inserted in the flow\, a wide range of behaviors have been ob
 served depending on the flow speed\, from superfluid flow to super-sonic M
 ach cones\, to the nucleation of topological excitations such as solitons 
 and vortices.\nI will then proceed with the presentation of more recent wo
 rk on synthetical gauge fields for photons and\, more generally\, geometri
 cal and topological effects in quantum fluids of light in the presence of 
 periodic trapping potentials with different geometries.\nPerspectives towa
 rds the generation of strongly correlated photon gases in the presence of 
 strong optical nonlinearities will be finally sketched\, with a special at
 tention to quantum Hall liquids of light and the detection of their exotic
  quasi-particle excitations.\n\n//indico.ictp.it/event/a13356/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13356/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Algebraic approach 
 to descendant form factors: Macdonald polynomials and null vectors"
DTSTART;VALUE=DATE-TIME:20131126T100000Z
DTEND;VALUE=DATE-TIME:20131126T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13361@ictp.it
DESCRIPTION:We give a short review of recent results (obtained together wi
 th M. Lashkevich) on descendant form factors in sinh-Gordon and sine-Gordo
 n models. We demonstrate that in algebraic approach one can find the equat
 ions between the form factors of scaling fields which are analogous to nul
 l vector equations of the correspondent CFT. In free field approach to CFT
  the null vectors are related with Jack polynomials. We show that for pert
 urbed massive case the story is very similar but null vector descendants a
 re related with the Macdonald polynomials with the special parameters q=-t
  and |q|=1. We briefly discuss the relation with the Deformed Virasoro Alg
 ebra null vectors as well as some applications of the construction to deri
 ving higher spins equations of motion and form factors of fields satisfyin
 g a resonance condition.\n\n//indico.ictp.it/event/a13361/
LOCATION:SISSA\, Santorio Building\,  Room 128 (1st Floor)
URL://indico.ictp.it/event/a13361/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Angular momentum bl
 ockade in nanoscale high-Tc superconducting grains"\n
DTSTART;VALUE=DATE-TIME:20131203T100000Z
DTEND;VALUE=DATE-TIME:20131203T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13365@ictp.it
DESCRIPTION:The arise of an angular momentum blockade in small d-wave supe
 rconducting grains embedded in external magnetic field is envisaged. It's 
 shown how abrupt changes in the angular momentum state of the condensate (
 "angular momentum blockade") occur as a result of variation of the externa
 l field. The effect represents a direct analogy with the Coulomb blockade.
  A Ginzburg–Landau description is adopted to illustrate how a magnetic f
 ield induces a deviation from the d-wave symmetry\, which is described by 
 a (d_{x2−y2} + id{xy})-order parameter. The volume magnetic susceptibili
 ty will be described as a function of the magnetic field\, and correspondi
 ng magnetization jumps\, that should be experimentally observable in super
 conducting grains\, are predicted to occur near equispaced critical values
  of the field.\n\n//indico.ictp.it/event/a13365/
LOCATION:SISSA\, Santorio Building\,  Room 5 (Ground floor)
URL://indico.ictp.it/event/a13365/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations:\n"Moiré min
 ibands in van der Waals heterostructures of graphene with hexagonal crysta
 ls"\n
DTSTART;VALUE=DATE-TIME:20131205T103000Z
DTEND;VALUE=DATE-TIME:20131205T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13366@ictp.it
DESCRIPTION:The technological development of graphene has generated new hi
 gh-quality systems offer access to the earlier inaccessible extremes of qu
 antum physics. When graphene is placed on an atomically flat substrate wit
 h hexagonal lattice with a close lattice constant\, such as boron nitride 
 (hBN)\, and their crystalline axes are aligned\, a long-wavelength perfect
 ly periodic moiré pattern forms for electrons in graphene. In this talk\,
  various regimes of possible moiré minibands at zero magnetic field [Phys
 . Rev. B 87\, 245408 (2013)\; Phys. Rev. B 88\, 205418\; Phys. Rev. B 88\,
  155415 (2013)] and strong magnetic field [Nature 497\, 594 (2013)\, arXiv
 :1310.8578] will be discussed. Experimentally available magnetic fields ar
 e enough to provide flux Phi through the moiré superlattice cell comparab
 le to the magnetic flux quantum Phi_0 and reach the regime of fractal Hofs
 tadter spectra. As a result\, a single device can offer a multiplicity of 
 two-dimensional electron systems\, realised at rational flux values  Phi= 
 Phi_0\, = Phi_0/2\, 2= Phi_0/3\, etc.\, each with its own intricate topolo
 gical properties\, including quantum Hall effect physics related to the ef
 fective Landau levels emerging from these magnetic minibands at the nearby
  range of magnetic fields.\n\n//indico.ictp.it/event/a13366/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13366/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Bringing quantum th
 ermodynamics to the laboratory"\n
DTSTART;VALUE=DATE-TIME:20131210T103000Z
DTEND;VALUE=DATE-TIME:20131210T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13370@ictp.it
DESCRIPTION:Research on the out-of-equilibrium dynamics of quantum systems
  has so far produced important statements on the thermodynamics of small s
 ystems undergoing quantum mechanical evolutions.  Key examples are provide
 d by the Crooks and Jarzynski relations: taking into account fluctuations 
 in non-equilibrium dynamics\, such relations connect equilibrium propertie
 s of thermodynamical relevance with explicit non-equilibrium features.  Al
 though the experimental verification of such fundamental relations in the 
 classical domain has encountered some success\, their quantum mechanical v
 ersion requires the assessment of the statistics of work performed by or o
 nto an evolving quantum system\, a step that has so far encountered consid
 erable difficulties in its implementation due to the practical difficulty 
 to perform reliable projective measurements of instantaneous energy states
 .  In this talk I will outline a proposal [1] based on quantum phase estim
 ation to extract quantum work statistics without the need to resort to pro
 jective measurements.  In addition I shall discuss an experimental collabo
 ration which has successfully implemented the proposal in an NMR setting [
 2]. I will also comment on some future extensions and directions on the th
 eoretical side.\n\n[1]  R. Dorner\, S.R. Clark\, L. Heaney\, R. Fazio\, J.
  Goold\, and V. Vedral. Phys. Rev. Lett. 110 230601 (2013)\n\n[2]  T. Bata
 lhão\, A.M. Souza\, L. Mazzola\, R. Auccaise\, I.S. Oliveira\, J. Goold\,
  G. De Chiara\, M. Paternostro\, R.M. Serra. arXiv.org:quant-ph/1308.3241v
 1 (2013)\n\n//indico.ictp.it/event/a13370/
LOCATION:ICTP Leonardo da Vinci Building Luigi Stasi Seminar Room
URL://indico.ictp.it/event/a13370/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Functional renormal
 ization group and a compactly supported smooth function"\n
DTSTART;VALUE=DATE-TIME:20131218T130000Z
DTEND;VALUE=DATE-TIME:20131218T190000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a13373@ictp.it
DESCRIPTION:Functional renormalization group (RG) method is suitable to pe
 rform renormalization non-perturbatively. However\, the approximated RG eq
 uations depend on the choice of the so called regulator function.  Thus\, 
 optimisation is required in order to increase the predicting power of the 
 functional RG approach.  As a result of a general optimisation strategy\, 
 the Litim-Pawlowski method\, one obtains Litim's regulator which is one of
  the most frequently used regulator function.  It is a continuous function
  with a compact support but non-differentiable\, hence\, it confronts to t
 he gradient expansion.  Another optimization scenario is based on the Prin
 ciple of Minimal Sensitivity which can be used at any order of the gradien
 t expansion but regulators cannot be compared to each other.  In my talk I
  show how a compactly supported smooth regulator which reduces to all majo
 r types of regulator functions in appropriate limits can solve these probl
 ems.\n\n//indico.ictp.it/event/a13373/
LOCATION:SISSA\, Santorio Building\,  Room 5 (Ground floor)
URL://indico.ictp.it/event/a13373/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Finite temperature 
 correlations in the 1D Lieb-Liniger Bose gas"\n
DTSTART;VALUE=DATE-TIME:20140114T103000Z
DTEND;VALUE=DATE-TIME:20140114T170000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14100@ictp.it
DESCRIPTION:We address the problem of calculating finite-temperature respo
 nse functions of an experimentally relevant low-dimensional strongly-corre
 lated system: the integrable 1D Bose gas with repulsive δ-function intera
 ction (Lieb-Liniger model). Focusing on the dynamical density-density func
 tion\, we present a Bethe Ansatz-based method allowing for its accurate ev
 aluation in finite but large systems\, over broad ranges of momenta\, freq
 uencies\, temperatures and interaction parameters which are difficult to a
 ccess using other methods. This allows us to quantify the reshaping of the
  zero temperature critical behavior by thermal fluctuations\, in experimen
 tally accessible regimes.\n\n//indico.ictp.it/event/a14100/
LOCATION:ICTP
URL://indico.ictp.it/event/a14100/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Colloquium on Condensed Matter Physics: "Kinks an
 d failure in isostatic networks"
DTSTART;VALUE=DATE-TIME:20140115T150000Z
DTEND;VALUE=DATE-TIME:20140115T170000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14101@ictp.it
DESCRIPTION:A minimal model for studying the mechanical properties of amor
 phous solids is a disordered elastic network of point masses connected by 
 springs. At a critical (isostatic) value of its mean connectivity\, such a
  network undergoes a rigidity transition signaled by vanishing elastic mod
 uli and corresponding sound speed(s). We first investigate analytically an
 d numerically the linear and non-linear visco-elastic response of these ne
 arly isostatic networks by probing how shear fronts propagate through them
 . \nOur approach\, that we tentatively label shear front rheology\, provid
 es an alternative route to standard oscillatory rheology. In the linear re
 gime\, we observe at late times a diffusive broadening of the fronts contr
 olled by an effective shear viscosity that diverges at the critical point.
  No matter how small the microscopic coefficient of dissipation\, strongly
  disordered networks behave as if they were over-damped because energy is 
 irreversibly leaked into diverging non-affine fluctuations. Close to the t
 ransition\, the regime of linear response becomes vanishingly small: the t
 iniest shear strains generate strongly non-linear shear shock waves. The i
 nherent non-linearities trigger an energy cascade from low to high frequen
 cy components that keep the network away from attaining the quasi-static l
 imit. This mechanism\, reminiscent of acoustic turbulence\, causes a super
 -diffusive broadening of the shock width. \nFinally\, we show that the mec
 hanism of failure of such networks\, consists of meandering cracks whose w
 idth diverges at the transition. Thus\, upon approaching the critical poin
 t\, we can effectively zoom inside the fracture process zone.\n\n//indico.
 ictp.it/event/a14101/
LOCATION:ICTP
URL://indico.ictp.it/event/a14101/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "A functional RG equ
 ation for the c-function"
DTSTART;VALUE=DATE-TIME:20140121T100000Z
DTEND;VALUE=DATE-TIME:20140121T170000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14111@ictp.it
DESCRIPTION:After showing how to prove the integrated c-theorem within the
  functional RG framework based on the effective average action\, we derive
  an exact RG flow equation for Zamolodchikov's c-function in two dimension
 s by relating it to the flow of the effective average action. In order to 
 obtain a non-trivial flow for the c-function\, we will need to understand 
 the general form of the effective average action away from criticality\, w
 here nonlocal invariants\, with beta functions as coefficients\, must be i
 ncluded in the ansatz to be consistent. We then apply our construction to 
 several examples: exact results\, local potential approximation and loop e
 xpansion. In each case we construct the relative approximate c-function an
 d find it to be consistent with Zamolodchikov's c-theorem. Finally\, we pr
 esent a relation between the c-function and the (matter induced) beta func
 tion of Newton's constant\, allowing us to use heat kernel techniques to c
 ompute the RG running of the c-function.\n\narXiv: 1312.7097\n\n//indico.i
 ctp.it/event/a14111/
LOCATION:SISSA\, Santorio Building\,  Room 005 (Ground floor)
URL://indico.ictp.it/event/a14111/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Old and New Results
  on the Three Dimensional Ising Model"
DTSTART;VALUE=DATE-TIME:20140211T103000Z
DTEND;VALUE=DATE-TIME:20140211T170000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14134@ictp.it
DESCRIPTION:We discuss a few old results on the spectrum of the 3d Ising m
 odel and on the behaviour of fluid interfaces in the low temperature phase
  of the model which strongly disagree with the predictions of standard per
 turbative calculations. Performing a duality transformation (i.e. mapping 
 the 3d Ising model into a Z_2 gauge theory) we show that these apparently 
 puzzling results are signatures of an underlying effective string descript
 ion of the $Z_2$ gauge model. We then discuss a few recent advances which 
 drastically changed our understanding of these effective string theories a
 nd allow to precisely fit both the interface free energy and the low tempe
 rature spectrum of the Ising model.\n\n//indico.ictp.it/event/a14134/
LOCATION:ICTP
URL://indico.ictp.it/event/a14134/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Chemical Physics: "Non-radiative deactivation 
 mechanisms of electronically excited phenylalanine in model peptides"\n
DTSTART;VALUE=DATE-TIME:20140212T150000Z
DTEND;VALUE=DATE-TIME:20140212T170000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14135@ictp.it
DESCRIPTION:Studies of ultrafast non-radiative deactivation (NRD) mechanis
 ms of electronically excited states of small model peptide systems in gas 
 phase\, such as N-acetylphenylalaninylamide (NAPA)\, can provide key insig
 hts into the rich photochemistry of proteins\, especially the mechanisms r
 esponsible for their photostability. We focus on elucidating the NRD pathw
 ays of the vibrationless ππ* excited state in three NAPA conformers (βL
 (a)\, γL(g+) and γL(g–)) and their conformer dependent excited state l
 ifetime (70\, 1.5 and 35 ns\, respectively) as observed experimentally.1 P
 otential NRD pathways were obtained from non-adiabatic molecular dynamics 
 simulations based on modified Tully’s fewest switch algorithm and on-the
 -fly construction of potential energy surfaces and non-adiabatic couplings
  using time dependent density functional theory.2 Two mechanisms exhibitin
 g excitation transfer from the phenyl ππ* excited state to nπ* excited 
 states located on each amide group were further refined for all three conf
 ormers. This includes the computation of the energy barriers and conical i
 ntersection geometries on the coupled cluster (CC2) level of theory for th
 e two mechanisms. By comparing the sizes of the vibrational zero point ene
 rgy accessible part of the corresponding conical intersection seams\, as w
 ell as the effects of methyl substitution on the primary amino group\, we 
 were able to pinpoint the specific mechanism responsible for the fast NRD 
 processes in the NAPA conformers. In a broader sense\, we disclose the str
 uctural motifs/motions that control the relaxation dynamics in peptides an
 d hence contribute to preventing their irreversible photochemical damage.3
  \n\n1. M. Mališ\, Y. Loquais\, E. Gloaguen\, H. S. Biswal\, F. Piuzzi\, 
 B. Tardivel\, V. Brenner\, M. Broquier\, C. Jouvet\, M. Mons\, N. Došlić
 \, I. Ljubić J. Am. Chem. Soc. 134 (2012) 20340 \n2. R. Mitrić\, U. Wern
 er\, V. Bonačić-Kouteck. J. Chem. Phys. 129 (2008) 164118 \n3. M. Mališ
 \, Y. Loquais\, E. Gloaguen\, C. Jouvet\, V. Brenner\, M. Mons\, I. Ljubi
 ć\, N. Došlić Phys. Chem. Chem. Phys. 16 (2014) 2285\n\n//indico.ictp.i
 t/event/a14135/
LOCATION:ICTP
URL://indico.ictp.it/event/a14135/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Many particle-physi
 cs in one dimension: Correlations and dynamics"
DTSTART;VALUE=DATE-TIME:20140219T133000Z
DTEND;VALUE=DATE-TIME:20140219T170000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14140@ictp.it
DESCRIPTION:Abstract:\nThis seminar aims to give an introduction to the ph
 ysics of strongly\ncorrelated fermions and bosons in one-dimension.\nI wil
 l start from the description of the Tomonaga-Luttinger-Liquid (TLL)\nwhich
  has been the cornerstone of our understanding of the properties of\none d
 imensional systems. This universal set of properties plays in one\ndimensi
 on\, the same role than Fermi liquid plays for the higher\ndimensional met
 als. I will give an overview of some of the experimental\ntests that were 
 made to probe such TLL physics. In particular I will\ndetail some of the r
 ecent experiments that were made in spin systems and\nwhich provided remar
 kable quantitative tests of the TLL physics. Than I\nwill focus on bosons 
 in one-dimension and  discuss their properties and\nthe effects of various
  perturbations on the Tomonaga-Luttinger liquid\nstate\, as well as extens
 ions to multicomponent and out of equilibrium\nsituations.\nThese extensio
 ns are specially targeted for the experimental realizations\nthat have bee
 n provided by cold atomic gases in optical lattices.\n\n//indico.ictp.it/e
 vent/a14140/
LOCATION:SISSA\, Santorio Building\, Room 131 (first floor)
URL://indico.ictp.it/event/a14140/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA seminar in Statistical and Condensed Matter Physi
 cs: "Non-equilibrium dynamics of strongly correlated cold atomic systems"\
 n
DTSTART;VALUE=DATE-TIME:20140225T140000Z
DTEND;VALUE=DATE-TIME:20140225T170000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14142@ictp.it
DESCRIPTION:I will discuss few examples of out of equilibrium dynamics of 
 trapped atomic systems.  I will first consider the breathing mode of an im
 purity coupled to a bath of interacting bosons. I will then proceed analyz
 ing topological pumping in the extended Bose-Hubbard model.  If time allow
 s I will briefly analyse the dynamics of colliding spin-polarized fermion 
 clouds.\n\n//indico.ictp.it/event/a14142/
LOCATION:ICTP
URL://indico.ictp.it/event/a14142/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Universal Behavior 
 of Shannon and Renyi Mutual Information of Quantum Spin Chains"
DTSTART;VALUE=DATE-TIME:20140306T103000Z
DTEND;VALUE=DATE-TIME:20140306T170000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14147@ictp.it
DESCRIPTION:In this talk we will first review the Shannon and Renyi entrop
 ies as\ninformation theoretic concepts and their use in quantum and classi
 cal\nsystems. They are quantities which usually base dependent.  Then we w
 ill\nintroduce mutual Shannon and mutual Renyi entropies as very useful\nq
 uantities to detect the universality classes of the quantum spin chains. W
 e\nwill present some conjectures regarding the connection of these quantit
 ies\nto central charge of the critical systems and then we will support th
 em with\nnumerical works done on the Ising model Q=3\,4 Potts model and XX
 Z spin chains.\nIn all of these cases we will emphasize on the bases that 
 one\nchooses to calculate these quantities and in particular we will show 
 that\nsome of the bases are actually more suitable to detect the universal
 ity\nclasses.\n\nReferences:\n1: FC Alcaraz\, MA Rajabpour\, Phys. Rev. Le
 tt. 111\, 017201 (2013)\n2: FC Alcaraz\, MA Rajabpour\, in preparation.\n\
 n//indico.ictp.it/event/a14147/
LOCATION:ICTP
URL://indico.ictp.it/event/a14147/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Universal quantum s
 imulator\, local convertibility and edge states in many-body systems"
DTSTART;VALUE=DATE-TIME:20140311T100000Z
DTEND;VALUE=DATE-TIME:20140311T170000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14155@ictp.it
DESCRIPTION:In some many-body systems\, certain ground state entanglement 
 (Renyi) entropies increase even as the correlation length decreases. This 
 entanglement non-monotonicity implies a stronger "quantum nature" of the w
 ave function and gives it a higher computational power\, compared to class
 ical manipulations. We will demonstrate that such a phenomenon\, known as 
 non-local convertibility\, is due to the edge state (de)construction occur
 ring in the system. To this end\, we employ the example of the Ising chain
 \, displaying an order-disorder quantum phase transitions. Employing  both
  analytical and numerical methods\, we compute entanglement entropies for 
 various system's bipartitions (A|B) and consider ground states with and wi
 thout Majorana edge states. We find that  the thermal ground states\, enjo
 ying the Hamiltonian symmetries\, show non-local convertibility if either 
 A or B are smaller than\, or of the order of\, the correlation length. In 
 contrast\, the ordered (symmetry breaking) ground state is always locally 
 convertible. The edge states behavior explains all these results and could
  disclose a paradigm to understand local convertibility in other quantum p
 hases of matter. The connection we establish between convertibility and no
 n-local\, quantum correlations provides a clear criterion of which feature
 s a universal quantum simulator should possess to outperform a classical m
 achine.\n\nReferences:\n-  Fabio Franchini\, Jian Cui\, Luigi Amico\, Heng
  Fan\, Mile Gu\, Vladimir E. Korepin\, Leong Chuan Kwek\, Vlatko Vedral.  
  http://arxiv.org/abs/1306.6685\n\n//indico.ictp.it/event/a14155/
LOCATION:SISSA\, Santorio Building\,  Room 128 (First floor)
URL://indico.ictp.it/event/a14155/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Precision Measureme
 nts of Temperature and Chemical Potential of Quantum Gases"
DTSTART;VALUE=DATE-TIME:20140313T103000Z
DTEND;VALUE=DATE-TIME:20140313T170000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14159@ictp.it
DESCRIPTION:We investigate the sensitivity with which the temperature and 
 the chemical potential characterizing quantum gases can be measured. We ca
 lculate the corresponding quantum Fisher information matrices for both fer
 mionic and bosonic gases. For the latter\, particular attention is devoted
  to the situation close to the Bose-Einstein condensation transition\, whi
 ch we examine not only for the standard scenario in three dimensions\, but
  also for generalized condensation in lower dimensions\, where the bosons 
 condense in a subspace of Hilbert space instead of a unique ground state\,
  as well as condensation at fixed volume or fixed pressure. We show that B
 ose Einstein condensation can lead to sub-shot noise sensitivity for the m
 easurement of the chemical potential. We also examine the influence of int
 eractions on the sensitivity in three different models\, and show that mea
 n-field and contact interactions deteriorate the sensitivity but only slig
 htly for experimentally accessible weak interactions.\n\n//indico.ictp.it/
 event/a14159/
LOCATION:ICTP
URL://indico.ictp.it/event/a14159/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Charge tran
 sport: The rise of the helical modes"
DTSTART;VALUE=DATE-TIME:20140327T103000Z
DTEND;VALUE=DATE-TIME:20140327T170000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14163@ictp.it
DESCRIPTION:Helical modes\, in which the momentum and spin quantum numbers
  are strongly coupled\, have recently appeared in the front line of one-di
 mensional physics through the discovery of materials exhibiting the quantu
 m spin-Hall effect. The fascinating conduction properties of the edge stat
 es of such materials is determined not just by the naturally strongly corr
 elated nature of one-dimensional quantum systems\, but also through the he
 lical nature of such modes.\n\nIn this presentation\, I will consider two 
 examples of helical modes.  The first arises in the edge states of the qua
 ntum spin-Hall effect\, where I will consider how the helical structure of
  the states influences the Kondo effect when one traps a single spin withi
 n a double constriction.  The second example appears when domain walls are
  induced into the quantum Hall state of bilayer graphene under appropriate
  gating.  I will demonstrate that one-dimensional helical modes form on th
 is kink\, which may then be tuned through a quantum phase transition in th
 e Z_2 universality class.  The helical nature of the modes means the two p
 hases on either side of this transition have distinct conducting propertie
 s\, in particular one is superfluid and the other is insulating.\n\nRefere
 nces:\n\nC.-W. Huang\, S.T. Carr\, D.  Gutman\, E. Shimshoni and A.D. Mirl
 in\, PRB 88\, 125134 (2013)\nV. Mazo\, C.-W. Huang\, E. Shimshoni\, S.T. C
 arr and H.A. Fertig\, arXiv:1309.1563\n\n//indico.ictp.it/event/a14163/
LOCATION:ICTP
URL://indico.ictp.it/event/a14163/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Giant magne
 todrag in graphene at charge neutrality"\n
DTSTART;VALUE=DATE-TIME:20140403T103000Z
DTEND;VALUE=DATE-TIME:20140403T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14165@ictp.it
DESCRIPTION:We report experimental data and theoretical analysis of Coulom
 b drag between two closely positioned graphene monolayers in a weak magnet
 ic field.  Close enough to the neutrality point\, the coexistence of elect
 rons and holes in each layer leads to a dramatic increase of the drag resi
 stivity.  Away from charge neutrality\, we observe nonzero Hall drag.  The
  observed phenomena are explained by decoupling of electric and quasiparti
 cle currents which are orthogonal at charge neutrality.  The sign of magne
 todrag depends on the energy relaxation rate and geometry of the sample.\n
 \n//indico.ictp.it/event/a14165/
LOCATION:ICTP
URL://indico.ictp.it/event/a14165/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Single Molecules: F
 rom Force Spectroscopy to Molecular Evolution"
DTSTART;VALUE=DATE-TIME:20140403T130000Z
DTEND;VALUE=DATE-TIME:20140403T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14167@ictp.it
DESCRIPTION://indico.ictp.it/event/a14167/
LOCATION:SISSA\, Santorio Building\, Room 128 (first floor)
URL://indico.ictp.it/event/a14167/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar: " From metadynamics to dynamics "
DTSTART;VALUE=DATE-TIME:20140505T103000Z
DTEND;VALUE=DATE-TIME:20140505T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14188@ictp.it
DESCRIPTION:Metadynamics is a commonly used and successful enhanced sampli
 ng method.  By the introduction of a history dependent bias which depends 
 on a restricted number of collective variables it can explore complex free
  energy surfaces characterized by several metastable states separated by l
 arge free energy barriers.  We recently extended its scope by introducing 
 a simple yet powerful method for calculating the rates of transition betwe
 en different metastable states.  The method does not rely on a previous kn
 owledge of the transition states or reaction coordinates\, as long as coll
 ective variables are known that can distinguish between the various stable
  minima in free energy space.  A statistical analysis of the distribution 
 of transition times allows us to verify a posteriori the reliability of ou
 r calculations\, and if any relevant slow collective variables are missing
 .  We apply our method to a number of examples of increasing complexity.  
 We find excellent agreement between our calculations and the results of lo
 ng unbiased molecular dynamics simulations whenever the latter are feasibl
 e.\n\nReferences\n1. P. Tiwary and M. Parrinello\, Phys. Rev. Lett. 111 (2
 30602)\, 2013.\n2. M. Salvalaglio\, P. Tiwary and M. Parrinello\, J. Chem.
  Theor.&  Comp. (in press)\, 2014.\n\n//indico.ictp.it/event/a14188/
LOCATION:ICTP
URL://indico.ictp.it/event/a14188/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Conformal Invariance
  of Critical Fluctuations in d=3
DTSTART;VALUE=DATE-TIME:20140506T100000Z
DTEND;VALUE=DATE-TIME:20140506T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14189@ictp.it
DESCRIPTION:Abstract:\nIt has been conjectured in 1971 by Polyakov that cr
 itical phenomena\nhave conformal invariance\, both in two and three dimens
 ions. While the\ntwo dimensional case has been intensely studied\, the rol
 e of conformal\ninvariance in d=3 is not fully clarified. We will describe
  which parts\nof conformal field theory carry over from d=2 to d=3. We wil
 l describe\nthe `conformal bootstrap' equations\, whose solutions should g
 ive\nconformally invariant algebras of local operators in d=3. The simples
 t\ncase is the operator algebra corresponding to the critical point of\nth
 e 3d Ising model. We conjecture that this operator algebra can be\ncharact
 erized by a minimal central charge condition. Numerical\nevidence for this
  conjecture will be presented. (based on\narxiv:1403.4545).\n\n//indico.ic
 tp.it/event/a14189/
LOCATION:SISSA\, Santorio Building\, Room 005
URL://indico.ictp.it/event/a14189/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Seminar on Disorder and strong electron correlations: "Fluctuation
 -induced first-order quantum phase transition of the U(1) spin liquid in a
  pyrochlore quantum spin ice"\n\n
DTSTART;VALUE=DATE-TIME:20140522T103000Z
DTEND;VALUE=DATE-TIME:20140522T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14198@ictp.it
DESCRIPTION:We predict\, using a free-energy calculation\, that the quantu
 m phase transition between the U(1) quantum spin liquid (QSL) and antiferr
 omagnet (AFM) phases in certain pyrochlore quantum spin ice is first order
  rather than second order.  This change in order from second to first orde
 r is induced by gauge fluctuations\, which are explicitly taken into accou
 nt at gauge theory level in our effective low-energy theory.  We therefore
  have identified a fluctuation-induced first-order quantum phase transitio
 n in pyrochlore quantum spin ice.  We explicitly derive the quantum free-e
 nergy description of this QSL-to-AFM phase transition and predict that it 
 is a weakly first-order phase transition.  We also briefly discuss the exp
 erimental relevance of this result.\n\n//indico.ictp.it/event/a14198/
LOCATION:ICTP
URL://indico.ictp.it/event/a14198/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Lecture in Statistical Physics of Complex Systems: "Algori
 thms for Computational Social Science"
DTSTART;VALUE=DATE-TIME:20140529T150000Z
DTEND;VALUE=DATE-TIME:20140529T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14201@ictp.it
DESCRIPTION:Abstract: \nThe availability of large datasets has allowed sci
 entists to probe the dynamics of social systems to unprecedented levels of
  details. We will provide a general overview of the main problems and give
  a few specific examples in three fields\, namely:\na) Language Dynamics \
 nb) Community Detection \nc) Citation Analysis\n\n//indico.ictp.it/event/a
 14201/
LOCATION:ICTP
URL://indico.ictp.it/event/a14201/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA INFORMAL SEMINAR on Statistical Physics: "Space U
 se by Foragers with Renewable Resources"
DTSTART;VALUE=DATE-TIME:20140529T130000Z
DTEND;VALUE=DATE-TIME:20140529T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14202@ictp.it
DESCRIPTION:Abstract:\nWe are participating in a project to study and unde
 rstand a keystone mutualistic system in the Patagonian temperate forest. I
 t is composed of two specialist partners: a small arboreal marsupial that 
 feeds on the fruits of a hemiparasite shrub and disperses it seeds. As par
 t of this effort we have described the movement of the animals in a hetero
 geneous landscape as a walk that dynamically affects its substrate.\n\nOur
  simplest model provides an insight on a number of relevant and non-intuit
 ive facts. Even without memory of the good places to feed and no explicit 
 cost of moving\, we observe the emergence of a finite home range. The reas
 on for this is that memory of the usage of the landscape is kept in the la
 ndscape itself. The arising paths looks surprisingly similar to real anima
 l tracks. We characterize this walks and their use of the resources in sev
 eral statistical ways. Preliminary results on population effects are explo
 red by means of a system of two non (directly) interacting animals.\n\nThi
 s work is a first step towards a complex model that will take into conside
 ration the interaction between plants and seed dispersers and the synergis
 tic effect that arises from their mutualistic interaction. Despite its ins
 piration on a very specific system\, this first step is of very general ap
 plication and may be of interest in other contexts.\n\n//indico.ictp.it/ev
 ent/a14202/
LOCATION:ICTP
URL://indico.ictp.it/event/a14202/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Chemical Physics: "Ensemble approaches to the 
 computer simulation of site-disordered solids"\n
DTSTART;VALUE=DATE-TIME:20140604T103000Z
DTEND;VALUE=DATE-TIME:20140604T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14203@ictp.it
DESCRIPTION:Site-occupancy disorder\, defined as the non-periodic occupati
 on of lattice sites in a crystal structure\, is a ubiquitous phenomenon in
  solid-state physics and chemistry. Examples are mineral solid solutions\,
  synthetic non-stoichiometric compounds and metal alloys. The experimental
  investigation of these materials using diffraction techniques only provid
 es averaged information of their structure. However\, many properties of i
 nterest in these solids are determined by the local geometry and degree of
  disorder\, which escape an “average crystal” description\, either fro
 m experiments or from theory.  In this talk\, I will introduce a methodolo
 gy for the computer simulation of site-disordered solids\, based on the co
 nsideration of configurational ensembles and statistical mechanics [1\, 2]
 . The number of occupancy configurations is reduced by taking advantage of
  the crystal symmetry of the lattice. Thermodynamics and non-thermodynamic
  properties are then defined from the statistics in the symmetry-adapted c
 onfigurational ensemble. I will briefly discuss some recent applications o
 f this methodology and of its generalization to grand-canonical ensembles 
 [3-7]. \n\n1.	R. Grau-Crespo\, S. Hamad\, et al.\, Symmetry-adapted config
 urational modelling of fractional site occupancy in solids. Journal of Phy
 sics-Condensed Matter\, 2007. 19: 256201.\n2.	R. Grau-Crespo and U. V. Wag
 hmare. Simulation of crystals with chemical disorder at lattice sites. In 
 Molecular Modeling for the Design of Novel Performance Chemicals and Mater
 ials. Edited by Beena Rai. CRC Press Inc. ISBN 9781439840788 (2012).\n3.	R
 . Grau-Crespo\, K. C. Smith\, et al.\, Thermodynamics of hydrogen vacancie
 s in MgH2 from first-principles calculations and grand-canonical statistic
 al mechanics. Physical Review B\, 2009. 80: 174117 \n4.	K. C. Smith\, T. S
 . Fisher\, U.V. Waghmare\, R. Grau-Crespo\, Dopant-vacancy binding effects
  in Li-doped magnesium hydride. Physical Review B\, 2010. 82: 134109.\n5.	
 R. Grau-Crespo\, N. H. De Leeuw\, et al.\, Phase separation and surface se
 gregation in ceria-zirconia solid solutions. Proceedings of the Royal Soci
 ety A-Mathematical Physical and Engineering Sciences\, 2011. 467: 1925-193
 8.\n6.	S. E. Ruiz-Hernandez\, R. Grau-Crespo\, et al.\, Mg/Ca partitioning
  between aqueous solution and aragonite mineral: a molecular dynamics stud
 y. Chemistry - A European Journal\, 2012. 18: 9828-9833.\n7.	P. Rivero\, I
 .D.P.R. Moreira\, R. Grau-Crespo\, S. N. Datta\, F. Illas. General model f
 or explicitly hole-doped superconductor parent compounds: Electronic struc
 ture of Ca2-xNaxCuO2Cl2  as a case study. Physical Review B\, 2013. 88\, 0
 85108.\n\n//indico.ictp.it/event/a14203/
LOCATION:ICTP
URL://indico.ictp.it/event/a14203/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Anderson Localizati
 on on the Bethe Lattice: Non-ergodicity of Extended States"
DTSTART;VALUE=DATE-TIME:20140613T100000Z
DTEND;VALUE=DATE-TIME:20140613T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14212@ictp.it
DESCRIPTION://indico.ictp.it/event/a14212/
LOCATION:SISSA\, Santorio Building\, Room 131 (first floor)
URL://indico.ictp.it/event/a14212/
END:VEVENT
BEGIN:VEVENT
SUMMARY:QUANTITATIVE BIOLOGY SEMINAR: "Gyrotactic Phytoplankton Swimming i
 n a Flow"
DTSTART;VALUE=DATE-TIME:20140708T130000Z
DTEND;VALUE=DATE-TIME:20140708T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14217@ictp.it
DESCRIPTION:Many aquatic microorganisms are able to swim and typically do 
 it in a moving\, sometimes turbulent\, fluid environment. The interaction 
 between swimming (self-propulsion) and flow advection can give rise to int
 eresting phenomenology\, especially concerning the spatial distribution of
  microbes. Many aspects of such interaction can be understood by using ide
 as and tools from dynamical systems theory and fluid mechanics. Here we sh
 all discuss some of these aspects focusing on the case study of gyrotactic
  phytoplankton\, which swims by means of two flagella opposite to the cent
 er of mass\, which is displaced with respect to the center of symmetry ---
  bottom heavy cells.\n\n//indico.ictp.it/event/a14217/
LOCATION:ICTP
URL://indico.ictp.it/event/a14217/
END:VEVENT
BEGIN:VEVENT
SUMMARY:QUANTITATIVE BIOLOGY SEMINAR: "Simple Behavior of Complex Biologic
 al Networks"
DTSTART;VALUE=DATE-TIME:20140710T150000Z
DTEND;VALUE=DATE-TIME:20140710T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14220@ictp.it
DESCRIPTION:Recent high-precision and high-throughput measurements of biol
 ogical networks dynamics have uncovered interesting results. Namely\, many
  biological systems appear to be critical (so that their dynamics can be c
 lassified into a handful of universal classes)\, or are described with hig
 h accuracy by surprisingly simple\, phenomenological models. I will explor
 e a handful of simple theoretical models inspired by these observations\, 
 suggesting plausible explanations for this emergence of coarse-grained sim
 plicity from complex microscopic structures.\n\n//indico.ictp.it/event/a14
 220/
LOCATION:ICTP
URL://indico.ictp.it/event/a14220/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Quantum Quenches in
  the XXZ Spin Chain and the Generalized Gibbs Ensemble"
DTSTART;VALUE=DATE-TIME:20140710T100000Z
DTEND;VALUE=DATE-TIME:20140710T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14225@ictp.it
DESCRIPTION:Isolated integrable quantum systems do not relax to a thermal 
 state even locally due to the extra conserved quantities that they possess
 . The so-called Generalized Gibbs Ensemble (GGE) was proposed to capture t
 he steady state of integrable systems\, but it has not been put to a strin
 gent test for genuinely interacting systems.\nIn the talk I will review ou
 r work on the non-equilibrium time evolution of the spin-1/2 anisotropic H
 eisenberg (XXZ) spin chain\, where we found that short-ranged spin correla
 tors in the long-time limit deviate significantly from predictions based o
 n the GGE hypothesis. By computing the asymptotic spin correlators within 
 the quench action formalism based on exact overlaps\, however\, we find ex
 cellent agreement with the numerical data. I will show why this result can
  be considered as conclusive evidence for the failure of the GGE and I wil
 l discuss the possible implications of this finding.\n\n//indico.ictp.it/e
 vent/a14225/
LOCATION:SISSA\, Santorio Building\, Room 138
URL://indico.ictp.it/event/a14225/
END:VEVENT
BEGIN:VEVENT
SUMMARY:QUANTITATIVE BIOLOGY SEMINAR: "Fluxes\, Scaling and Dimensions in 
 Fully Developed Turbulence"
DTSTART;VALUE=DATE-TIME:20140715T153000Z
DTEND;VALUE=DATE-TIME:20140715T180000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14221@ictp.it
DESCRIPTION:In this seminar\, I will discuss a few important open problems
  in 'Fully Developed Turbulence' concerning its most idealised realisation
 \, i.e. the case of statistically homogeneous and isotropic flows. I will 
 discuss the importance of inviscid conserved quantities in relation to the
  most striking statistical properties shown by all turbulent flows: the gr
 owth of small-scale strongly non-Gaussian fluctuations\, including the pre
 sence of anomalous scaling laws.  By using unconventional numerical meth
 odology\, based on a Galerkin decimation of helical Fourier modes\, I 
 will argue that some phenomena characterising homogeneous and isotropic fl
 ows might be important also for a much larger spectrum of applications\, i
 ncluding flows with geophysical and astrophysical relevance as for the cas
 e of rotating turbulence and/or conducting fluids.\n\n//indico.ictp.it/eve
 nt/a14221/
LOCATION:ICTP
URL://indico.ictp.it/event/a14221/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "New Results for Qua
 ntum Antiferromagnets in High Magnetic Fields"
DTSTART;VALUE=DATE-TIME:20140721T150000Z
DTEND;VALUE=DATE-TIME:20140721T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14226@ictp.it
DESCRIPTION:Frustrated antiferromagnets are a very rich class of physical 
 systems\, in which various new phases of matter are expected to be realize
 d. From a theoretical point of view\, however\, they present challenging d
 ifficulties and typically defy a full quantum treatment. A possible strate
 gy is to restrict oneself to a specific region of the parameter space\, na
 mely the one of high applied magnetic field\, where the problem can be map
 ped to a dilute Bose gas of magnons. In this way we can provide benchmarks
  for the latest numerical approaches\, such as in the case of the prototyp
 ical spin-1/2 XXZ model on the triangular lattice [1]. In more complicated
  models with competing exchange interactions\, we find new types of magnet
 ic order\, such as a double-q state with striped chiral order [2]. Several
  problems remain open in this field-theoretical approach\, in particular t
 hree-magnon and four-magnon scattering amplitudes\, which relate to a rece
 ntly discovered magnetic "0-pi" phase transition and to the stability of t
 he spin nematic phase respectively.\n\n[1] D. Yamamoto\, G. Marmorini and 
 I. Danshita\, Phys. Rev. Lett. 112\n(2014) 127203.\n[2] G. Marmorini and T
 . Momoi\, Phys. Rev. B 89\, 134425 (2014).\n\n//indico.ictp.it/event/a1422
 6/
LOCATION:ICTP
URL://indico.ictp.it/event/a14226/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Statistical Physics "Evolution of sex and reco
 mbination"\n
DTSTART;VALUE=DATE-TIME:20140821T103000Z
DTEND;VALUE=DATE-TIME:20140821T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14326@ictp.it
DESCRIPTION:I will introduce and discuss some basic population genetic mod
 els that have been studied to understand the evolution of sex and recombin
 ation. After explaining the known results\, I will describe some open prob
 lems in the subject.\n\n//indico.ictp.it/event/a14326/
LOCATION:ICTP
URL://indico.ictp.it/event/a14326/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on: "Nanoscience in Costa Rica and Computational 
 study of Pakhomovskyite electronic and magnetic properties"
DTSTART;VALUE=DATE-TIME:20140827T103000Z
DTEND;VALUE=DATE-TIME:20140827T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14328@ictp.it
DESCRIPTION:In this talk I'm going to present some of the experiments and 
 projects that are currently active at the Universidad de Costa Rica in the
  area of nanoscience.  In particular I'm going to mention some projects wh
 ere the support of DFT and MD calculations will have a relevant impact in 
 the interpretation and comprehension of present experimental results.\n\nI
 n the second part\, I'm going to focus on a specific project: "Ca-Co phosp
 hates as catalysts in water electrolysis".  This project aims to study the
  catalytic properties of Pakhomovskyite.\n\nPakhomovskyite is a vivianite 
 structure with layers of cobalt phosphate structures that are joined toget
 her by hydrogen bonds. This structure has been proposed for various cobalt
  based catalysts.  The main advantage is that the structure can sustain ch
 anges in oxidation state while the same structure remains.  The experiment
 al results lead to important questions in water splitting catalysis. Never
 theless\, none theoretical work has been done in this material.  Therefore
 \, in the present project we aim to use DFT calculations in order to study
  its magnetic and electronic properties\, allowing us to select the best c
 andidates to be synthesized later by the experimental group.\n\n//indico.i
 ctp.it/event/a14328/
LOCATION:ICTP
URL://indico.ictp.it/event/a14328/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal Seminar on Statistical Physics: "Extreme Events in Physic
 al Systems and Complex Networks"
DTSTART;VALUE=DATE-TIME:20140911T103000Z
DTEND;VALUE=DATE-TIME:20140911T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14335@ictp.it
DESCRIPTION:Extreme events such as cyclones\, earthquakes\, power blackout
 s or traffic jams are not uncommon.\nStudy of such events using the framew
 ork of extreme value theory has a long history. In this talk\, we will int
 roduce the idea of extreme events and review some of the recent results. \
 nIn the second half\, we will discuss transport processes based on random 
 walks and associated extreme events taking place on complex networks. We s
 how that extreme events on complex networks are more likely to take place 
 on small degree nodes and not on the hubs.\nWe will discuss some generalis
 ations and applications of these results.\n\n//indico.ictp.it/event/a14335
 /
LOCATION:ICTP
URL://indico.ictp.it/event/a14335/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Kondo Physics from 
 a Quantum Information Perspective"
DTSTART;VALUE=DATE-TIME:20140912T090000Z
DTEND;VALUE=DATE-TIME:20140912T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14336@ictp.it
DESCRIPTION:A characterization of a Kondo system using only entanglement m
 easures is provided. For this purpose: I shall firstly analyze a spin real
 ization of the single channel Kondo model and show how one can determine t
 he Kondo screening length by a measure of entanglement. I then show how th
 e entanglement with the impurity “stored” in the Kondo cloud may be us
 ed to generate distance independent long range entanglement between the en
 d point of a Kondo spin chain.\n\n//indico.ictp.it/event/a14336/
LOCATION:SISSA\, Santorio Building\, Room 5
URL://indico.ictp.it/event/a14336/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Low energy electron
 -phonon effective action from symmetry analysis"
DTSTART;VALUE=DATE-TIME:20140930T090000Z
DTEND;VALUE=DATE-TIME:20140930T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-a14347@ictp.it
DESCRIPTION:In this talk\, based on a detailed symmetry analysis\, I will 
 state the general rules to build up the effective low energy field theory 
 describing a system of electrons weakly interacting with the lattice degre
 es of freedom. The basic elements in the construction are the invariant te
 nsors that keep track of the microscopic discrete symmetries into the coar
 se-grained action. The approach can be applied to lattice systems in arbit
 rary dimensions and in a systematic way to any desired order in derivative
 s. I will show the application of the method to the honeycomb lattice and 
 re-obtain the well-known effective action for graphene\, containing Dirac 
 fermions coupled to a fictitious gauge field. The talk is based on the res
 ults of arXiv:1303.3442\n\n//indico.ictp.it/event/a14347/
LOCATION:SISSA\, Santorio Building\, Room 138 (first floor)
URL://indico.ictp.it/event/a14347/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Universal Dynamics 
 Near and Far from Equilibrium"
DTSTART;VALUE=DATE-TIME:20141010T123000Z
DTEND;VALUE=DATE-TIME:20141010T133000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7285@ictp.it
DESCRIPTION:Abstract:\n\n	The quantitative understanding of universal dyna
 mic properties of strongly correlated systems both near and far from equi
 librium poses one of the most diverse and challenging problems in contempo
 rary physics. Applications cover a huge range of scales\, from low temper
 ature states of condensed matter systems to the extreme states of matter 
 observed\, e.g.\, in ultra-relativistic heavy-ion collisions. Functional m
 ethods\, e.g.\, the functional renormalization group and effective action
  techniques\, as well as numerical lattice Monte Carlo methods offer a pow
 erful approach to tackle these problems and to resolve the nonperturbativ
 e dynamics. Here\, I focus on their applications to critical dynamics in 
 stochastic models with energy conservation as well as universal scaling ph
 enomena in hydrodynamic systems driven far from equilibrium.\n\n//indico.
 ictp.it/event/7285/
LOCATION:SISSA Cinema Room
URL://indico.ictp.it/event/7285/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Interaction Quench 
 in One-dimensional Bose Gas"
DTSTART;VALUE=DATE-TIME:20141014T090000Z
DTEND;VALUE=DATE-TIME:20141014T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7286@ictp.it
DESCRIPTION:\n	Abstract: We consider the quench of the one-dimensional Bos
 e gas from zero to infinite interaction\, in which the relation between mo
 des is nonlinear\, and consequently Wick's theorem does not hold. We provi
 de exact analytical results for the time evolution of the dynamical densit
 y-density correlation function. We prove that its stationary value is desc
 ribed by a Generalized Gibbs Ensemble (GGE). Finally\, we analyze the enta
 nglement properties of the the asymptotic steady state after the quench\; 
 we provide exact analytical results both for the leading extensive parts a
 nd the subleading terms for the entropies as well as for the cumulants of 
 the particle number fluctuations.\n\n//indico.ictp.it/event/7286/
LOCATION:SISSA "Cinema Room"
URL://indico.ictp.it/event/7286/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Topological Phases i
 n Ultracold Fermionic Gases
DTSTART;VALUE=DATE-TIME:20141021T120000Z
DTEND;VALUE=DATE-TIME:20141021T130000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7296@ictp.it
DESCRIPTION:The experimental simulation of gauge potentials and spin-orbit
  couplings in ultracold atomic gases paves the way to realize intriguing t
 opological phases in these physical setups. In this talk I will describe h
 ow the interplay between synthetic magnetic fields and spin-orbit coupling
 s allows to simulate topological insulators in optical lattices. I will an
 alyse some example of topological phase transitions in these systems and I
  will examine possible experimental signatures of the non-trivial topologi
 cal phases.\n\n//indico.ictp.it/event/7296/
LOCATION:SISSA\, Cinema Room
URL://indico.ictp.it/event/7296/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: Inverse problems for
  spreading dynamics on networks.
DTSTART;VALUE=DATE-TIME:20141104T100000Z
DTEND;VALUE=DATE-TIME:20141104T111500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7304@ictp.it
DESCRIPTION:Who are the most influential players in a social network? What
 's the origin of an epidemic outbreak? The answer to simple questions like
  these can hide incredibly difficult computational problems\, that require
  powerful methods for the inference\, optimization\, and control of dynami
 cal processes on large networks.\nI will present a statistical mechanics a
 pproach to inverse dynamical problems in the idealized framework provided 
 by simple models of irreversible contagion and diffusion on networks (line
 ar threshold model\, susceptible-infected-removed epidemic model). Using t
 he cavity method (belief propagation)\, it is possible to explore the larg
 e-deviation properties of the dynamics and develop efficient message-passi
 ng algorithms to solve optimization and inference problems even on large n
 etworks.\n\n//indico.ictp.it/event/7304/
LOCATION:SISSA Cinema Room - 1st floor
URL://indico.ictp.it/event/7304/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Eigenstate thermali
 zation hypothesis (ETH) and integrability in quantum spin chains"
DTSTART;VALUE=DATE-TIME:20141111T100000Z
DTEND;VALUE=DATE-TIME:20141111T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7310@ictp.it
DESCRIPTION:ABSTRACT\nWe investigate the eigenstate thermalization hypothe
 sis (ETH) in integrable models\, focusing on the spin-1/2 isotropic Heisen
 berg (XXX) chain.  We verify that ETH holds for typical eigenstates (weak
  ETH scenario).  Specifically\, using a numerical implementation of state
 -of-the-art Bethe ansatz results\, we study the finite-size scaling of the
  eigenstate-to-eigenstate fluctuations of the reduced density matrix.  Fl
 uctuations are normally distributed\, and their standard deviation decays 
 in the thermodynamic limit as L^{-1/2}\, with L the size of the chain.  T
 his is in contrast with the exponential decay that is found in generic non
 -integrable systems.  Finally\, we investigate the entanglement propertie
 s of the excited states of the XXX chain.  We numerically verify that typ
 ical mid-spectrum eigenstates exhibit extensive entanglement entropy (i.e.
 \, volume-law scaling).\n\n//indico.ictp.it/event/7310/
LOCATION:SISSA\, Santorio Building Cinema Room\, 1st floor
URL://indico.ictp.it/event/7310/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Glimmers of a quant
 um KAM theorem: Insights from quantum quenches in one dimensional Bose gas
 es"
DTSTART;VALUE=DATE-TIME:20141117T130000Z
DTEND;VALUE=DATE-TIME:20141117T140000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7318@ictp.it
DESCRIPTION:ABSTRACT\nWe consider quantum quenches in one dimensional Bose
  gases where we prepare the gas in the ground state of a parabolic trap an
 d then release it into a small cosine potential.  This cosine potential b
 reaks the integrability of the 1D gas which absent the potential is descri
 bed by the Lieb-Liniger model.  We explore the consequences of this cosin
 e potential on the thermalization of the gas.  We argue that the integrab
 ility breaking of the cosine does not immediately lead to ergodicity in as
  much as we demonstrate that there are residual quasi-conserved quantities
  post-quench.  We demonstrate that the quality of this quasi-conservation
  can be made arbitrarily good.\n\n//indico.ictp.it/event/7318/
LOCATION:SISSA\, Santorio Building Cinema Room\, 1st floor
URL://indico.ictp.it/event/7318/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Entanglement and pa
 rticle identity"
DTSTART;VALUE=DATE-TIME:20141118T100000Z
DTEND;VALUE=DATE-TIME:20141118T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7319@ictp.it
DESCRIPTION:ABSTRACT\nEntanglement of quantum states generically emerges v
 ia a partial observation.  Such observations are usually encoded by the o
 peration of a partial trace over one of the components.of the system.  Ne
 vertheless it is well-known that partial trace is not suitable to deal wit
 h general systems such as those involving identical particles.  Recently 
 (Phys. Rev. Lett. 110\, 080503 (2013)) we have proposed a procedure to add
 ress this problem of identical particles in a proper manner.  The procedu
 re is based on the properties of the algebra of observables of the system 
 and the GNS (Gelfand-Naimark-Siegel) construction of representations of su
 ch algebra.  In the present seminar\, we present our proposed approach to
  this problem and discuss some of its  applications and consequences.  F
 urther references are (arXiv:1212.1239\, arXiv:1301.1300\, arXiv:1302.4924
 ).\n\n//indico.ictp.it/event/7319/
LOCATION:SISSA\, Santorio Building Room 005\, 1st floor
URL://indico.ictp.it/event/7319/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Towards a holograph
 ic Bose-Hubbard model"
DTSTART;VALUE=DATE-TIME:20141125T100000Z
DTEND;VALUE=DATE-TIME:20141125T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7323@ictp.it
DESCRIPTION:Abstract\nWe present a holographic construction of the large-N
  Bose-Hubbard model. The model is based on Maxwell fields coupled to charg
 ed scalar fields on the AdS2 hard wall. We realize the lobe-shaped phase s
 tructure of the Bose-Hubbard model and find that the model admits Mott ins
 ulator ground states in the limit of large Coulomb repulsion. In the Mott 
 insulator phases\, the bosons are localized on each site. We find that the
  transition between Mott insulating phases with different fillings corresp
 onds to first order level-crossing phase transitions. We also derive the h
 olographic analog of the Mott/Superfluid phase transition between the homo
 geneous and non-homogeneous phases. We then analyze the perturbations of f
 ields around both the Mott insulator phase and Superfluid phase.\n\n//indi
 co.ictp.it/event/7323/
LOCATION:SISSA\, Santorio Building Cinema Room\, 1st floor
URL://indico.ictp.it/event/7323/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Viscoelastic Interf
 aces Driven in Disordered Media & Applications to Friction"
DTSTART;VALUE=DATE-TIME:20141128T140000Z
DTEND;VALUE=DATE-TIME:20141128T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7325@ictp.it
DESCRIPTION:\n	Abstract:\n	Many complex systems respond to a continuous in
 put of energy by an accumulation of stress over time\, interrupted by sudd
 en energy releases called avalanches. Recently\, it has been pointed out t
 hat several basic features of avalanche dynamics are induced at the micros
 copic level by relaxation processes\, which are neglected by most models. 
 We have studied a minimal modification of a well-known model of avalanche 
 dynamics\, in which we take into account the presence of "relaxation proce
 sses". Precisely\, we study a viscoelastic interface driven in a disordere
 d medium. \n	In mean-field\, we prove that our model interface has a peri
 odic behavior (with a new\, emerging time scale)\, with avalanche events t
 hat span the whole system. We compute semi-analytically the friction force
  acting on this surface\, and find that it is compatible with classical fr
 iction experiments. \n	In finite dimensions (2D)\, the mean-field system-
 sized events become local\, and numerical simulations give qualitative and
  quantitative results in good agreement with several important features of
  real earthquakes.\n\n	 \n\n//indico.ictp.it/event/7325/
LOCATION:SISSA\, Santorio Building Cinema Room\, 1st floor
URL://indico.ictp.it/event/7325/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "One dimensional KPZ
  growth equation and its replica solution"
DTSTART;VALUE=DATE-TIME:20141202T100000Z
DTEND;VALUE=DATE-TIME:20141202T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7326@ictp.it
DESCRIPTION://indico.ictp.it/event/7326/
LOCATION:SISSA\, Santorio Building  Cinema Room\, 1st floor
URL://indico.ictp.it/event/7326/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Universal dynamics 
 of a soliton after a quantum quench"
DTSTART;VALUE=DATE-TIME:20141216T100000Z
DTEND;VALUE=DATE-TIME:20141216T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7331@ictp.it
DESCRIPTION:Abstract\nIn a quantum quench\, one prepares a system in an ei
 genstate of a given Hamiltonian\, and then lets it evolve after suddenly c
 hanging a control parameter of the Hamiltonian.  By observing this evolut
 ion\, one aims at understanding whether and how a quantum system reaches a
  (thermal) equilibrium.  Typically\, the initial state is taken to be the
  ground state and/or in an extended state: we propose a different experime
 ntally feasible protocol\, in which the system is prepared in an excited s
 tate corresponding to a collective solitonic excitation.  If we are inter
 ested only in the single particle density\, in the hydrodynamic regime the
  time evolution can be reduced to a semi-classical non-linear differential
  equation.  The study of such equation shows that the short time dynamics
  after the quench is universal\, and simple analytical predictions can be 
 given for the velocities and profiles.  Numerical support for these resul
 ts is presented using the the Calogero model and the non-linear Schrodinge
 r equation (NLSE)\, relevant for the implementation of the proposed protoc
 ol with ultracold bosons.  The effect of non-integrable terms (power-law 
 non-linearity and a parabolic potential) in the NLSE is also investigated\
 , and shown to not spoil the universality.\n\n//indico.ictp.it/event/7331/
LOCATION:SISSA\, Santorio Building Room 005 (Ground floor)
URL://indico.ictp.it/event/7331/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Statistical aspects
  of quantum state monitoring and applications"
DTSTART;VALUE=DATE-TIME:20150113T100000Z
DTEND;VALUE=DATE-TIME:20150113T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7347@ictp.it
DESCRIPTION:Abstract\n \nQuantum trajectories of systems subjected to con
 tinuous monitoring exhibit particular stochastic behaviors such as "progre
 ssive collapses" and/or  ‘"quantum jumps"\, observed in various experim
 ents\, but also more peculiar features\, ‘’quantum spikes’’  whic
 h may be viewed as aborted jumps. This lecture will aim at describing some
  statistical properties of quantum trajectories.  We shall discuss statis
 tical aspects of progressive non-demolition weak measurements\, as impleme
 nted in cavity QED for instance. We shall present a quantitative understan
 ding of the statistics of quantum spikes and of their potential universali
 ty (in the sense that they are independent of the dynamical processes whic
 h generate them). As an illustration\, we shall discuss a scheme to contro
 l quantum flux through back-action measurement providing a potential examp
 le of a mesoscopic Maxwell daemon.\n\n//indico.ictp.it/event/7347/
LOCATION:SISSA\, Santorio Building Room 005\, Ground floor
URL://indico.ictp.it/event/7347/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Spin chains with a 
 non compact target""
DTSTART;VALUE=DATE-TIME:20150114T090000Z
DTEND;VALUE=DATE-TIME:20150114T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7350@ictp.it
DESCRIPTION:Abstract\n \nMost common critical systems in condensed matter
  and statistical mechanics are associated with a discrete set of critical 
 exponents\, which can be traced back to the compact nature of the correspo
 nding field theories.  There are however many noticeable cases where cont
 inuous spectra of exponents are observed\, a prominent example being that 
 of the Integer Quantum Hall Effect.  Whereas in the compact case a lot of
  insight is usually gained by turning to (integrable) regularizations such
  as lattice models or spin chains\, a connection between non compact field
  theories and the world of integrable spin chains has for long been lackin
 g.  In this talk\, we will see that there actually many 'physical' spin c
 hains or statistical lattice models corresponding to non compact conformal
  field theories.  There are many consequences to this observation\, and I
  will present applications of our results to polymer physics as well as to
  the construction of integrable truncations of the IQHE plateau transitons
 .\nThis is based on joint work with Jesper Jacobsen (LPTENS\, Paris) and H
 ubert Saleur (IPhT\, Saclay).\n\n//indico.ictp.it/event/7350/
LOCATION:SISSA\, Santorio Building Room 128\, first floor
URL://indico.ictp.it/event/7350/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Spacetime\, prime n
 umbers and Riemann zeros""
DTSTART;VALUE=DATE-TIME:20150120T100000Z
DTEND;VALUE=DATE-TIME:20150120T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7359@ictp.it
DESCRIPTION:Polya and Hilbert conjectured long ago that the non trivial ze
 ros of the Riemann zeta function are the oscillation frequencies of a phys
 ical system\, a result that would lead to a proof of the celebrated Rieman
 n hypothesis. In this talk we shall explain how  this idea can be realize
 d by the spectrum of a Dirac fermion in Rindler spacetime subject to a pot
 ential constructed from the prime numbers. This result points towards unex
 pected connections between Number Theory and Theoretical Physics.\n\n//ind
 ico.ictp.it/event/7359/
LOCATION:SISSA\, Santorio Building Room 005\, Ground floor
URL://indico.ictp.it/event/7359/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Simulation of the f
 ractional quantum Hall effect"
DTSTART;VALUE=DATE-TIME:20150127T100000Z
DTEND;VALUE=DATE-TIME:20150127T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7365@ictp.it
DESCRIPTION:Abstract\nWe perform an analysis of the role played by impurit
 ies in the fractional quantum Hall effect\, that is\, the mechanism that c
 auses\, in the lowest Landau level regime\, the formation of plateaux in t
 he resistivity as a function of the magnetic applied field. To this end wi
 thin the framework of quantum simulation\, we consider an impurity immerse
 d in a small ultracold quantum bosonic gas trapped in a rapidly rotating p
 otential (which generates an artificial magnetic field)\, an experimentall
 y realistic system adequate to realize quantum Hall effects. We use exact 
 diagonalization for few atoms and apply the linear response theory to simu
 late the transport equation. We provide a proposal of a theoretical techni
 que to detect the up-to-now elusive presence of strongly correlated states
  related to fractional filling factors in the context of ultracold atoms. 
 We analyse for the first time\, the conditions under which these strongly 
 correlated states are associated to the presence of the plateaux.\n\n//ind
 ico.ictp.it/event/7365/
LOCATION:SISSA\, Santorio Building Room 128 (first floor)
URL://indico.ictp.it/event/7365/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Nonequilibrium fluc
 tuations in quantum heat engines: Theory\, example\, and possible solid st
 ate experiments"
DTSTART;VALUE=DATE-TIME:20150129T130000Z
DTEND;VALUE=DATE-TIME:20150129T140000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7366@ictp.it
DESCRIPTION:Abstract\nWe study the stochastic energetic exchanges in quant
 um heat engines.  Due to microreversibility\, these obey a fluctuation re
 lation\, called the heat engine fluctuation relation\, which implies the C
 arnot bound: no machine can have an efficiency larger than Carnot's effici
 ency. The stochastic thermodynamics of a quantum heat engine (including th
 e joint statistics of heat and work and the statistics of efficiency) is i
 llustrated by means of an optimal two-qubit heat engine\, where each qubit
  is coupled to a thermal bath and a two-qubit gate determines energy excha
 nges between the two qubits. We discuss possible solid state implementatio
 ns with Cooper pair boxes and flux qubits\, quantum gate operations\, and 
 fast calorimetric on-chip measurements of single stochastic events.\n\n//i
 ndico.ictp.it/event/7366/
LOCATION:SISSA\, Santorio Building Room 005 (ground floor)
URL://indico.ictp.it/event/7366/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Form factor relocal
 isation and interpolating renormalisation group flows from the staircase m
 odel"
DTSTART;VALUE=DATE-TIME:20150130T130000Z
DTEND;VALUE=DATE-TIME:20150130T140000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7367@ictp.it
DESCRIPTION:Abstract\nWe investigate the staircase model\, introduced by A
 liosha Zamolodchikov through an analytic continuation of the sinh-Gordon 
 S-matrix to describe interpolating flows between minimal models of confor
 mal field theory in two dimensions. Applying the form factor expansion an
 d the c-theorem\, we show that the resulting c-function has the same physi
 cal content as that found by Zamolodchikov from the thermodynamic Bethe A
 nsatz. This turns out to be a consequence of a nontrivial underlying mech
 anism\, which leads to an interesting localisation pattern for the spectr
 al integrals giving the multi-particle contributions. We demonstrate seve
 ral aspects of this form factor relocalisation\, which suggests a novel a
 pproach to the construction of form factors and spectral sums in integrabl
 e renormalisation group flows with non-diagonal scattering.\n\n//indico.i
 ctp.it/event/7367/
LOCATION:SISSA\, Santorio Building Room 005 (ground floor)
URL://indico.ictp.it/event/7367/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Temperature inversi
 on in long-range interacting systems"
DTSTART;VALUE=DATE-TIME:20150217T100000Z
DTEND;VALUE=DATE-TIME:20150217T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7385@ictp.it
DESCRIPTION: Abstract\n \n \nTemperature inversions occur in nature\, e
 .g.\, in the solar corona and in interstellar molecular clouds: somewhat c
 ounterintuitively\, denser parts of the system are colder than dilute ones
 . We try to understand which are the minimal ingredients and the basic phy
 sical mechanism behind such phenomena. We suggest that temperature inversi
 ons may spontaneously occur in a generic system with long-range interactio
 ns that is prepared in an inhomogeneous thermal equilibrium state and then
  brought out of equilibrium by applying an impulsive perturbation. In simi
 lar situations\, short-range systems would typically relax to another ther
 mal equilibrium\, with uniform temperature profile. By contrast\, in long-
 range systems\, the interplay between wave-particle interaction and spatia
 l inhomogeneity drives the system to nonequilibrium stationary states that
  generically exhibit nonuniform temperature profiles with temperature inve
 rsion. This shows how crucial the role played by the range of interparticl
 e interactions is in determining the nature of steady states attained when
  macroscopic systems are brought out of thermal equilibrium.\n\n//indico.i
 ctp.it/event/7385/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7385/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics seminar: "Local integrals
  of motion in the many-body localized phase"
DTSTART;VALUE=DATE-TIME:20150218T150000Z
DTEND;VALUE=DATE-TIME:20150218T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7387@ictp.it
DESCRIPTION:Abstract\n \nMany-body localization is the suppression of tra
 nsport in disordered\, interacting systems. It is now clear that many real
 istic disordered spin and particle systems do possess such a phase and tha
 t this has profound implications for the system's dynamics. Recently\, a c
 haracterization of the MBL phase has been proposed in terms of the existen
 ce of local integrals of motion. I will show how to build such local integ
 rals of motion in perturbation theory in the interaction and how to find t
 he phase boundaries.  If time allows\, I will also comment on the implica
 tions of this work for the performance of the quantum adiabatic algorithm.
 \n  Joint work with  M. Müller\, V. Ros.\n\n//indico.ictp.it/event/7387
 /
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7387/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "Many-body localized systems under driving"
DTSTART;VALUE=DATE-TIME:20150219T090000Z
DTEND;VALUE=DATE-TIME:20150219T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7388@ictp.it
DESCRIPTION:Abstract\nIsolated many-body quantum systems may fail to therm
 alize due to quantum interferences. This phenomenon has the same origin as
  Anderson localization and is referred to as many-body localization (MBL).
  In this talk\, we will investigate how a localized system responds to an 
 external time-dependent driving. In particular\, we will ask whether the s
 ystem absorbs energy until it reaches an infinite temperature state\, as i
 t would be the case for an ergodic system\, or whether absorption eventual
 ly saturates.\nCollaboration with D. Abanin\, W. De Roeck\, Z. Papic and P
 . Ponte.\n\n//indico.ictp.it/event/7388/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7388/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Chemical Physics: "Modelling charge transfer i
 n molecular materials: from photovoltaics to ferroelectrics"
DTSTART;VALUE=DATE-TIME:20150219T103000Z
DTEND;VALUE=DATE-TIME:20150219T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7389@ictp.it
DESCRIPTION:Abstract\nCharge transfer (CT) interactions between electron d
 onor (D) and acceptor (A) molecules are central to many physical phenomena
  in chemistry\, biology and materials science. In this talk I will present
  some recent work on the modelling D/A interfaces for photovoltaic applica
 tions and mixed-stack CT crystals\, for which we propose a multiscale mode
 lling approach based on first-principles and model Hamiltonian electronic 
 structure calculations\, and classical schemes to account for electrostati
 c and polarization interactions at the mesoscale.\n\n//indico.ictp.it/even
 t/7389/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7389/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Integrable matrix-v
 alued fields and gauge theories as nonintegrable deformations"
DTSTART;VALUE=DATE-TIME:20150219T130000Z
DTEND;VALUE=DATE-TIME:20150219T140000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7394@ictp.it
DESCRIPTION:Abstract\n \nWe study in depth the (1+1)-dimensional principa
 l chiral sigma model. This is an asymptotically-free  N\\times N matrix-v
 alued field with massive excitations. We compute all the form factors of s
 everal operators combining the integrable bootstrap program and 't Hooft's
  large-N limit. These results are used to compute finite volume/temperatur
 e expectation values at large N. The matrix structure leads to nontrivial 
 thermodynamics that are not captured by the trivial large-N thermodynamic 
 Bethe ansatz. We also study different Yang-Mills theories in 1+1 and 2+1 d
 imensions as nonintegrable deformations of the sigma model. We address the
  problems of quark confinement and the glueball spectrum using ideas of fo
 rm factor perturbation theory.\n\n//indico.ictp.it/event/7394/
LOCATION:SISSA\, Santorio Building Room 138 (first floor)
URL://indico.ictp.it/event/7394/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Tensor networks met
 hods for lattice gauge theories"
DTSTART;VALUE=DATE-TIME:20150225T130000Z
DTEND;VALUE=DATE-TIME:20150225T140000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7397@ictp.it
DESCRIPTION:Abstract\n \nRecently tensor network  methods have been exte
 nded so to better address lattice gauge theories. Tensor networks can be 
 used either as an analytical tool to better understand lattice gauge theo
 ries or as a variational ansatz for their numerical simulations. I will 
 present results in both directions for 2D lattice gauge theories with con
 tinuous symmetry groups.\n\n//indico.ictp.it/event/7397/
LOCATION:SISSA\, Santorio Building Room 128\, first floor
URL://indico.ictp.it/event/7397/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Aspects of entangle
 ment of/between disjoint regions in CFT and holography"
DTSTART;VALUE=DATE-TIME:20150303T100000Z
DTEND;VALUE=DATE-TIME:20150303T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7402@ictp.it
DESCRIPTION:Abstract\n \nMutual information and logarithmic negativity ar
 e important quantities to understand entanglement in pure and mixed state
 s. In quantum field theories they are computed by employing a method based
  on the replica limit. We present a numerical method to compute the holog
 raphic mutual information in AdS4 for generic shapes and another numerical
  method to address the replica limit that turns out to be useful whenever
  the replica limit is not known analytically\, like for the entanglement 
 entropy of disjoint intervals in 2D CFTs. We also discuss the logarithmic 
 negativity at finite temperature in 2D CFTs.\n\n//indico.ictp.it/event/74
 02/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7402/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics seminar: "Solitonic defec
 ts in quenched cooled Bose-Einstein condensates"
DTSTART;VALUE=DATE-TIME:20150304T150000Z
DTEND;VALUE=DATE-TIME:20150304T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7401@ictp.it
DESCRIPTION:Abstract\nThe Kibble-Zurek mechanism (KZM) describes the spont
 aneous formation of defects in systems that cross a second-order phase tra
 nsition at a finite rate.  The mechanism\, first proposed in the context 
 of cosmology\, is ubiquitous in nature and regards both classical and quan
 tum phase transitions.  We will report on the observation of the KZM on u
 ltracold atoms which are rapidly cooled across the BEC phase transitions. 
  The defects of the order parameter\, imprinted via the KZM\, evolve into
  solitonic vortices.  Clear signatures of the nature of such excitations 
 are the twisted planar density depletion around the vortex line\, observed
  after ballistic expansion\, and the double dislocation in the interferenc
 e pattern obtained through homodyne techniques.  Both methods allow us to
  determine the sign of the quantized circulation.  Experimental observati
 ons agree with numerical simulations.  These solitonic vortices show a ve
 ry long lifetime.\n\n//indico.ictp.it/event/7401/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7401/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Extensions of the G
 GE hypothesis in higher dimensions"
DTSTART;VALUE=DATE-TIME:20150310T100000Z
DTEND;VALUE=DATE-TIME:20150310T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7404@ictp.it
DESCRIPTION:Abstract\nWe consider a d-dimensional quantum system that is p
 repared in a general initial state that satisfies the cluster decompositio
 n principle and evolves under a noninteracting Hamiltonian\, a setup that 
 can be realised by a quantum quench. We show that\, in the thermodynamic l
 imit\, the dominant large time behaviour of any multipoint correlation fun
 ction can be expressed in terms of the (conserved) occupations of momentum
  modes of the system\, for any spatial dimension d and independently of wh
 ether the system tends to a stationary state or not. This result is an ext
 ension of the GGE hypothesis\, which is conjectured to describe the equili
 brium properties of 1d integrable systems after a quantum quench. We furth
 er show that the same reasoning suggests a precise criterion for determin
 ing which conserved charges must be included in the GGE of a general 1d in
 tegrable model.\n\n//indico.ictp.it/event/7404/
LOCATION:SISSA\, Santorio Building Room 128\, first floor
URL://indico.ictp.it/event/7404/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "Transport of Lithium ions in a LiMn_2O_4 Nanowir
 e Cathode of a nano Lithium Ion Battery"
DTSTART;VALUE=DATE-TIME:20150313T100000Z
DTEND;VALUE=DATE-TIME:20150313T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7407@ictp.it
DESCRIPTION:Abstract\n \n \nStructural phase transition of electrode mat
 erials in lithium ion batteries (LIBs) during charge-discharge processes r
 esults in capacity decrease\, and it shorten the LIB life.  In order to a
 void capacity decrease\, we developed a nano lithium ion battery with a si
 ngle LiMn2O4 nanowire as a positive electrode\, and electronic and structu
 ral behavior were studied in-situ in a sub-50pm resolution electron micros
 cope. The LiMn2O4 (LMO) nanowire electrode contacts with ionic liquid elec
 trolyte (ILE) and LTO used as the negative electrode. The LMO nanowires ha
 d\, in average\, lengths of 0.1~0.2mm and diameters of 100nm~200nm. The na
 nowire electrode is free standing\, being suspended between Pt and ILE.\nT
 he nanowire battery showed no capacity degradation at high charge/discharg
 e rate (fully charged within 20 minutes) from the first charge/discharge c
 ycle\, and structure of LMO transformed reversibly while the cyclic voltam
 metry between 3.5 – 5.5 V (Li/Li+). The structure of the nanowire at the
  area of ILE/LMO contact showed cubic to tetragonal phase transformation. 
 The other part of the nanowire showed non-equilibrium structure with a den
 sity fluctuation. In the charge/discharge process 80% of the lithium ions 
 are transferred from the LMO nanowire and returned to it reversible\, alth
 ough non-equilibrium distribution of the charge density of Lithium ions al
 ong the nanowire. The dynamic of lithium ion transport at high charging ra
 te (large potential difference) should be understood.\n \nReferences:\n1.
  S. Lee\, et al.\, J. Phys. Chem. C 117\, 24236 (2013).\n2. S. Lee et al\,
  DOI: 10.1021/nn505952k (2014).\n \n\n//indico.ictp.it/event/7407/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7407/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Supersolidity in th
 e bosonic Hubbard model"
DTSTART;VALUE=DATE-TIME:20150317T090000Z
DTEND;VALUE=DATE-TIME:20150317T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7411@ictp.it
DESCRIPTION:Abstract\n \n \nOne of the intriguing results of low tempera
 ture physics in the twentieth century was the discovery of superfluidity\,
  a highly coherent quantum phase of matter exhibiting frictionless flow t
 hrough cavities. Even more counterintuitive was the suggestion that this 
 can occur in a phase of matter in which long-range crystalline order is m
 aintained. In 2004 Kim and Chan [1]\, by measuring the rotational inertia 
 of a solid sample in torsional oscillator experiment raised the possibili
 ty of a supersolid phase in helium II. The results of this experiment have
  been questioned since\, the issue of supersolidity in helium II is still
  open. Anderson [2] argued that the ground state of the bosonic Hubbard m
 odel also exhibits a supersolid phase at integer fillings. Anderson`s arg
 ument is based on the leading terms of a perturbative expression of the H
 amiltonian and analyzing the response to a boundary twist [3]. In this ta
 lk it is shown how a variational Monte Carlo method [4] can be constructed
  based on the Baeriswyl wavefunction [5]. The scheme is equivalent to the
  perturbation expansion used by Anderson\, however\, in this case the ful
 l expansion is performed. The phase diagram obtained is in excellent agree
 ment with quantum Monte Carlo results. We also investigate the sensitivit
 y of the system to a boundary twist\, and find that it is sizeable even f
 or integer fillings. To understand the nature of the phase we use a single
 -particle [6] and a many-particle localization quantity [7] and find that
  at integer fillings the system exhibits many-particle localization\, at 
 the same time\, single particles as a result of bosonic exchange\, can del
 ocalize over the entire lattice. Away from integer fillings\, where the s
 ystem is known to be superfluid\, delocalization is found at both the sing
 le-particle and many-particle level. We interpret these results as a sign
 ature of supersolidity in the Bose-Hubbard model at integer filling.\n \
 nReferences:\n[1] E. Kim and M. H. W. Chan\, Science\, 305 1941 (2004).\n[
 2] P. W. Anderson\, J. Low Temp. Phys.\, 169 124 (2012).\n[3] W. Kohn\, Ph
 ys. Rev.\, A133 171 (1964).\n[4] B. Hetényi and B. Tanatar\, work in pro
 gress.\n[5] D. Baeriswyl in Nonlinearity in Condensed Matter\, Ed. A. R. B
 ishop\, D. K. Campbell\, D. Kumar\, and S. E. Trullinger\, Springer-Verlag
  (1986).\n[6] A. Selloni\, P. Carnevali\, R. Car\, and M. Parrinello\, Phy
 s. Rev. Lett. 59 823 (1987)\; E. S. Fois\, A. Selloni\, M. Parrinello\, 
 and R. Car\, J. Phys. Chem. 92 3268 (1988).\n[7] R. Resta\, Phys. Rev. Le
 tt.\, 80 1800 (1998)\; R. Resta and S. Sorella\, Phys. Rev. Lett. 82 370 (
 1999).\n\n//indico.ictp.it/event/7411/
LOCATION:SISSA\, Santorio Building Room 128 (first floor)
URL://indico.ictp.it/event/7411/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Spontaneous Breakin
 g of U (N) symmetry in  invariant Matrix Models and localization"
DTSTART;VALUE=DATE-TIME:20150324T100000Z
DTEND;VALUE=DATE-TIME:20150324T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7413@ictp.it
DESCRIPTION:Abstract\n \n \nMatrix Models have a strong history of succe
 ss in describing a variety of situations\, from nuclei spectra to conducti
 on in mesoscopic systems\, from strongly interacting systems to various as
 pects of mathematical physics. Traditionally\, the requirement of base inv
 ariance has lead to a factorization of the eigenvalue and eigenvector dist
 ribution and\, in turn\, to the conclusion that invariant models describe 
 extended systems. Moreover\, Wigner-Dyson statistics for the eigenvalues i
 s a hallmark of eigenvector delocalization. We show that deviations of the
  eigenvalue statistics from the Wigner-Dyson universality reflects itself 
 on the eigenvector distribution and that a gap in the eigenvalue density b
 reaks  the U(N) symmetry to a smaller one. This spontaneous symmetry brea
 king means that egeinvectors become localized and that the system looses e
 rgodicity.\nWe also consider models with log-normal weight. Their eigenval
 ue distribution is intermediate between Wigner-Dyson and Poissonian\, whic
 h candidates these models for describing a system intermediate between the
  extended and localized phase. We show that they have a much richer energy
  landscape than expected\, with their partition functions decomposable in 
 a large number of equilibrium configurations\, growing exponentially with 
 the matrix rank. We will discuss the meaning of this energy landscape and 
 its implication\, commenting on the perspectives for localization problems
 .\n \n- F. Franchini\; "On the Spontaneous Breaking of U(N) symmetry in i
 nvariant Matrix Models"\; arXiv:1412.6523.\n- F. Franchini\; "Toward an in
 variant matrix model for the Anderson Transition"\; arXiv:1503.03341.\n\n/
 /indico.ictp.it/event/7413/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7413/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Quantum quenches in
  integrable systems: The quench action approach"
DTSTART;VALUE=DATE-TIME:20150331T120000Z
DTEND;VALUE=DATE-TIME:20150331T130000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7428@ictp.it
DESCRIPTION:Abstract\nQuantum quenches\, i.e. the coherent time evolution 
 of a many- body quantum system\, are one of the most studied realizations
  of non- equilibrium physics. In this talk I would like to discuss a rece
 nt method- the quench action approach- that allows us to obtain the post-
 quench steady state for integrable systems directly in the thermodynamic l
 imit. The main focus of my talk are the recent results in the N ́eel to 
 XXZ ( Delta >= 1) quench\, showing a failure of the GGE (based on all the 
 known local charges) to predict the stationary behavior of the system. If
  the time suffices\, I’ll briefly discuss also some preliminary results 
 for the release of a hard-core bosons gas from a harmonic trap.\n\n//indi
 co.ictp.it/event/7428/
LOCATION:SISSA\, Santorio Building Room 005 (ground floor)
URL://indico.ictp.it/event/7428/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Impact of hidden sy
 mmetry breaking on the  non-equilibrium time evolution of  local observabl
 es and entanglement entropies "
DTSTART;VALUE=DATE-TIME:20150410T090000Z
DTEND;VALUE=DATE-TIME:20150410T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7431@ictp.it
DESCRIPTION:Abstract\n \n \nI discuss some effects of (interacting) pert
 urbations to the Hamiltonian of the quantum XY model in the non-equilibriu
 m time evolution after a global quench. At sufficiently large times the pe
 rturbations dramatically affect the expectation values of local observable
 s. The leading contribution can be traced back to the breaking of non-abel
 ian integrability\, which is manifest at times proportional to the inverse
  perturbation strength. I describe different scenarios for the time evolut
 ion of observables\, focusing on the emergence of persistent oscillations.
  Finally\, I point out a scaling behaviour for the time evolution of the e
 ntanglement entropies of spin blocks\, which is essentially independent of
  the quench details.\n\n//indico.ictp.it/event/7431/
LOCATION:SISSA\, Santorio Building Room 005 (ground floor)
URL://indico.ictp.it/event/7431/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics seminar: "Combining elect
 ronic-structure and enhanced-sampling molecular dynamics methods to model 
 fuel-cell electrodes in working conditions"
DTSTART;VALUE=DATE-TIME:20150415T140000Z
DTEND;VALUE=DATE-TIME:20150415T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7437@ictp.it
DESCRIPTION:Abstract\n \n \nPlatinum-group metals supported and disperse
 d on highly reducible oxides are common active catalysts for the industria
 l synthesis of chemical products and for renewable-energy applications suc
 h as fuel cells or artificial photosynthesis. Due to the high price of Pt\
 , the sustainable development of these technologies requires new materials
  that reduces the content of precious metal without affecting the device e
 fficiency.\n \nI will discuss the challenges opened by these systems to e
 lectronic-structure modelling and will present a case study in the context
  of fuel-cell electrodes. Ab-initio materials modelling is used to provide
  key insight into the properties of a novel class of non-conventional cata
 lysts with ultra-low metal loading.\n \nWe combine DFT simulations with a
 b-initio molecular dynamics\, atomistic thermodynamics\, metadynamics\, an
 d umbrella sampling methods to reveal the new surface chemistry opened by 
 these systems. The calculations are used to characterise the structure and
  the reactivity of the electrode active sites in a wide range of compositi
 ons and environments\, ranging from model surfaces at T=0K in vacuum condi
 tions to realistic wet electrodes at finite temperatures\, i.e. chemical r
 eactions at complex solid-liquid interfaces comprising nano-structured sur
 faces in contact with a solution.\n \nThe calculated results allow for ra
 tionalising the available experimental data and identify correlations amon
 g the reaction mechanisms\, thermodynamic efficiency\, and local structure
  of the active sites\, thus shedding light on the origins of the amplified
  reactivity and stability of these novel electrodes.\n \n\n//indico.ictp.
 it/event/7437/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7437/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Localization/Deloca
 lization transition in an interacting quasi-periodic fermionic chain "
DTSTART;VALUE=DATE-TIME:20150421T090000Z
DTEND;VALUE=DATE-TIME:20150421T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7439@ictp.it
DESCRIPTION:\n	Abstract\n \n \nWe consider a fermionic chain with an in
 commensurate external potential and a short range many body interaction.\n
 In absence of interaction and for potentials large enough there is Anderso
 n localization as follows from KAM-type results on the spectrum of the si
 ngle particle Schroedinger equation. We show the persistence of localizati
 on even in presence of interaction in the interacting ground state\, under
  suitable diophantine assumptions on the frequency and for suitable densit
 ies and weak interaction.\nThis is obtained by proving the convergence of 
 the renormalized expansion for the correlations in the thermodynamic limit
 \; such series have a small divisor problem somewhat similar to the one in
  Lindstedt series for KAM tori\; however a major new difficulty is due to
  the presence of loops\, which are absent in KAM classical problems.\n\n/
 /indico.ictp.it/event/7439/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7439/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Correlation functio
 ns of  in and out-of-equilibirum integrable models"
DTSTART;VALUE=DATE-TIME:20150422T120000Z
DTEND;VALUE=DATE-TIME:20150422T130000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7445@ictp.it
DESCRIPTION:Abstract\n \n \nInteracting integrable models\, as the one-d
 imensional Lieb-Liniger point-interacting Bose gas and the XXZ spin chain\
 , constitute a solid platform where to study highly excited states of int
 eracting systems. In particular the structure of their excitations\, toget
 her with the exact matrix elements\, provides an efficient tool to evalua
 te dynamical correlation functions of equilibrium and non-equilibrium stat
 es. We will first show how an efficient numerical summation (ABACUS algori
 thm) over a restrict set of excitations around the steady state\, provide
 s the time evolution of the static density moment g2(x=0) after a quench 
 from the free bosonic ground state (BEC state) to the Lieb-Liniger gas. I
 n the limit of Tonks-Girardeau gas this summation can be exactly computed 
 for two-body observables giving the post-quench time evolution of the mome
 ntum distribution function (De Nardis & Caux\, J. Stat. Mech. (2014) P120
 12) . When the coupling constant is finite the analytical summation over t
 he excitations is much harder to compute. We will however show how some re
 cent results on the thermodynamics of the density form factors (De Nardis 
 & Panfil\, J. Stat. Mech. (2015) P02019) give hope in this direction. Fin
 ally we will comment on the recent surprising results on the role of the l
 ocal conserved charges in determining the steady state after a quench in t
 he XXZ spin chain (Wouters et al.\, Phys. Rev. Lett. 113\, 117202 (2014))
 .\n\n//indico.ictp.it/event/7445/
LOCATION:SISSA\, Santorio Building Room 005 (Ground Floor)
URL://indico.ictp.it/event/7445/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Quantifying entangl
 ement in arbitrary states of 1d quantum critical systems"
DTSTART;VALUE=DATE-TIME:20150428T093000Z
DTEND;VALUE=DATE-TIME:20150428T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7448@ictp.it
DESCRIPTION:Abstract\nWe set up a systematic framework to calculate Renyi 
 entropies and matrix elements of the reduced density matrix for arbitrary 
 states (e.g. excited states) in 1+1d conformal field theories. Our approac
 h involves novel CFT techniques including transformation of descendant fi
 elds under conformal mappings and evaluation of descendant n-point functio
 ns. As applications we calculate the second Renyi entropies of several in
 dividual excited states in the Ising\, the free boson and the three-state 
 Potts models both with periodic and open boundary conditions. We check the
  predictions against numerics coming from DMRG (preliminary) and demonstra
 te that in principle we can indeed characterize any excited state in quant
 um critical systems in our present framework. We also find that in a certa
 in range of the relative subsystem size the second Renyi entropy for excit
 ed states shows a "quasi thermodynamic" behavior: it is extensive but obey
 s a nonlinear 1st law analog and only depends on the excitation energy. A
 s a further application we show (preliminary) results for ground and exci
 ted state Renyi entropies in the massive Ising model using a truncated con
 formal space approach.\n\n//indico.ictp.it/event/7448/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7448/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Quantum quenches in
  Chern insulators"
DTSTART;VALUE=DATE-TIME:20150505T090000Z
DTEND;VALUE=DATE-TIME:20150505T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7452@ictp.it
DESCRIPTION: Abstract\n \nIn this talk I will discuss the non-equilibriu
 m response of Chern insulators [1]. Focusing on the Haldane model\, we stu
 dy the dynamics induced by quantum quenches between topological and non-to
 pological phases. A notable feature is that the Chern number\, calculated 
 for an infinite system\, is unchanged under the dynamics following such a 
 quench. However\, in finite geometries\, the initial and final Hamiltonian
 s are distinguished by the presence or absence of edge modes. We study the
  edge excitations and describe their impact on the experimentally-observab
 le edge currents and magnetization. We show that\, following a quantum que
 nch\, the edge currents relax towards new equilibrium values\, and that th
 ere is light-cone spreading of the currents into the interior of the sampl
 e. \n \n[1] M. D. Caio\, N. R. Cooper\, M. J. Bhaseen\, Quantum Quenches
  in Chern Insulators\, arXiv:1504.01910\n\n//indico.ictp.it/event/7452/
LOCATION:SISSA\, Santorio Building Room 128 (First floor)
URL://indico.ictp.it/event/7452/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics seminar: "Quantum simulat
 ion of a simple lattice gauge theory: QED beyond quantum link models"
DTSTART;VALUE=DATE-TIME:20150513T140000Z
DTEND;VALUE=DATE-TIME:20150513T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7457@ictp.it
DESCRIPTION://indico.ictp.it/event/7457/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7457/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Chemical Physics: "Tuning properties of suppor
 ted graphene through chemical functionalization and substrate modification
 s"
DTSTART;VALUE=DATE-TIME:20150518T093000Z
DTEND;VALUE=DATE-TIME:20150518T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7465@ictp.it
DESCRIPTION:Abstract\nGraphene\, a two dimensional monoatomic thick lattic
 e of sp2 hybridized C atoms\, has been a material of immense interest over
  the last few years because of its interesting properties. It is seen as a
  potential candidate for applications in diverse areas starting from elect
 ronics to catalysis. However\, for most of the applications\, graphene nee
 ds to be supported on substrates. As a result of the interaction between g
 raphene and the substrate\, properties of the graphene sheet might be alte
 red. In my talk I will describe our efforts in understanding the interacti
 on of graphene supported on ferromagnetic Ni(111) and Co(0001) substrates 
 using first principles ab initio density functional theory based calculati
 ons. From our studies we find that\, on these substrates\, the Dirac cone 
 is destroyed\, there is a slight opening up of the band gap and an induced
  magnetic moment on the graphene sheet. The graphene sheet become ferrimag
 netic. Further we show that by systematically hydrogenating the graphene s
 heet\, it can be converted from ferri to ferromagnetic. Due to hydrogenati
 on of the graphene sheet\, the interaction of the the hydrogenated graphen
 e sheet with the substrate is enhanced\, resulting in charge transfer to t
 he substrate\, which in turn quenches the magnetic moment of the surface a
 toms drastically. We show that by intercalating an O layer between the hyd
 rogenated graphene sheet and the substrate\, one can alter the direction o
 f charge flow resulting in increase of the magnetic moment of the surface 
 Ni atoms by an order of magnitude. \n\n//indico.ictp.it/event/7465/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7465/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Universal covarianc
 e formula for linear statistics on random matrices"
DTSTART;VALUE=DATE-TIME:20150519T093000Z
DTEND;VALUE=DATE-TIME:20150519T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7458@ictp.it
DESCRIPTION:Abstract\nI present a universal fluctuation formula for linear
  statistics on random matrices. Given two linear statistics A = \\sum_j a
 (λ_j) and B = \\sum_j b(λ_j) on the N eigenvalues λ of a one-cut β-en
 semble of N x N random matrices\, I present a formula that gives the covar
 iance Cov(A\, B) in the limit N → ∞. The formula\, carrying the unive
 rsal 1/β prefactor\, depends on the random-matrix ensemble only through t
 he edge points [λ_−\,λ_+] of the limiting spectral density. For A = B
 \, one recovers in some special cases the classical variance formulas by B
 eenakker and Dyson-Mehta. I provide two applications - the joint statisti
 cs of conductance and shot noise in ideal chaotic cavities\, and a unified
  fluctuation relation for traces of powers of random matrices (related to 
 enumeration problems in combinatorics).\n \nReferences:\n \n[1] F. D. Cu
 nden and PV\, Phys. Rev. Lett. 113\, 070202 (2014) \n[2] F. D. Cunden\, F
 . Mezzadri and PV\, [arXiv:1504.03526] (2015)\n\n//indico.ictp.it/event/74
 58/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7458/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special seminar: "An optomechanical route to non-classicality"
DTSTART;VALUE=DATE-TIME:20150521T093000Z
DTEND;VALUE=DATE-TIME:20150521T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7459@ictp.it
DESCRIPTION:Abstract\n \n \nIn this talk\, I will review the current app
 roach to the manipulation and control of optomechanical systems at the qua
 ntum level.\nBy adopting a full open-system perspective\, I will illustrat
 e the key steps necessary to achieve quantum control of massive mechanical
  systems by optical drives\, and demonstrate the suitability of these devi
 ces to study non-equilibrium physics\, quantum networking\, and even exoti
 c collapse models.\n\n//indico.ictp.it/event/7459/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7459/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics seminar: "Many-body local
 ization and periodically driven systems"
DTSTART;VALUE=DATE-TIME:20150527T140000Z
DTEND;VALUE=DATE-TIME:20150527T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7471@ictp.it
DESCRIPTION:Abstract\n \nPeriodic driving of quantum systems provides a 
  natural experimental tool for probing and modifying their properties. In
  particular\, periodic driving has been recently used to realize topologic
 ally non-trivial band structures in optical lattices. Yet\, theoretically 
 relatively little is known about the general properties of driven interact
 ing systems.\n     In this talk\, I will present a theory of many-body 
 localized\, periodically driven many-body systems [1\,2]. I will show that
  many-body localization persists under periodic driving at high enough dri
 ving frequency. The Floquet operator (evolution operator over one driving 
 period) can be represented as an exponential of an effective time-independ
 ent Hamiltonian\, which is a sum of local terms and is itself MBL. The Flo
 quet eigenstates in this case have area-law entanglement entropy\, and the
 re exists an extensive set of local integrals of motion. I will further ar
 gue that at sufficiently low frequency\, there is always delocalization\, 
 owing to a large number of many-body level crossings and non-diabatic Land
 au-Zener transition between them. I will propose a phase diagram of driven
  MBL systems. Our results provide new experimental signatures of many-body
  localization\, and indicate breakdown of the linear-response theory and c
 lassic Mott formula for AC conductivity in localized systems. I will close
  by discussing periodically driven ergodic (delocalized) systems\, and\, i
 n particular\, will derive general strong upper bounds on their heating ra
 tes. \n \n[1] D. A. Abanin\, W. De Roeck\, F. Huveneers\, "A theory of m
 any-body localization in periodically driven systems"\, arXiv:1412.4752 (2
 014). \n[2] P. Ponte\, Z. Papic\, F. Huveneers\, D. A. Abanin\, "Many-bod
 y localization in periodically driven systems"\, arXiv:1410.8518 (2014)\, 
 PRL\, in press.\n \n\n//indico.ictp.it/event/7471/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7471/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Chemical Physics: "Clusters and superatoms on 
 substrates: Adsorption\, diffusion and assemblies"
DTSTART;VALUE=DATE-TIME:20150608T123000Z
DTEND;VALUE=DATE-TIME:20150608T133000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7477@ictp.it
DESCRIPTION:\n	Abstract\n\nIn the first part of my talk I will introduce t
 he idea of atomic clusters as superatoms and magnetic superatoms\, and wil
 l present two classes of binary metal clusters that behave as magnetic sup
 eratoms. I will then explore\, using electronic structure calculations\, t
 he right substrate for assembly of a particular magnetic superatom FeCa8. 
 In the later part of my talk I will show some results on adsorption and di
 ffusion of silver clusters on clean and stepped graphite substrates. These
  results give atomistic insights into some of the experimental observation
 s on these systems.\n\n//indico.ictp.it/event/7477/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7477/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics seminar: "Pushing nanopar
 ticles: From superlubric sliding to tiny earthquakes"
DTSTART;VALUE=DATE-TIME:20150610T140000Z
DTEND;VALUE=DATE-TIME:20150610T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7476@ictp.it
DESCRIPTION:\n	Abstract\n \nIn an effort to reduce the friction between s
 liding components scientists and engineers have developed a multitude of l
 ubrication schemes. In the field of dry lubrication the idea of superlubri
 city\, i.e. the state of (almost) vanishing friction\, has received widesp
 read attention lately. One of the most intriguing concepts in this framewo
 rk is referred to as `structural lubricity'\, where flat surfaces are thou
 ght to slide past each other virtually frictionless if their atomic struct
 ures are incommensurate. In this talk\, we analyze the fundamental mechani
 sms that govern the area-dependence of friction in extended but atomically
  flat contacts of dissimilar materials. The resulting sublinear power laws
 \, which link mesoscopic friction to atomic principles\, are then confirme
 d by measuring the sliding resistance of gold and antimony particles on gr
 aphite [1]. On one hand these findings suggest that engineering surfaces w
 ith very low friction can be realized up to mesoscopic contact areas. Furt
 hermore\, it is shown that nanoparticles can even co-exist in two friction
 al states\, exhibiting ‘frictional duality’: Some particles show linea
 r scaling with contact area reminiscent of Amonton’s friction law while 
 others remain in the superlow friction state of structural lubricity [2]. 
 This duality phenomenon is explained by a model of partial interface conta
 mination. Lastly\, we investigated the effect of contact ageing\, detrimen
 tal in the field of earthquake modelling: The shear strength of tectonic p
 lates is believed to increase logarithmic in time\, leading to the infamou
 s strong sudden energy dissipation events\, i.e. earthquakes. Interestingl
 y\, we find that similar ageing dynamics exist for nanoparticles\, as evid
 enced by stick-slip movements of those objects. A complex interplay of age
 ing dynamics with thermally activated stick-slip friction explains the com
 monly observed friction peak at low temperatures [3].\n \n[1] D. Dietzel 
 et al.\, Physical Review Letters 111 (2013) 235502\n[2] D. Dietzel et al.\
 , Physical Review Letters 101 (2008) 125505\n[3] M. Feldmann et al.\, Phys
 ical Review Letters 112 (2014) 155503\n\n//indico.ictp.it/event/7476/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7476/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Multimode Kapitza-D
 irac interferometry with trapped cold atoms"
DTSTART;VALUE=DATE-TIME:20150619T140000Z
DTEND;VALUE=DATE-TIME:20150619T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7494@ictp.it
DESCRIPTION:Abstract\nWe present one novel suggestion to realize a multimo
 de interferometer with atoms confined in a harmonic trap. A first Kapitza-
 Dirac pulse creates several spatially addressable modes which are coherent
 ly recombined by the harmonic potential and mixed again by a second Kapitz
 a-Dirac pulse. A phase shift among the mode is estimated by fitting the de
 nsity profile or by measuring the number of atoms in each output mode. The
  expected sensitivity is rigorously calculated with the Fisher information
  and the Cramer-Rao lower bound. For the measurement of the gravitational 
 accelaration $g$ we predict\, with typical parameters of a compact setup\,
  a temperature independent sensitivity which can exceed by different order
  of magnitudes the sensitivity of current atomic interferometers.\n \nRef
 erence: Phys. Rev. Lett. 113\, (2014) 023003.\n\n//indico.ictp.it/event/74
 94/
LOCATION:SISSA Room 138 (first floor)
URL://indico.ictp.it/event/7494/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Informal seminar on Chemical Physics: "The thermodynamics of  conf
 ined water and other stories"
DTSTART;VALUE=DATE-TIME:20150622T123000Z
DTEND;VALUE=DATE-TIME:20150622T133000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7495@ictp.it
DESCRIPTION:Abstract\n \nClassical thermodynamics is assumed to be valid 
 up to a certain length-scale\, below which the discontinuous nature of mat
 ter becomes manifest\, and the macroscopic theory breaks down. This is the
  so called thermodynamic limit. In this seminar we will present results fo
 r the vapor pressure and contact angle of water in different nano environm
 ents\, obtained from canonical and grand canonical molecular dynamics simu
 lations\, showing that the applicability of the master thermodynamic equat
 ions extends to unexpectedly small lengths\, of only 1 or 2 nm.\nIn partic
 ular\, we will focus on the hydrophobicity of chemically heterogeneous sur
 faces\, consisting of binary mixtures of hydrophilic and hydrophobic parti
 cles. The combination gives rise to a linear dependence of hydrophobicity 
 with respect to composition\, in agreement with the thermodynamic Cassie m
 odel. When the length-scale of the heterogeneity reaches the molecular dim
 ensions\, however\, unprecedented deviations from linearity occur\, and th
 e hydrophobicity of the mixture may exceed that of the  pure hydrophobic 
 component.\n \n[1] J. Am. Chem. Soc. 136\, 4508 (2014).\n[2] J. Chem. Phy
 s. 140\, 064111 (2014).\n\n//indico.ictp.it/event/7495/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7495/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "On the Sine Gordon 
 model"
DTSTART;VALUE=DATE-TIME:20150626T090000Z
DTEND;VALUE=DATE-TIME:20150626T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7496@ictp.it
DESCRIPTION:Abstract\n \nSome aspects of the quantum Sine Gordon model ar
 e analyzed\, in particular the mass formula that relates kink's mass with 
 the coupling constants and the computation of Vacuum Expectation Values.\n
  This is an exam talk to the course: Quantum Statistical Physics and Fie
 ld Theory\n\n//indico.ictp.it/event/7496/
LOCATION:SISSA\, Santorio Building Room 138 (first floor)
URL://indico.ictp.it/event/7496/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Monodromic vs holog
 raphic computation of Virasoro classical conformal blocks"
DTSTART;VALUE=DATE-TIME:20151006T090000Z
DTEND;VALUE=DATE-TIME:20151006T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7708@ictp.it
DESCRIPTION:Abstract\nWe study holographic interpretation of classical con
 formal blocks in terms of particles propagating in AdS3 geometry. We cons
 ider n-point block with two heavy and n-2 light fields and describe the 
 corresponding bulk configuration\, which consists of n-3 particles propag
 ating in the conical defect background produced by the heavy fields. We 
 test the general picture in the case of five points. Using the monodromic
  approach we compute 5-point classical block and find the exact correspon
 dence with the bulk world line action. The analysis relies upon the spec
 ial perturbative procedure which treats n-point case as a deformation of
  (n-1)-pt case.\n\n//indico.ictp.it/event/7708/
LOCATION:SISSA\, Santorio Building Room 138\, first floor
URL://indico.ictp.it/event/7708/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Conformal invarianc
 e and many-points correlation functions in percolation models"
DTSTART;VALUE=DATE-TIME:20151013T090000Z
DTEND;VALUE=DATE-TIME:20151013T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7714@ictp.it
DESCRIPTION:Abstract\nThe geometrical nature of two-dimensional critical p
 oints is encoded in the connectivity properties of random clusters. We dis
 cuss about recent results on the bulk three-point connecitivities which we
 re at the origin of the recent extension of the Liouville theory to values
  of the central charge c<=1. Moreover\, we present analytical and numerica
 l analysis of the four-point connectivities of random cluster. In particul
 ar we show a new result in the pure percolation theory which has a clear i
 nterpretation in terms of the (unknown) bulk conformal field theory behind
 .\n\n//indico.ictp.it/event/7714/
LOCATION:SISSA\, Santorio Building Room 138\, first floor
URL://indico.ictp.it/event/7714/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Energy bounds for i
 nteracting Bose gases"
DTSTART;VALUE=DATE-TIME:20151014T090000Z
DTEND;VALUE=DATE-TIME:20151014T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7713@ictp.it
DESCRIPTION:Abstract\nIn 1975\, Lieb and Thirring gave an elegant and usef
 ul combination of the uncertainty and the exclusion principles of quantum 
 mechanics\, proving a lower bound for the kinetic energy of a fermionic ma
 ny-particle wave function in terms of its local particle density. Together
  with J. P. Solovej\, we have extended such a bound to apply to more gener
 al identical particles\, whose quantum statistics can be modeled using bos
 ons with a local repulsive interaction\, such as anyons in two dimensions.
  In this talk I consider the generalization and application of similar ene
 rgy bounds to a large family of pair-interacting Bose gases\, including so
 me recent work with P. T. Nam and F. Portmann concerning the relativistic 
 case.\n\n//indico.ictp.it/event/7713/
LOCATION:SISSA\, Santorio Building Room 138\, first floor
URL://indico.ictp.it/event/7713/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Chemical Physics Seminar: Twists of Chirality for the Self-Assembl
 y of Short Peptide Superstructures
DTSTART;VALUE=DATE-TIME:20151109T100000Z
DTEND;VALUE=DATE-TIME:20151109T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7737@ictp.it
DESCRIPTION:\n	Self-assembly of small molecules into hydrogels is a hot to
 pic of research that still presents many unanswered questions. In particul
 ar\, tripeptides are very appealing building blocks that are simple to pre
 pare and can encode powerful biological messages. However\, prediction of 
 their self-assembly behaviour is still a very challenging objective. Among
 st the different tools that can be used to drive self-organisation\, appro
 priate choice of chirality to fine-tune tripeptide molecular shape is an a
 ttractive yet mostly unexplored approach. A different configuration at one
  stereocenter of simple hydrophobic sequences is sufficient to determine d
 ramatic effects at macroscopic level (i.e.\, leading or not to a hydrogel 
 within seconds). Importantly\, specific nanostructure morphologies (e.g.\,
  nanotapes\, twisted fibers) can be achieved through subtle molecular vari
 ations. The resulting assemblies hold high potential as biomaterials\, as 
 shown by their performance in vitro. This approach opens a number of innov
 ative avenues\, for example\, through co-assembly with other molecules tha
 t actively participate in the superstructure.\n\n//indico.ictp.it/event/77
 37/
LOCATION:ICTP Leonardo Building - Euler Lecture Hall
URL://indico.ictp.it/event/7737/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Controlling Magnetism at the Nanoscale on Metallic and Semi-insula
 ting Surfaces
DTSTART;VALUE=DATE-TIME:20151110T150000Z
DTEND;VALUE=DATE-TIME:20151110T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7735@ictp.it
DESCRIPTION:\nUltimate control over magnetic properties of nano-scale surf
 ace structures has been one of the holy grails of the surface-science comm
 unity for quite some time. Among the many ways of achieving this control I
  would like to highlight a few pertaining to metallic and semi-insulating 
 surfaces.\n\nFor metallic surfaces I shall concentrate of the possibility 
 to control surface magnetism with charge doping and external electric fiel
 d (EEF) application\, showing that (i) magneto-electric coupling via EEF-b
 ased charge manipulation is a way to tailor single adatom spins\, exchange
  interaction between adsorbates or anisotropies of chains and layered syst
 ems [1-3]\; (ii) the effect of EEF can be enhanced by immersing the target
  system into an electrolyte or ionic liquid [1\,4] and (iii) that similar 
 physics can be found in charge traps\, metallic systems decoupled from a b
 ulk electron bath. [1\,5]\n\nAs powerful tools often turn out to have thei
 r drawbacks and side effects\, also the use of substrate electrons' manipu
 lation for tailoring magnetism at the nanoscale often unfavorably affect t
 he dynamics and non-ground-state properties of nanostructures due to the e
 lectron scattering from the substrate's vast electron bath.\n\nI would arg
 ue\, that a compromise can be found in the use of semi-insulating substrat
 es\, such as thin layers of CuN\, MgO of BN on a metallic support. As an e
 xample I shall show that (i) electric field can also be used on such surfa
 ces to tailor the exchange-coupling of magnetic adatoms on MgO/Ag(001) and
  that (ii) control over the nanostructure-substrate coupling in conjunctio
 n with hydrogenation opens up a possibility to tune the spins of single Co
  adatoms on corrugated hexagonal boron nitride supported on Rh(111) [6]\n\
 n[1] O. Brovko\, P. Ruiz-Di­az\, T.R. Dasa\, and V.S. Stepanyuk\, J. Phys
 . Cond. Matter 26\, 093001 (2014)\n[2] N. Negulyaev\, V.S. Stepanyuk\, W. 
 Hergert\, and J. Kirschner\, Phys. Rev. Lett. 106\, 037202 (2011)\n[3] T.R
 . Dasa\, P.A. Ignatiev\, and V.S. Stepanyuk\, Phys. Rev. B 85\, 205447 (20
 12)\n[4] L. Juarez-Reyes\, G.M. Pastor\, and V.S. Stepanyuk\, Phys. Rev. B
  86\, 235436 (2012)\n[5] P. Ruiz-Di­az\, T.R. Dasa\, and V. S. Stepanyuk\
 , Phys. Rev. Lett. 110\, 267203 (2013)\n[6] P. Jacobson\, T. Herden\, M. M
 uenks\, G. Laskin\, O. Brovko\, V. Stepanyuk\, M. Ternes\, and K. Kern\, N
 ature Commun. 6\, 8536 (2015)\n\n//indico.ictp.it/event/7735/
LOCATION:ICTP Leonardo Building - Euler Lecture Hall
URL://indico.ictp.it/event/7735/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics seminar: "Synthetic Magnetic 
 Fields for Atoms and Photons"" 
DTSTART;VALUE=DATE-TIME:20151110T100000Z
DTEND;VALUE=DATE-TIME:20151110T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7740@ictp.it
DESCRIPTION:\n	I will present recent results of our group in the rapidly d
 eveloping field of synthetic magnetic fields for atoms and photons\, in co
 ld atomic gases and photonic structures\, respectively. The results can be
  categorized in three closely related groups.\n	(i) It will be shown that 
 a Hamiltonian with Weyl points can be realized for ultracold atoms using l
 aser-assisted tunneling in three-dimensional optical lattices [1]. Weyl po
 ints are synthetic magnetic monopoles that exhibit a robust\, three-dimens
 ional linear dispersion\, identical to the energy-momentum relation for re
 lativistic Weyl fermions\, which are not yet discovered in particle physic
 s. Weyl semimetals are a promising new avenue in condensed matter physics 
 due to their unusual properties such as 'Fermi arc' surface states. Howeve
 r\, experiments on Weyl points are highly elusive. We show that this elusi
 ve goal is well-within experimental reach with an extension of techniques 
 recently used in ultracold gases.\n	(ii) We present a grating assisted tun
 neling scheme for tunable synthetic magnetic fields in photonic lattices. 
 The synthetic fields emerge from the nontrivial phases of the resulting tu
 nneling matrix elements. We propose implementation of the Harper-Hofstadte
 r Hamiltonian in these photonic lattices\, and demonstrate its realization
  by using the so-colled conical diffraction [2].\n	(iii) Finally\, we pres
 ent a novel theoretical proposal [3]\, and the experimental demonstration 
 [4]\, of synthetic magnetic fields that were for the first time achieved i
 n classical cold atomic gases. The scheme utilizes radiation pressure forc
 es and the Doppler effect. The experiment was implemented in the 87Rb Magn
 eto-Optical Trap [4].\n	REFERENCES\n	1. Tena Dubcek\, Colin J. Kennedy\,
  Ling Lu\, Wolfgang Ketterle\, Marin Soljacic\, Hrvoje Buljan\, Weyl point
 s in three-dimensional optical lattices: Synthetic magnetic monopoles in m
 omentum space\, Phys. Rev. Lett. 114\, 225301 (2015).\n	2. Tena Dubcek\,
  et al.\, submitted\n	3. T. Dubcek\, N. Santic\, D. Jukic\, D. Aumiler\, T
 . Ban\, and H. Buljan\, Synthetic Lorentz force in classical atomic gases 
 via Doppler effect and radiation pressure\, Phys. Rev. A 89\, 063415 (2014
 ).\n	4. Neven Santic\, Tena Dubcek\, Damir Aumiler\, Hrvoje Buljan\, Tic
 ijana Ban\, Experimental Demonstration of a Synthetic Lorentz Force by Usi
 ng Radiation Pressure\, Scientific Reports 5\, 13485 (2015).\n\n//indico.i
 ctp.it/event/7740/
LOCATION:SISSA\, Room 128\, 1st floor
URL://indico.ictp.it/event/7740/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Spin Transport in U
 ltracold Fermi Gases"
DTSTART;VALUE=DATE-TIME:20151117T100000Z
DTEND;VALUE=DATE-TIME:20151117T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7744@ictp.it
DESCRIPTION:\n	Many strongly correlated quantum fluids exhibit universal t
 ransport properties\, notably a famous quantum bound on the internal frict
 ion. In this talk I will discuss transport in a unitary Fermi gas: strong-
 coupling computations show that the shear viscosity\, which determines fri
 ction\, signals almost perfect fluidity in the quantum degenerate regime.
   Similarly\, spin diffusion becomes slower at strong interaction and rea
 ches a quantum limit\, in agreement with a recent experiment at MIT.  In 
 the case of transverse spin diffusion the spin current will also precess a
 round the local magnetization.  This Leggett-Rice effect has now been obs
 erved and provides new insight into the effective interaction in a unitary
  Fermi gas.\n	[1] Enss\, Haussmann & Zwerger\, Ann. Phys. 326\, 770 (2011)
 .\n	[2] Enss & Haussmann\, Phys. Rev. Lett. 109\, 195303 (2012).\n	[3] Bau
 er\, Parish & Enss\, Phys. Rev. Lett. 112\, 135302 (2014).\n	[4] Trotzky\,
  Beattie\, Luciuk\, Smale\, Bardon\, Enss\, Taylor\, Zhang &\n	Thywissen\,
  Phys. Rev. Lett. 114\, 015301 (2015).\n\n//indico.ictp.it/event/7744/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7744/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Entanglement and th
 e Kondo Problem"
DTSTART;VALUE=DATE-TIME:20151124T100000Z
DTEND;VALUE=DATE-TIME:20151124T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7750@ictp.it
DESCRIPTION:\n	The 2-channel Kondo model has a non-Fermi liquid ground sta
 te with a degeneracy of g=square root of 2. Following a prediction of Cala
 brese and Cardy\, ln g is expected to appear as a term in the entanglement
  entropy. The Kondo model also exhibits an exponentially large "screening 
 cloud".  I will present an intuitive picture in terms of resonating valen
 ce bonds\, and numerical evidence from DMRG\,  for how both ln g and the 
 screening cloud size show up in the entanglement entropy.\n\n//indico.ictp
 .it/event/7750/
LOCATION:SISSA Building\, room 128\, first floor
URL://indico.ictp.it/event/7750/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Seeing Asymptotic F
 reedom in an Exact Large-N Correlator
DTSTART;VALUE=DATE-TIME:20151130T100000Z
DTEND;VALUE=DATE-TIME:20151130T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7754@ictp.it
DESCRIPTION:\n	The sigma model of a field in SU(N) in 1+1 dimensions 1) is
  asymptotically free and 2) has applications in the study of gauge theorie
 s (massive gauge theory in 1+1 dimensions\, q-qbar potentials in 2+1-dimen
 sional Yang-Mills). The large-N Feynman diagrams of this sigma model are p
 lanar\, hence mean-field/saddle-point methods do not work. Exact correlato
 rs were eventually found by combining large-N methods with the form-factor
  boot- strap. Until recently\, the behavior of these expressions was known
  in the infrared\, but not tested in the ultraviolet. In this talk\, I wil
 l describe the asymptotic ultraviolet form of the two-point function $C(x)
 $ of the scaling field. Although no perturbation theory was used in its de
 rivation\, its form: $C(x)\\approx C_{2}\\ln^{2}(mx)$ confirms the result 
 of the perturbative renormalization group. The coefficient $C_{2}$ is $1/1
 6\\pi=0.01989$.\n\n//indico.ictp.it/event/7754/
LOCATION:SISSA\, Room 128\, first floor
URL://indico.ictp.it/event/7754/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Strong Zero Modes a
 nd Eigenstate Phase Transitions
DTSTART;VALUE=DATE-TIME:20151215T100000Z
DTEND;VALUE=DATE-TIME:20151215T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7762@ictp.it
DESCRIPTION:\n	Abstract:\n	Gapless edge or zero modes surviving the presen
 ce of disorder are common in a topological phase of matter. "Weak" zero mo
 des\, guaranteeing ground-state degeneracy\, necessarily survive throughou
 t a topological phase\,  A more dramatic effect occurs in the Ising chain
 /Majorana wire:  "strong'' edge zero modes result in identical spectra in
  even and odd fermion-number sectors\, up to exponentially small finite-si
 ze corrections. There is a presumption that disorder is necessary to stabi
 lize strong zero modes in the presence of interactions\, but I show that t
 heir presence in a clean system is not a free-fermionic fluke. In this tal
 k I display explicitly a strong zero mode in the XYZ chain/coupled Majoran
 a wires\; this operator possesses some remarkable structure apparently unk
 nown in the integrability literature.  I also present evidence for strong
  zero modes in the parafermionic cae\, implying the existence of an  unco
 nventional "eigenstate phase transition'' where the strong zero mode disap
 pears\, leaving only the weak one.\n\n//indico.ictp.it/event/7762/
LOCATION:SISSA Building Room 128
URL://indico.ictp.it/event/7762/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Workshop: "From Intermolecular Forces to Frontiers in Nanoscience 
 and Nanomedicine"
DTSTART;VALUE=DATE-TIME:20160120T083000Z
DTEND;VALUE=DATE-TIME:20160122T173000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7764@ictp.it
DESCRIPTION:\n	This Workshop is in honor of Giacinto Scoles.\n	The aim of 
 the workshop is to celebrate the scientific career of Giacinto Scoles in t
 he fields of Physical Chemistry\, Biophysics\, Nanotechnology\, and Nanome
 dicine\, and to recognize his two souls (experimental and theoretical). Th
 e invited speakers are representatives of the close relatives (siblings\, 
 children and grandchildren) within Giacinto's large scientific family. We 
 hope that the audience will be able to recognize in their presentation of 
 the state-of-the-art in one of the above fields a piece of Giacinto's mind
  and spirit.\n\nVenue:  ICTP\, Adriatico Guesthouse\, Giambiagi Lecture H
 all\nTENTATIVE PROGRAMME:\nWednesday\, 20 January 2016\n9:30-10:00 Welcome
  Ceremony\n10:00-11:00 Inaugural Talk Y.T. LEE\n11:00-11:20 Coffee break\n
 11:20-12:10 A. DIASPRO\n12:10-13:00 M. HAVENITH\n13:00-14:00 Lunch\n14:00-
 14:50 M. PRATO\n14:50-15:30 N. ELVASSORE\n15:30-16:10 S. KROL\n16:10-16:50
  M. MORGANTE\n16:50-17:10 Coffee break\n17:10-18:00 R. ELLIS-BEHNKE\n18:00
 -18:50 A. LAIO\n18:50-19:30 F. DEL BEN\n19:30-21:00 Reception with Poster 
 Session\nThursday\, 21 January 2016\n9:00 -9:50 F. STELLACCI\n9:50-10:40 L
 . FRUK\n10:40-11:00 Coffee break\n11:00-11:50 R. ROUSSEAU\n11:50-12:30 F. 
 TOMA\n12:30-13:10 D. COJOC\n13:10-14:10 Lunch\n14:10-15:00 F. SCHREIBER\n1
 5:00-15:40 A. MORGANTE\n15:40-16:20 K. LEHMAN\n16:20-16:40 Coffee break\n1
 6:40-17:30 G-Y. LIU\n17:30-18:10 H-L. DAI\n18:10-18:50 A. DE MARCO\nFriday
 \, 22 January 2016\n9:00-9:50 R. CAR\n9:50-10:40 O. AKIN-OJO\n10:40-11:00 
 Coffee break\n11:00-11:50 M. FERMEGLIA\n11:50-12:40 A. SELLONI\n12:40-13:3
 0 E. TOSATTI\n13:30-14:30 Lunch\n14:30-15:20 M. PARRINELLO\n15:20-16:10 M.
 B. NARDELLI\n16:10 -16:30 Coffee break\n16:30-17:20 F. STIENKEMEIER\n17:20
 -18:10 U. BUCK\n18:10 Conclusive Remarks: G. SCOLES\n\n//indico.ictp.it/ev
 ent/7764/
LOCATION: Adriatico Guest House - Giambiagi Lecture Hall
URL://indico.ictp.it/event/7764/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Condensation of Lar
 ge Fluctuations in a Statistical System"
DTSTART;VALUE=DATE-TIME:20160126T100000Z
DTEND;VALUE=DATE-TIME:20160126T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7773@ictp.it
DESCRIPTION:\n	Abstract: Condensation is the phenomenon whereby a finite f
 raction of some quantity\, e.g. a particle density\, concentrates into a s
 mall region of phase-space\, as in the paradigmatic example of a vapor tra
 nsforming into a liquid when crossing a phase-transition. Condensation is 
 observed in a number of different models\, related to magnetic properties\
 , gravity\, mass transport\, bosonic properties etc... In this case conden
 sation is a property of the typical state of the system\, that is to say i
 t is observed by monitoring average properties.\n	A different manifestatio
 n of condensation is observed when probability distributions of a fluctuat
 ing collective variable\, such as the number of particles in a thermodynam
 ic system\, are considered. In this case\, a fluctuation well above the ty
 pical value can be associated to a condensed configuration of the system. 
 This phenomenon\, referred to as condensation of fluctuations\, was observ
 ed for quantities as diverse as particle number\, energy\, exchanged heats
 \, particles currents etc... This phenomenon is distinct\, in principle\, 
 from the usual "condensation on average"\, despite a unified mathematical 
 description is possible in many cases.\n	In this talk I will discuss the p
 henomenon of condensation of fluctuations on general grounds by considerin
 g some examples taken from paradigmatic models of Statistical Physics.\n\n
 //indico.ictp.it/event/7773/
LOCATION:SISSA Building\, Room 128\, first floor
URL://indico.ictp.it/event/7773/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminars in Condensed Matter and Statistical Physics: "Using 
 Lindblad Master Equations to Study Many-body Physics"
DTSTART;VALUE=DATE-TIME:20160128T103000Z
DTEND;VALUE=DATE-TIME:20160128T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7771@ictp.it
DESCRIPTION:\n	Abstract: In recent years quantum master equations of the L
 indblad type are receiving increased attention in different fields of phys
 ics. In quantum information they are seen as a resource that can be used t
 o perform quantum operations\, in statistical physics they form a well def
 ined setting for nonequilibrium physics\, while in condensed matter they c
 an be used simply as a tool with which one can probe system's properties.
   I will first review basics of the Lindblad setting and then present som
 e concrete results about steady states of many-body systems. The problem o
 f quantum transport in low-dimensional systems will be presented and some 
 findings obtained via nonequilibrium Lindblad setting outlined. I will als
 o touch on the problem of localization in interacting systems -- the so-ca
 lled many-body localization.\n\n//indico.ictp.it/event/7771/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7771/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Short-Time Universa
 lity and Aging in Isolated Quantum Systems"
DTSTART;VALUE=DATE-TIME:20160202T100000Z
DTEND;VALUE=DATE-TIME:20160202T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7783@ictp.it
DESCRIPTION:\n	Abstract: The non-equilibrium dynamics of an isolated quant
 um system after a sudden quench to a dynamical critical point is expected 
 to be characterized by scaling and universal exponents due to the absence 
 of time scales. We explore these features for a quench of the parameters o
 f a Hamiltonian with O(N) symmetry\, starting from the ground state of the
  disordered phase. In the limit of large N\, the exponents and scaling for
 ms of the relevant two-time correlation functions can be calculated exactl
 y. For generic N\, we use a perturbative renormalization-group approach to
  compute such exponent\, to leading order in a dimensional expansion.\n\n/
 /indico.ictp.it/event/7783/
LOCATION:SISSA\, room 128\, first floor
URL://indico.ictp.it/event/7783/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Condensed Matter Seminar: "Quantum Batteries\, Quantum Spe
 ed Limits\, and Powerful Unitary Driving
DTSTART;VALUE=DATE-TIME:20160205T103000Z
DTEND;VALUE=DATE-TIME:20160205T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7770@ictp.it
DESCRIPTION:\nAbstract:\n\nThe speed of quantum evolution is bounded by th
 e quantum speed limits (QSLs) which may be formulated in terms of properti
 es of the driving Hamiltonian (in particular\, its variance). QSLs will be
  introduced and used to motivate the study of quantum power. Defining the 
 notion of a quantum battery the question of achieving high driving power i
 s then phrased in terms of powerful battery charging. For the simplest pos
 sible model of a quantum battery -- a work qubit (or 'wit') -- an optimal 
 charging protocol may be derived. Extending the analysis to an array of N 
 qubits\, it is demonstrated that an N-fold advantage in power per wit can 
 be achieved when global operations are permitted (rather than a restrictio
 n to local operations and classical communication (LOCC)). Interestingly\,
  this quantum advantage for power holds even when\, with cyclic operation 
 in mind\, initial and final states are required to be separable. The exemp
 lary analytic argument for this quantum advantage in the charging power is
  explained by a geometric argument on the one side and a re-consideration 
 of the applicable quantum speed limit on the other.\n\n\n//indico.ictp.it/
 event/7770/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7770/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Supersymmetric latt
 ice models: the field theory connection"
DTSTART;VALUE=DATE-TIME:20160209T100000Z
DTEND;VALUE=DATE-TIME:20160209T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7790@ictp.it
DESCRIPTION:\n	Abstract:\n\nThis talk is about a series of supersymmetric 
 lattice models called the Mk models. The focus will be on the M2 model on 
 a one-dimensional lattice. In this model a maximum of two neighbouring sit
 es can be  occupied by spinless fermions.  At the critical point the Mk mo
 del corresponds to the k-th N=2 superconformal minimal model. By introduci
 ng boundary defects on the lattice\, all fields in the CFT can be identifi
 ed. The Mk models can be tuned off-criticality by a staggering perturbatio
 n. For the right values of the staggering parameters the Mk models are int
 egrable. We find that the M2 model perturbed by an integrable staggering c
 orresponds to the supersymmetric sine-Gordon model at the point where ther
 e is an additional N=2 supersymmetry. In a limit of `extreme staggering'. 
 We are able to compare the kinks in between the M2 model ground states to 
 the solitons of the supersymmetric sine-Gordon model.\n\n//indico.ictp.it/
 event/7790/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/7790/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Seminar in Condensed Matter Physics and Statistical Physic
 s: "Optical properties of two-dimensional materials: from absorption to Ra
 man spectroscopy with DFT"
DTSTART;VALUE=DATE-TIME:20160210T103000Z
DTEND;VALUE=DATE-TIME:20160210T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7789@ictp.it
DESCRIPTION:\n	Abstract:\n\nDuring the last decade\, novel two-dimensional
  (2D) semiconducting materials have been synthesized and characterised. As
  a result\, there have been several theoretical and experimental proposals
  to incorporate 2D materials for designing next generation electronic and 
 optoelectronic devices. In particular\, it has been demonstrated that ligh
 t absorption in phosphorus-based monolayers can span the whole visible spe
 ctrum\, suggesting they could be used for optolectronic applications. A ke
 y ingredient for optical applications is the presence of excitons and thei
 r subsequent diffusion along a donor material. This is influenced by the c
 haracter of the different excitations taking place\, as well as\, the exci
 ton binding energy. At the same time the anisotropic character of black ph
 osphorus can give rise to interesting optical responses depending on the p
 olarization\, and even more so at the edges of the sample. This could inte
 resting phenomena such as unusual thermal conductivity at the edges of the
  material compared to the bulk.\n\nTherefore\, In this work we use accurat
 e density functional theory calculations to probe the optical response of 
 different phosphorus allotropes. First\, by means of GW-BSE methodology to
  we elucidate the most important optical transitions\, exciton energy spec
 trum as well as exciton extension in di fferent types of phosphorene mater
 ials. In addition\, we solve the Schrodinger equation for different 2D scr
 eened potentials in a hydrogenic model and estimate the 2D exciton energy 
 levels and radius extension. Finally\, we also study the Raman spectrum on
  the edges of black phosphorene to show the presence of forbidden Raman mo
 des seen in experiments\, which arise from edge reconstruction.\n\n//indic
 o.ictp.it/event/7789/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7789/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Seminar in Condensed Matter Physics: "Universal signatures
  of Fermi arcs in quasiparticle interference on the surface of Weyl semime
 tals"
DTSTART;VALUE=DATE-TIME:20160211T123000Z
DTEND;VALUE=DATE-TIME:20160211T143000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7791@ictp.it
DESCRIPTION://indico.ictp.it/event/7791/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7791/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Fast Irreversible M
 onte Carlo Simulations Beyond the Metropolis Paradigm: Applications to Int
 eracting Particles and to Spin Systems".
DTSTART;VALUE=DATE-TIME:20160216T100000Z
DTEND;VALUE=DATE-TIME:20160216T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7803@ictp.it
DESCRIPTION:\nAbstract:\nI show how the lifting principle and a new pairwi
 se decomposition of the Metropolis filter allows one to design a class of 
 powerful rejection-free Markov-chain Monte Carlo algorithms that break det
 ailed balance yet satisfy detailed balance. These algorithms generalize ou
 r recent hard-sphere event-chain Monte Carlo method. The new approach brea
 ks with all the three paradigms of common Markov-chain methods: 1) Moves a
 re infinitesimal rather than finite\; 2) Detailed balance is broken yet gl
 obal balance is satisfied\; 3) Rejections are replaced by liftings\, and m
 oves are persistent.\n\nAs an application\, I demonstrate considerable spe
 ed-up of the event-chain algorithm for particle systems and for spin model
 s and sketch extensions to the simulation of quantum systems and the treat
 ment of long-range systems without cutoffs or Ewald summations.\n\nTo illu
 strate the results that were obtained with these algorithms\, I will discu
 ss our new understanding of two-dimensional melting.\n\nE. P. Bernard\, W.
  Krauth\, D. B. Wilson Phys.Rev. E 80 056704 (2009).\nE. P. Bernard\, W. K
 rauth Phys. Rev. Lett. 107\, 155704 (2011).\nM. Michel\, S. C. Kapfer\, W.
  Krauth J. Chem. Phys. 140 54116 (2014).\nS. C. Kapfer\, W. Krauth Phys. R
 ev. Lett. 114\, 035702 (2015).\n\n//indico.ictp.it/event/7803/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/7803/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 An Overview of Quantum Fluids of Light: First Successes and Many Exciting 
 Perspectives"
DTSTART;VALUE=DATE-TIME:20160217T140000Z
DTEND;VALUE=DATE-TIME:20160217T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7794@ictp.it
DESCRIPTION:\nAbstract:\n\n	I will begin with an introduction to the basic
  concept of quantum fluid of light when a many photon beam propagating in 
 a nonlinear medium starts displaying a collective behavior as a fluid of m
 any interacting particles. After reviewing the key experiments demonstrati
 ng Bose-Einstein condensation and superfluidity properties in such fluids\
 , I will present some among the most exciting new directions of theoretica
 l and experimental research in this field\, namely quantum hydrodynamics i
 n acoustic black hole configurations\, quantum magnetism and synthetic dim
 ensions for light\, and conservative quantum dynamics in paraxial propagat
 ion.\n\n//indico.ictp.it/event/7794/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7794/
END:VEVENT
BEGIN:VEVENT
SUMMARY:INFORMAL SEMINAR in Condensed Matter and Statistical Physics on: "
 Electro-Mechanical Effects in Single-Electron Molecular Transistors"
DTSTART;VALUE=DATE-TIME:20160219T103000Z
DTEND;VALUE=DATE-TIME:20160219T120000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7809@ictp.it
DESCRIPTION:\n	Abstract:\n	The aim of this informal seminar is to review d
 ifferent aspects of electron transport through nanoelectromechanical syste
 ms\, i.e. devices of nanometers size in which coupling between the electri
 cal and mechanical degrees of freedom is realized. By using the simplest m
 odel I will consider the main vibrational effects in electronic normal and
  superconducting transport\, showing comparisons with experiments. Finally
  I will introduce a spectacular vibrational effect called electron shuttli
 ng which strongly enhances the current.\n\n//indico.ictp.it/event/7809/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7809/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Fluctuation Induced
  Interactions In and Out of Equilibrium"
DTSTART;VALUE=DATE-TIME:20160222T133000Z
DTEND;VALUE=DATE-TIME:20160222T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7807@ictp.it
DESCRIPTION:\n	Abstract:\n	Fluctuations of a medium lead to interactions b
 etween embedded objects. Such interactions\, first predicted for the (quan
 tum) electromagnetic field by Hendrik Casimir more than 60 years ago\, hav
 e in recent years attracted considerable attention in a variety of systems
 \, including also soft matter.  In this presentation\, I will mostly focu
 s on objects in vacuum that interact via electromagnetic fields\, especial
 ly emphasizing the properties and theoretical concepts for systems in non-
 equilibrium situations: The interactions (forces) between objects at diffe
 rent temperatures allow for a variety of effects that are ruled out in equ
 ilibrium. In this non-equilibrium situation\, the objects also exchange en
 ergy\, known as radiative heat transfer. While for macroscopic objects thi
 s transfer is well understood in terms of Planck's law of black body radia
 tion\, it is fundamentally different for micro or nano-systems\, and I wil
 l discuss recent progress in theoretical understanding.\n	 \n\n//indico.i
 ctp.it/event/7807/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7807/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Condensed Matter Seminar: "The Importance of Being Ergodic
 : Cooling Down by Quantum Thermalization"
DTSTART;VALUE=DATE-TIME:20160223T130000Z
DTEND;VALUE=DATE-TIME:20160223T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7798@ictp.it
DESCRIPTION:\n	Abstract: The study of many-body quantum eigenstates has re
 cently revealed a novel dynamical transition\, dubbed many-body localizati
 on\, intimately related to the mechanism of quantum thermalization and res
 ulting from the competition between disorder and interaction. When the dis
 order becomes sufficiently strong\, ergodicity is not ensured and standard
  thermodynamics does not apply. Here\, we show manifestations of the weak/
 strong disorder regime in an open and driven quantum system. We consider a
  minimal model for Dynamic Nuclear Polarization (DNP)\, the most effective
  technique in NMR to increase nuclear polarization by doping a compound wi
 th unpaired electrons. We show that at moderate disorder\, nuclear spins e
 quilibrate to the eff ective spin-temperature established among the electr
 on spins of radicals\, as expected from the quantum theory of thermalizati
 on. Interestingly\, the highest polarization is reached at a point where t
 he establishment of a spin temperature is just about to break down due to 
 the incipient many-body localization transition in the electron spin syste
 m.\n\n//indico.ictp.it/event/7798/
LOCATION: Leonardo Building - Euler Lecture Hall
URL://indico.ictp.it/event/7798/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Condensed Matter Seminar: "Topological Phases in Ultracold
  Fermions: Artificial Fluxes Meet Spin-Orbit Couplings"
DTSTART;VALUE=DATE-TIME:20160224T130000Z
DTEND;VALUE=DATE-TIME:20160224T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7799@ictp.it
DESCRIPTION:\nThe recent successes in coupling ultracold gases to syntheti
 c gauge potentials show the exceptional possibilities of such setups in st
 udying and probing many-body quantum physics. In this talk\, I will review
  some aspects of the theory of topological phases of matter and I will des
 cribe how the combined action of synthetic magnetic fields and spin-orbit 
 couplings allow us to engineer in such systems both symmetry-protected top
 ological phases and non-trivial topological order. I will focus in particu
 lar on a ladder model of fermions which mimics a one-dimensional topologic
 al superconductor and presents fractionalized edge modes. The physical obs
 ervables suitable for the detection of topological phases in this system w
 ill be examined also in the presence of trapping potentials and Hubbard in
 teractions. Finally\, I will discuss further examples of higher-dimensiona
 l topological systems characterized by synthetic non-Abelian gauge potenti
 als.\n\n//indico.ictp.it/event/7799/
LOCATION: Leonardo Building - Euler Lecture Hall
URL://indico.ictp.it/event/7799/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Condensed Matter Seminar: "First-Principles Theory of Elec
 tron-Plasmon Coupling in Semiconductors"
DTSTART;VALUE=DATE-TIME:20160225T130000Z
DTEND;VALUE=DATE-TIME:20160225T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7800@ictp.it
DESCRIPTION://indico.ictp.it/event/7800/
LOCATION: Leonardo Building - Euler Lecture Hall
URL://indico.ictp.it/event/7800/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Condensed Matter Seminar: "New Theoretical Tools for Quant
 um Glasses\, With and Without Quenched Disorder"
DTSTART;VALUE=DATE-TIME:20160226T130000Z
DTEND;VALUE=DATE-TIME:20160226T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7801@ictp.it
DESCRIPTION://indico.ictp.it/event/7801/
LOCATION: Leonardo Building - Euler Lecture Hall
URL://indico.ictp.it/event/7801/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Condensed Matter Seminar: "Strongly Correlated Low-Dimensi
 onal Gases: From Supersymmetric Quantum Criticality to Majorana Quasi-Part
 icles"
DTSTART;VALUE=DATE-TIME:20160301T130000Z
DTEND;VALUE=DATE-TIME:20160301T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7802@ictp.it
DESCRIPTION:\nAbstract:\nUltracold quantum gases have emerged in recent ye
 ars as flexible platforms to experimentally access strongly correlated reg
 imes. In the first part of this talk\, I will discuss how novel techniques
  based on engineering long-range interactions using Rydberg gases pave the
  way for the investigation of frustrated magnetism in reduced dimensionali
 ty. In particular\, using a combination of analytical and numerical method
 s\, I will show how a certain class of soft-shoulder Hubbard models can su
 pport liquid states of matter which circumvent the restrictions imposed by
  Luttinger theorem\, and that are separated from more conventional liquids
  by supersymmetric conformal critical points. In the second part of the ta
 lk\, the focus will be on Majorana quasi-particles in fermionic quantum ga
 ses. These paradigmatic excitations have attracted a lot of interest recen
 tly due to their potential for quantum computing applications. However\, t
 heir observation is challenging\, as one has first to identify proper Hami
 ltonian setting supporting those\, and then find a proper probing. After r
 eviewing briefly which classes of cold atom Hamiltonians can support such 
 states\, I will present some recent results on how to employ a fractionali
 zed Josephson effect to hallmark the presence of Majorana quasi-particles 
 and distinguish them from more conventional excitations. \n\n\n//indico.ic
 tp.it/event/7802/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7802/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Driving-Induced Sta
 bility with Long-Range Effects"
DTSTART;VALUE=DATE-TIME:20160303T130000Z
DTEND;VALUE=DATE-TIME:20160303T143000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7819@ictp.it
DESCRIPTION:\n	We give a sufficient condition under which an applied noneq
 uilibrium driving in a medium always has a stabilizing effect on an attach
 ed quasi-static probe.  We show that the resulting Lamb shift in the symm
 etric part of the stiffness matrix with respect to equilibrium is positive
  and depends strongly on the nonequilibrium density far away from the prob
 e.  For illustration we take the example of diffusive medium particles wi
 th a self-potential in the shape of a Mexican hat\, repulsive at the origi
 n and attractive near the border of a disk where the potential energy gets
  very large. They   undergo a rotational force around the origin. For no
  or small rotation in the medium\, the origin is an unstable fixed point f
 or the probe and the precise shape of the self-potential at large distance
 s from the origin is irrelevant for the statistical force there.  Above a
  certain threshold of the rotation amplitude the origin becomes stable for
  the probe and more details of the medium start to matter.\n	(Joint work w
 ith Urna Basu\, Pierre de Buyl and Karel Netocny)\n\n//indico.ictp.it/even
 t/7819/
LOCATION:SISSA\, room 128\, first floor
URL://indico.ictp.it/event/7819/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Entanglement over t
 he Rainbow"
DTSTART;VALUE=DATE-TIME:20160308T100000Z
DTEND;VALUE=DATE-TIME:20160308T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7825@ictp.it
DESCRIPTION:\n	Abstract: In one dimension the area law for the entanglemen
 t entropy is violated maximally by the ground state of a strong inhomogene
 ous spin chain\, the so called concentric singlet phase (CSP)\, that looks
  like a rainbow connecting the two halves of the chain. We show that\, in 
 the weak inhomogeneity limit\, the rainbow state is a thermofield double o
 f a conformal field theory with a temperature proportional to the inhomoge
 neity parameter. This result suggests some relation of the CSP with black 
 holes. Finally\, we propose an extension of the model to higher dimensions
 .\n\n//indico.ictp.it/event/7825/
LOCATION:SISSA\, room 128\, first floor
URL://indico.ictp.it/event/7825/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Reactivity and Dynamics of Molecular Systems under High-Pressure Condition
 s"
DTSTART;VALUE=DATE-TIME:20160310T103000Z
DTEND;VALUE=DATE-TIME:20160310T120000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7822@ictp.it
DESCRIPTION:\n	 \n	Pressure is extremely efficient in tuning the interact
 ions in soft material such as the molecular ones. As a result\, important 
 changes of the structural\, dynamical and chemical properties can be induc
 ed even in relatively low pressure regimes. After a general introduction d
 irected to outline the importance of high pressure in nature and the instr
 uments necessary to create high pressure conditions in laboratory\, the at
 tention will be focused on two different\, although connected\, problems: 
 the chemical transformations of simple model systems under pressure and re
 cent challenging experiments directed to understand the dynamics of ultraf
 ast processes driven by pressure. As the reactivity is concerned\, the com
 plex interplay of structural properties\, lattice dynamical processes and 
 electronic arrangement will be discussed through several examples pointing
  to the importance of disentangling the effects of pressure\, temperature 
 and laser (or x-ray) radiation on the reaction activation to understand th
 e reactivity at the molecular level. The second part of part will be devot
 ed to the application of ultrafast spectroscopic techniques to samples com
 pressed in high-pressure devices. These experiments are extremely challeng
 ing having so far precluded the studies of ultrafast dynamics (reaction in
 termediates\, phase changes\, structural rearrangements) driven by pressur
 e. Recent results on the dynamics of liquid water\, water solutions and ic
 es demonstrate the feasibility and potentiality of this approach in monito
 ring non equilibrium states under high pressure conditions.\n\n//indico.ic
 tp.it/event/7822/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7822/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Chemical Physics Seminar: "Designing Materials by 'ab initio' Meth
 ods and Optimization Algorithms: The Search for New Transparent Conductors
  as a Case Study" 
DTSTART;VALUE=DATE-TIME:20160314T100000Z
DTEND;VALUE=DATE-TIME:20160314T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7826@ictp.it
DESCRIPTION:\n	Computational materials design is an emerging research para
 digm in which state-of-the-art electronic structure methods are applied to
  predict materials with target properties within families of candidate com
 pounds. In this seminar\, as an example of materials design driven by ab i
 nitio methods\, I will describe the application of density functional theo
 ry (DFT)\, and its corrections and extensions\, to predict new p-type tran
 sparent conducting materials (TCMs). While TCMs are crucial in optoelectro
 nics\, transparency and p-type conductivity rarely coexist in the same mat
 erial. To identify new candidate p-type TCMs\, we screened the family of k
 nown Ag and Cu oxides and identified Ag3VO4 and KAg11(VO4)4 as p-type cond
 uctors transparent to the red light. In these oxides\, the Ag vacancies ac
 t as intrinsic hole-generating defects\, and the hole effective mass is li
 ghter than in CuAlO2\, the prototypical p-type transparent conducting oxid
 e. However\, ab initio methods require the crystal structure as input info
 rmation to predict materials properties. Therefore\, the ability to predic
 t the crystal structure of hypothetical compounds without constraints or a
 ssumptions on the lattice symmetry is essential in order to discover new f
 unctional materials beyond the repertoires of known solids. Here\, I will 
 describe a crystal structure prediction method based on an evolutionary al
 gorithm to search for the global total-energy minimum of a solid calculate
 d by DFT as a function of the lattice vectors and atom positions. I will i
 llustrate the application of this global space-group optimization (GSGO) a
 lgorithm to selected binary and ternary solids. Finally\, I will discuss a
 n extension of the GSGO algorithm in which the stoichiometry is also optim
 ized so as to predict at the same time the composition and crystal structu
 re of the thermodynamically stable phases of a solid system.\n\n//indico.i
 ctp.it/event/7826/
LOCATION: Leonardo Building - Euler Lecture Hall
URL://indico.ictp.it/event/7826/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Universal Quantum P
 hysics in Driven Open Many-Body Systems"
DTSTART;VALUE=DATE-TIME:20160315T103000Z
DTEND;VALUE=DATE-TIME:20160315T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7827@ictp.it
DESCRIPTION:Abstract:\n\n	Quantum optics and many-body physics increasingl
 y merge together in ultracold atomic gases and certain classes of solid st
 ate systems. This gives rise to new non-equilibrium scenarios even in stat
 ionary state\, where coherent and dissipative dynamics appear on an equal 
 footing. Oftentimes however\, in the transition from microscopic scales to
  macroscopic distances\, much of the underlying quantum dynamics is washed
  out\, and the long distance many-body physics is (semi-)classical.\n	Here
  we present two instances which do not follow this generic pattern. The fi
 rst addresses the critical dynamics in a driven open system with a dark st
 ate realizable in microcavity arrays. We find it governed by a new non-equ
 ilibrium universality class\, characterized by the absence of decoherence 
 and thermalization. The second focuses on an ensemble of driven Rydberg at
 oms\, in which the interplay of constrained coherent quantum dynamics and 
 dissipation leads to a new variant of a non-equilibrium absorbing state tr
 ansition beyond the classical paradigm of directed percolation.\n\n//indic
 o.ictp.it/event/7827/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7827/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Disclosing Fluctuations of Lattice Atomic Positions by Non-Equilibrium Opt
 ical Experiments"
DTSTART;VALUE=DATE-TIME:20160317T103000Z
DTEND;VALUE=DATE-TIME:20160317T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7830@ictp.it
DESCRIPTION:\nAbstract:\n\n	Fluctuations of the atomic positions are at th
 e core of a large class of unusual material properties ranging from quantu
 m para-electricity and charge density wave to\, possibly\, high temperatur
 e superconductivity. Their measurement in solids is subject of an intense 
 scientific debate focused on the research of a methodology capable of esta
 blishing a direct link between the variance of the ionic displacements and
  experimentally measurable observables. In this presentation I will introd
 uce our new approach to address fluctuation by means of non-equilibrium op
 tical experiments performed in shot-noise limited regime. The variance of 
 the time dependent atomic positions and momenta is directly mapped into th
 e quantum fluctuations of the photon number of the scattered probing light
 . A fully quantum description of the non-linear interactions between photo
 nic and phononic fields pave the way for a direct measurement of fluctuati
 on in complex systems. \n	 References \n	Nature Comm. 5\, 5112 (2014)\n	
 New J. Phys. 16 043004 (2014)\n	Nature Comm. 6\, 10249 (2015)\n\n//indico.
 ictp.it/event/7830/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7830/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physis Seminar: "Darwinian versus The
 rmal Optimization"
DTSTART;VALUE=DATE-TIME:20160322T100000Z
DTEND;VALUE=DATE-TIME:20160322T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7834@ictp.it
DESCRIPTION:\n	Abstract: Darwinian optimization -- walkers that randomly d
 iffuse and reproduce proportionally to the quantity that has to be maximiz
 ed -- may be mapped into ordinary thermal optimization (e.g. Monte Carlo) 
 when applied to complex landscapes. We may thus see the limitations of the
  former clearly. More interestingly\, we may apply what we know from annea
 ling schemes to accelerating the dynamics of an evolving population.\n\n//
 indico.ictp.it/event/7834/
LOCATION:SISSA\, room 128\, first floor
URL://indico.ictp.it/event/7834/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Heterogeneous Catalytic Reduction of CO and CO2: From Ultra-high Vacuum to
  Ambient Conditions\, From Surface Science to Biomimetic Systems"
DTSTART;VALUE=DATE-TIME:20160331T093000Z
DTEND;VALUE=DATE-TIME:20160331T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7836@ictp.it
DESCRIPTION:\n	The catalytic reduction of carbon mono- and di-oxide is a p
 rocess that is effectively exploited in nature to synthesize energy vector
 s. Applicative devices based on heterogeneous (electro)-catalytic conversi
 on may be inspired by biomimetic approaches. However\, atomic level insigh
 t into the reaction mechanisms in order to yield engineering opportunities
  requires combined experimental and theoretical investigations at differen
 t levels of complexity\, thus crossing over material and pressure gaps bac
 k and forth. Starting from surface science investigations of the interacti
 on of carbon dioxide with single crystal surfaces under ultra-high vacuum 
 conditions\, selected case studies will be presented\, ending with single-
 atom and solid-liquid catalytic phases. In particular\, I will illustrate 
 results that were obtained by means of X-ray photoelectron spectroscopy an
 d IR-Vis SFG vibrational spectroscopy and corroborated by STM imaging and 
 ab initio simulations.\n\n//indico.ictp.it/event/7836/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7836/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Condensed Matter & Statistical Physics Seminar: "Dephasing
  Due to Nuclear Spins in Large-Amplitude Electric Dipole Spin Resonance"
DTSTART;VALUE=DATE-TIME:20160405T093000Z
DTEND;VALUE=DATE-TIME:20160405T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7850@ictp.it
DESCRIPTION:\n	Abstract: We have analyzed effects of the hyperfine interac
 tion on electric dipole spin resonance (EDSR) when the amplitude of the qu
 antum-dot motion becomes comparable or larger than the quantum dot's size.
  Away from the well-known small-drive regime\, the important role played b
 y transverse nuclear fluctuations leads to a gaussian decay of spin cohere
 nce with characteristic dependence on drive strength and detuning. A chara
 cterization of spin-flip gate fidelity\, in the presence of such additiona
 l drive-dependent dephasing\, shows that vanishingly small errors can stil
 l be achieved at sufficiently large amplitudes. Based on our theory\, we a
 nalyze recent EDSR experiments relying on spin-orbit interactions or the s
 lanting field of a micromagnet. We find that such experiments are already 
 in a regime with significant effects of transverse nuclear fluctuations an
 d the form of decay of the Rabi oscillations can be reproduced well by our
  theory. We will also briefly discuss other aspects of our research on sin
 gle and double quantum dots\, regarding the controlled generation of Dicke
  states in the nuclear spin bath and fast electron spin manipulation.\n\n/
 /indico.ictp.it/event/7850/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7850/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Classical Impuritie
 s and Boundary Majorana Zero Modes in Quantum Chains"
DTSTART;VALUE=DATE-TIME:20160406T143000Z
DTEND;VALUE=DATE-TIME:20160406T153000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7824@ictp.it
DESCRIPTION:\n	We study the response of classical impurities in quantum Is
 ing chains.  The Z2 degeneracy they entail renders the existence of two 
  decoupled Majorana modes at zero energy an exact property of a finite  s
 ystem at arbitrary values of its bulk parameters. We trace the  evolution
  of these modes across the transition from the disordered phase  to the o
 rdered one and analyze the concomitant qualitative changes of local  magn
 etic properties of an isolated impurity. In the disordered phase\,  the t
 wo ground states differ only close to the impurity. In this phase the  lo
 cal transverse spin susceptibility follows a Curie law.  The critical  r
 esponse of a boundary impurity is logarithmically divergent and maps to  
 the two-channel Kondo problem\, while it saturates for critical bulk  imp
 urities\, as well as in the ordered phase. The results for the Ising  cha
 in translate to the related problem of a resonant level coupled to a  1d 
 p-wave superconductor or a Peierls chain\, whereby the magnetic order is 
  mapped to topological order.  We find that the topological phase always
   exhibits a continuous impurity response to local fields as a result of 
 the  level repulsion of local levels from the boundary  Majorana zero mo
 de. In  contrast\, the disordered phase generically features a discontinu
 ous  magnetization or charging response. This difference constitutes a  
 general thermodynamic fingerprint of topological order in phases with a  
 bulk gap.\n\n//indico.ictp.it/event/7824/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7824/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Condensed Matter & Statistical Physics Seminar: "CSRC - Th
 e Beijing Computational Science Research Center and its activities"
DTSTART;VALUE=DATE-TIME:20160406T090000Z
DTEND;VALUE=DATE-TIME:20160406T093000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7835@ictp.it
DESCRIPTION://indico.ictp.it/event/7835/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7835/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Condensed Matter & Statistical Physics Seminar: "High Orde
 r Correlations of Quantum Gases in One Dimension""
DTSTART;VALUE=DATE-TIME:20160406T093000Z
DTEND;VALUE=DATE-TIME:20160406T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7851@ictp.it
DESCRIPTION:\nThe correlation function is an important object in the physi
 cs of ultra-cold quantum gases. However\, the study of high order correlat
 ion functions of interacting many-body systems is a notoriously difficult 
 problem. In this talk\, we first derive the explicit form of the M-body lo
 cal correlation functions gM of the one-dimensional (1D) strongly interact
 ing bosons in terms of dimensionless interaction strength  and the Haldan
 e exclusion statistical parameter  ∝ = 1 − 2/ϒ at zero\, low\, and i
 ntermediate temperatures. We rigorously prove that such a statistical para
 meter ∝ solely contributes the sub-leading order to the M-body local cor
 relation function of the gas with a finitely strong interaction regime. We
  also express the leading order of the short distance nonlocal correlation
  functions of the strongly repulsive Bose gas in terms of the wave functio
 n of M bosons at zero collision energy and zero total momentum. Finally\, 
 we further discuss the pair correlation and exact bounds between magnetism
  and Tan’s contact of 1D interacting fermions.\n\n\n//indico.ictp.it/eve
 nt/7851/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7851/
END:VEVENT
BEGIN:VEVENT
SUMMARY: 	 Joint ICTP/SISSA Statistical Physics Seminar: "Inhomogeneous Qu
 antum Systems in 1D: How does one Describe them with Conformal Field Theor
 y?"
DTSTART;VALUE=DATE-TIME:20160412T090000Z
DTEND;VALUE=DATE-TIME:20160412T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7855@ictp.it
DESCRIPTION:\nTwo-dimensional Conformal Field Theories (CFT) have been ver
 y successful as effective theories for classical statistical models at a c
 ritical point (like the critical 2d Ising model)\, or for quantum critical
  points in one spatial dimension. The results obtained from the CFT approa
 ch include\, for instance\, exact scaling exponents\, solutions of the Kon
 do and other quantum impurity problems\, and the many results on entanglem
 ent measures and quantum quenches obtained in the past decade. Yet\, in sp
 ite of the many successes of CFT\, there is a large class of one-dimension
 al systems that seems out of reach: inhomogeneous systems. For instance\, 
 a quantum gas in a trapping potential is inhomogeneous\, because the densi
 ty usually varies with position. The same is true about various out-of-equ
 ilibrium situations\, for example if particles are released from a trap. I
  will sketch how the standard CFT framework can be adapted to accomodate s
 uch situations\, by relying on a few elementary\, yet illustrative\, examp
 les based on free fermions.\n\n//indico.ictp.it/event/7855/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/7855/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Bistability and Kondo Effect in Molecular Quantum Dots: Numerics vs Analyt
 ical Results"
DTSTART;VALUE=DATE-TIME:20160414T093000Z
DTEND;VALUE=DATE-TIME:20160414T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7853@ictp.it
DESCRIPTION:\nElectrically contacted molecules are considered to be the ul
 timate current switches. Their typical dimensions of about 1 nm would allo
 w to design the smallest possible transistor units. However\, contrary to 
 solid state circuitry their conductance properties can be decisively influ
 enced by the harmonic degrees of freedom (local phonons). Surprisingly\, t
 here are parameter regimes\, in which the presence of such seemingly distu
 rbing effects might in fact become an advantage making such a device intri
 nsically bistable. We discuss these possibilities using analytical as well
  as numerical techniques and make predictions for the transport properties
  of contacted molecules in the relevant regimes and make contact to such f
 undamental multi-particle phenomena as Kondo effect.  \n\n \nReferences:
   \n\n- J. Klatt\, L. Mühlbacher\, and A. Komnik\, Phys. Rev. B 91\, 155
 306 (2015)  \n\n- K.F. Albrecht\, H. Wang\, L. Mühlbacher\, M. Thoss\, a
 nd A. Komnik\, Phys. Rev. B 86\, 081412(R) (2012)  \n\n- S. Maier\, T. L.
  Schmidt\, and A. Komnik\, Phys. Rev. B 83\, 085401 (2011) \n\n//indico.ic
 tp.it/event/7853/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7853/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Entanglement Evolut
 ion after Inhomogeneous Quantum Quenches\, and the Arctic Circle""
DTSTART;VALUE=DATE-TIME:20160415T123000Z
DTEND;VALUE=DATE-TIME:20160415T133000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7858@ictp.it
DESCRIPTION:\n	I consider a simple non-equilibrium problem\, where a criti
 cal one-dimensional system is prepared in a state with two different  den
 sities on the left and on the right\, and let evolve with a Hamiltonian th
 at conserves the number of particles. A typical example  would be a fermi
 onic system prepared with different left/right chemical  potentials. The 
 aim is to make analytical predictions regarding the behavior of correlatio
 ns as well as the entanglement spreading after such a quench.\n	I will dis
 cuss attempts at understanding such problems using field theory. A possibl
 e strategy is to study the behavior of the system in imaginary time\, the 
 real time dynamics being recovered by performing the Wick rotation. I will
  show  that all degrees of freedom outside a certain region may freeze in
  imaginary time\, contrary to naive expectations. This is analogous to the
  celebrated "arctic circle" phenomenon found in the study of two-dimension
 al classical dimer or vertex models.\n	I will also show that the fluctuati
 ng region is described by a massless field theory with a position-dependen
 t metric\, a field theory in curved space.\n\n//indico.ictp.it/event/7858/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/7858/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Physicist in Kitchen"
DTSTART;VALUE=DATE-TIME:20160420T133000Z
DTEND;VALUE=DATE-TIME:20160420T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7859@ictp.it
DESCRIPTION:\n	How heat propagates in media\, what is the difference betwe
 en pizza baking in the traditional wood oven and in the electric one\, why
  tastes of the boiled meet and the grilled one are so different\, how scie
 ntifically calculate cooking time of the soft-boiled duck egg and spaghett
 i\, why cin-cin with crystal glasses filled by sparkling wine is not accom
 panied by nice canorous sound\, why vodka usually contains around of 40 % 
 of alcohol\, why professional barman varies the degree of coffee beans gro
 unding depending on weather\, and many other questions of surrounding gast
 ronomic universe are discussed in this lecture.\n\n//indico.ictp.it/event/
 7859/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7859/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Hydrodynamic Transp
 ort\, Laminar Flow and the AdS/CFT Viscosity Bound in a Graphene Field Eff
 ect Transistor"
DTSTART;VALUE=DATE-TIME:20160422T120000Z
DTEND;VALUE=DATE-TIME:20160422T133000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7860@ictp.it
DESCRIPTION:\n	Graphene sheets encapsulated between crystals of boron nitr
 ide host a unique electron system that due to weak electron-phonon scatter
 ing allows micrometer-scale ballistic transport even at room temperature [
 1\,2\,3\,4]. Above liquid nitrogen temperatures\, these electron liquids a
 re expected to display local equilibrium\, enabled by strong electron-elec
 tron interactions [5]. Under these conditions\, electrons in doped samples
  are expected to behave as a viscous liquid and may exhibit hydrodynamic p
 henomena akin to those observed in classical and quantum liquids. In this 
 talk I will report on results of combined theoretical and experimental wor
 k [6\,7] showing unambiguous evidence for this long-sought transport regim
 e. In particular\, I will discuss how high-quality graphene sheets in the 
 Fermi liquid regime (exhibit an anomalous (negative) voltage drop near cur
 rent injection points\, which is attributed to the formation of whirlpools
  in the electron flow. Measurements of these quasi-local electrical signal
 s enable to extract the value of the kinematic viscosity of the two-dimens
 ional massless Dirac fermion liquid in graphene\, which is found to be an 
 order of magnitude larger than that of honey\, in quantitative agreement w
 ith many-body theory [8]. Finally\, I will discuss how our results near th
 e charge neutrality point ( are compatible with the AdS/CFT viscosity boun
 d [9\,10].\n	Our work represents the first step towards the observation of
  nearly perfect fluidity and quantum turbulence in solid-state devices.\n	
 References\n	[1]    A.S. Mayorov et al.\, Nano Lett. 11\, 2396 (2011).\
 n	[2]    L. Wang et al.\, Science 342\, 614 (2013).\n	[3]    T. Tayc
 hatanapat et al.\, Nature Phys. 9\, 225 (2013).\n	[4]    A. Woessner et
  al.\, Nature Mater. 14\, 421 (2015).\n	[5]    M. Polini and G. Vignale
 \, The quasiparticle lifetime in a doped graphene sheet.  In No-nonsense 
 physicist: an overview of Gabriele Giuliani's work and life (eds. M. Polin
 i\, G. Vignale\, V. Pellegrini\, and J.K. Jain) (Edizioni della Normale\, 
 Pisa\, 2016).\n	[6]    D. Bandurin\, I. Torre\, R.K. Kumar\, M. Ben Sha
 lom\, A. Tomadin\, A. Principi\, G.H. Auton\, E. Khestanova\, K.S. NovoseI
 ov\, I.V. Grigorieva\, L.A. Ponomarenko\, A.K. Geim\, and M. Polini\, Scie
 nce 351\, 1055 (2016). [7]    I. Torre\, A. Tomadin\, A.K. Geim\, and M
 . Polini\, Phys. Rev. B 92\, 165433 (2015). [8]    A. Principi\, G. Vig
 nale\, M. Carrega\, and M. Polini\, Phys. Rev. B 93\, 125410 (2016). [9] 
    P.K. Kovtun\, D.T. Son\, and A.O. Starinets\, Phys. Rev. Lett. 94\, 1
 11601 (2005). [10]    M. Müller\, J. Schmalian\, and L. Fritz\, Phys. 
 Rev. Lett. 103\, 025301 (2009).\n\n//indico.ictp.it/event/7860/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/7860/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Non-Equilibrium Ene
 rgy Transport at Quantum Criticality"
DTSTART;VALUE=DATE-TIME:20160426T090000Z
DTEND;VALUE=DATE-TIME:20160426T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7865@ictp.it
DESCRIPTION://indico.ictp.it/event/7865/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/7865/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Coherent Energy Transfer in Multi-chromophoric Biomimetic Light-harvesting
  Systems"
DTSTART;VALUE=DATE-TIME:20160428T093000Z
DTEND;VALUE=DATE-TIME:20160428T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7854@ictp.it
DESCRIPTION:\n	Abstract: One of the most surprising and significant advanc
 es in the study of the photosynthetic light-harvesting process is the disc
 overy that the electronic energy transfer might involve long-lived electro
 nic coherences\, also at physiologically relevant conditions. Central to t
 hese discoveries has been the development of new ultrafast spectroscopic t
 echniques\, in particular two-dimensional electronic spectroscopy (2DES)\,
  which is now the primary tool to obtain clear and definitive experimental
  proof of such effects [1]. A crucial point now is to understand the origi
 n and the relevance of such long-lived quantum coherences in transport pro
 cesses that seem to be strongly related to the complex interplay between e
 lectronic and vibrational degrees of freedom [2]. With the aim of clarifyi
 ng how different vibrational modes influence the mechanisms and the dynami
 cs of energy migration\, we focused our attention on simplified bio-mimeti
 c model systems. We suitably designed\, prepared and spectroscopically cha
 racterized different multi-chromophoric systems characterized by different
  interpigment distance and electronic coupling. The results obtained apply
 ing 2DES to these three samples and the comparison with the ones obtained 
 on the corresponding monomeric forms allowed isolating and identifying con
 tributions to the nonlinear signal associated with inter-exciton dynamics 
 (electronic coherences) from vibrational dynamics. The results allow sugge
 sting possible future guidelines for the design of artificial light-harves
 ting systems where energy migration is effectively driven by quantum mecha
 nics. [1] E. Collini\, Chem Soc Rev 42\, 4932-4947 (2013). [2] A.W. Chin\,
  et al.\, Nature Phys 9\, 113-118 (2013).\n\n//indico.ictp.it/event/7854/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7854/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Large Deviation The
 ory Applied to Climate Physics\, A New Frontier of Statistical Physics"
DTSTART;VALUE=DATE-TIME:20160503T090000Z
DTEND;VALUE=DATE-TIME:20160503T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7873@ictp.it
DESCRIPTION:\n	The main aim of this talk is to introduce and review some o
 f the recent developments in the theoretical and mathematical aspects of t
 he non-equilibrium statistical mechanics of turbulent geophysical flows an
 d climate dynamics. This field\, at the intersection between statistical\n
 	mechanics\, turbulence\, and climate applications is a wonderful new play
 ground for theoretical and mathematical physicists. Path integrals\, insta
 nton theory\, semiclassical approximations\, large deviation theory\, and 
 diffusion Monte-Carlo algorithms are at the core of our approach.\n	We wil
 l first discuss new theoretical results for the computation from path inte
 grals of the transition rates between attractors for irreversible dynamics
  (the non-equilibrium Eyring-Kramers law). We will then consider two class
 es of applications in climate dynamics for which\, rare dynamical events p
 lay a key role\, and large deviation theory proves useful. A first class o
 f problems are extreme events that have huge impacts\, for instance extrem
 e heat waves. We will apply large deviation algorithms to compute the prob
 ability of extreme heat waves. A second class of problems are rare traject
 ories that suddenly drive the complex dynamical system from one attractor 
 to a completely different one\, for instance abrupt climate changes. We wi
 ll treat the example of the disappearance of one of Jupiter's jets during 
 the period 1939-1940\, as a paradigmatic example of a drastic climate chan
 ge related to internal variability. We will demonstrate that quasi geostro
 phic turbulent models show this kind of ultra rare transitions\, where tur
 bulent jets suddenly appear or disappear on times scales tens of thousands
  times larger than the typical dynamical time scale. Those transitions wil
 l be studied using large deviation theory and non-equilibrium statistical 
 mechanics.\n\n//indico.ictp.it/event/7873/
LOCATION:SISSA\, room 128\, first floor
URL://indico.ictp.it/event/7873/
END:VEVENT
BEGIN:VEVENT
SUMMARY: ICTP Seminar Series in Condensed Matter and Statistical Physics: 
 "Probing Band Topology in Synthetic Quantum Matter" 
DTSTART;VALUE=DATE-TIME:20160505T123000Z
DTEND;VALUE=DATE-TIME:20160505T140000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7872@ictp.it
DESCRIPTION:\n	Topology and geometry are fundamental to our understanding 
 of modern physics\, underlying many foundational concepts from high energy
  theories\, quantum information\, and condensed matter physics. In condens
 ed matter systems\, a wide range of phenomena stem from the geometry of th
 e band eigenstates\, the most prominent examples being the Quantum Hall Ef
 fect and Topological Insulators\, which are governed by the Berry curvatur
 e of isolated bands. For general multi-band systems\, the geometry of Hilb
 ert space is encoded in the matrix-valued Wilson line\, giving rise to mor
 e intricate transport phenomena and holding the potential for holonomic qu
 antum computing. I will start with an introduction into these concepts and
  then present interferometric measurements of Bloch band geometry using ul
 tracold atoms in optical lattices. In analogy to an Aharonov-Bohm interfer
 ometer that measures magnetic flux\, we realized an atomic interferometer 
 measureing Berry curvature in momentum space. For our graphene-type hexago
 nal optical lattice\, this interferometer enabled us to directly observe t
 he singular pi-Berry flux localized at each Dirac point. We furthermore en
 gineered strong-force dynamics in Bloch bands that are described by Wilson
  lines and observed an evolution in the band populations that directly rev
 eals band geometry. Our techniques enable a full determination of the disp
 ersion relations\, band eigenstates\, Berry curvature distributions\, and 
 topological invariants\, including single- and multi-band Chern and Z2 num
 bers. Time permitting\, I'll also present a short update on our activities
  regarding Many-Body Localization (MBL).\n\n//indico.ictp.it/event/7872/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7872/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Multichannel Kondo 
 Physics and Surface Code from Interacting Majorana Bound States"
DTSTART;VALUE=DATE-TIME:20160510T090000Z
DTEND;VALUE=DATE-TIME:20160510T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7877@ictp.it
DESCRIPTION:\n	Abstract: In this talk\, I will discuss the physics on inte
 racting Majorana fermions (where interactions are due to the charging ener
 gy of a mesoscopic superconductor) in the context of Kondo physics and for
  a 2D Majorana surface code.\n\n//indico.ictp.it/event/7877/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/7877/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Driven Markovian Qu
 antum Criticality"
DTSTART;VALUE=DATE-TIME:20160517T090000Z
DTEND;VALUE=DATE-TIME:20160517T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7881@ictp.it
DESCRIPTION:\nIn this talk I discuss the emergence of novel universal crit
 ical behaviour in one-dimensional driven open quantum Bose gases in the pr
 esence of diffusive Markovian noise.  Salient features are the persistenc
 e of both non-equilibrium conditions as well as quantum coherence close to
  the critical point. This provides a non-equilibrium analogue of quantum c
 riticality\, sharply distinct from more generic driven systems where both 
 effective thermalisation as well as asymptotic decoherence ensue\, paralle
 ling classical dynamical criticality. The novel critical point is characte
 rised by the full set of independent critical exponents\, which are extrac
 ted from a functional renormalisation group suited for the Keldysh action.
 \n\n//indico.ictp.it/event/7881/
LOCATION:ICTP\, Stasi Seminar Room Leonardo Building - Luigi Stasi Seminar
  Room
URL://indico.ictp.it/event/7881/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Parametric Resonanc
 es: From Single Atoms to Many-body Systems"
DTSTART;VALUE=DATE-TIME:20160524T093000Z
DTEND;VALUE=DATE-TIME:20160524T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7866@ictp.it
DESCRIPTION:\n	I will open my talk by explaining the fundamental concept o
 f parametric resonance and giving examples of some practical application (
 Paul traps\, Kapitza pendulum). I will then clarify why the existence of t
 his phenomenon in many-body systems is still debated. Although it is belie
 ved that large systems cannot display true parametric resonances\, I will 
 overview some exceptions to this general rule. In the last part of the tal
 k\, I will describe some new results on the dynamics of periodically-drive
 n many-body quantum systems.\n	REFERENCES:\n	Citro etal\, Annals of Physic
 s\, 360\, 694 (2015)\n	Russomanno and Dalla Torre\, arxiv:1510.08866\n\n//
 indico.ictp.it/event/7866/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7866/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Light\, Sound and Topology" 
DTSTART;VALUE=DATE-TIME:20160526T093000Z
DTEND;VALUE=DATE-TIME:20160526T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7870@ictp.it
DESCRIPTION:\n	The interaction between radiation and mechanical motion on 
 the nanoscale is now being studied intensively. Known as cavity optomechan
 ics\, this field promises applications in quantum communication\, sensitiv
 e measurements\, and fundamental studies of quantum physics. After a gener
 al introduction\, I will turn to some recent ideas of ours that envisage c
 ontrollable transport of photons and phonons in so-called optomechanical a
 rrays. Once realized\, these systems could feature engineered chiral edge 
 channels for light and sound that are topologically protected against diso
 rder- scattering.\n	[1] "Cavity optomechanics”\, M. Aspelmeyer\, T. Kipp
 enberg\, and F. Marquardt\, Reviews of Modern Physics 86\, 1391 (2014)\n	[
 2] “Topological Phases of Sound and Light”\, V. Peano\, C. Brendel\, M
 . Schmidt\, and F. Marquardt\, Phys. Rev. X 5\, 031011 (2015)\n\n//indico.
 ictp.it/event/7870/
LOCATION:ICTP Leonardo Building - Lecture Room D
URL://indico.ictp.it/event/7870/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Spatio-temporal Pat
 terns in Ultra-slow Domain Wall Creep Dynamics"
DTSTART;VALUE=DATE-TIME:20160530T090000Z
DTEND;VALUE=DATE-TIME:20160530T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7892@ictp.it
DESCRIPTION:\n	In presence of impurities\, ferromagnetic and ferroelectric
  domain walls slide only above a finite external field. Close to this depi
 nning threshold\, the wall proceeds by large and abrupt jumps\, called ava
 lanches\, while\, at much smaller field\, it creeps by thermal activation.
 \n	In our work  we developed a novel numerical technique that captures th
 e ultra-slow creep regime over huge time scales\, allowing us to access th
 e regime of very low force and temperature.\n	Thanks to this technique we 
 point out the existence of activated events that involve collective reorga
 nizations similar to avalanches\, but\, at variance with them\, display co
 rrelated spatio-temporal patterns that recall the complex sequence of afte
 rshocks observed after a large earthquake.\n	Remarkably\, we show that eve
 nts assembly in independent clusters owning the same scale-free statistics
  as critical depinning avalanches.\n	This correlated dynamics should be ex
 perimentally accessible by magneto-optical imaging of ferromagnetic films.
 \n\n//indico.ictp.it/event/7892/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/7892/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Physics Seminar: " Exploring the Quantum Speed Li
 mit with Online Players"
DTSTART;VALUE=DATE-TIME:20160624T093000Z
DTEND;VALUE=DATE-TIME:20160624T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7901@ictp.it
DESCRIPTION:\n	* ACTIVITY CANCELLED *\n\n//indico.ictp.it/event/7901/
LOCATION:
URL://indico.ictp.it/event/7901/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Quantum Quenches an
 d Exact Correlations in the Heisenberg Spin Chains"
DTSTART;VALUE=DATE-TIME:20160628T090000Z
DTEND;VALUE=DATE-TIME:20160628T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7910@ictp.it
DESCRIPTION://indico.ictp.it/event/7910/
LOCATION:SISSA\, Room 128\, first floor
URL://indico.ictp.it/event/7910/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: "Photonic Nonlinear Quantum Resonators"
DTSTART;VALUE=DATE-TIME:20160629T090000Z
DTEND;VALUE=DATE-TIME:20160629T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7911@ictp.it
DESCRIPTION:Abstract:\nThere will be a short introduction to many-body phy
 sics with light containing a presentation of the driven-dissipative Bose-H
 ubbard model. One of the main numerical challenges for the description of 
 these photonic lattice systems will be highlighted: the exponentially larg
 e Hilbert space. \n\nIn the first part a recently developed numerical appr
 oach will be presented which circumvents this problem by truncating the hi
 gher order many-body correlations. This method is then applied to the anti
 bunching to bunching crossover in extended 2D lattice structures. These re
 sults are benchmarked with the corner-space renormalisation method. \n\nTh
 en\, in the second part\, the physics of optical bistability for a single 
 driven-dissipative nonlinear cavity in the quantum regime is revisited. Th
 e dynamical nature of the associated hysteresis is revealed with a rich do
 uble power law behaviour of the hysteresis area. \n\nFinally\, a scaling a
 nalysis based on the Liouvillian gap is presented which qualitatively expl
 ains the double power law.\n\n//indico.ictp.it/event/7911/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7911/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Stimulating New Qua
 ntum Systems with Multicomponent Ultracold Fermions"
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7917@ictp.it
DESCRIPTION://indico.ictp.it/event/7917/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/7917/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Universal Front Pro
 pagation in the XY Spin Chain with Domain Wall Initial Conditions"
DTSTART;VALUE=DATE-TIME:20160712T090000Z
DTEND;VALUE=DATE-TIME:20160712T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7924@ictp.it
DESCRIPTION://indico.ictp.it/event/7924/
LOCATION:SISSA\, Room 128\, first floor
URL://indico.ictp.it/event/7924/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: "Majorana Fermions in One Dimension"
DTSTART;VALUE=DATE-TIME:20160718T090000Z
DTEND;VALUE=DATE-TIME:20160718T093000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7918@ictp.it
DESCRIPTION:\n	In a classic paper by Alexei Kitaev (2001) the existence of
  Majorana\n	fermion type excitations appearing in the form of boundary sta
 tes were\n	predicted for superconducting 1-D spineless fermions. Since the
 n there has\n	been tremendous progress both on the theoretical and the exp
 erimental\n	fronts on this topic. In this talk I will first discuss an ind
 ependent\n	route to the Topological description of this system using the p
 hysics of\n	"exceptional point". Then I will also discuss a recent proposa
 l involving\n	unique interferometric signature for Majorana bound state wh
 ich cannot be\n	faked by any accidental zero energy Andreev bound state. T
 hough there has\n	been considerable progress on the experimental side but 
 still a smoking gun\n	experimental for detection of Majorana bound states 
 is yet to be in place\n	and hence the discussion of various possible exper
 imental set ups for\n	detecting these excitations is of importance.\n\n//i
 ndico.ictp.it/event/7918/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7918/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: "Analytical Recursive Method to Ascertai
 n Multisite Entanglement in Doped Quantum Spin Ladders"
DTSTART;VALUE=DATE-TIME:20160719T093000Z
DTEND;VALUE=DATE-TIME:20160719T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7913@ictp.it
DESCRIPTION:\n	We formulate an analytical recursive method to generate the
  wave function of doped short-range resonating valence bond (RVB) states a
 s a tool to efficiently estimate multisite entanglement as well as other p
 hysical quantities in high-temperature superconducting ladder states\, usu
 ally described by doping the Mott insulator. We prove that doped RVB ladde
 r states are always genuine multipartite entangled. Importantly\, our resu
 lts show that within specific doping concentration and model parameter reg
 imes\, the doped RVB state essentially characterizes the trends of genuine
  multiparty entanglement in the exact ground states of a Hubbard model wit
 h large onsite interactions. More over\, the maximum genuine multipartite 
 entanglement in these doped RVB states is observed at relatively large dop
 ing concentrations which correspond to the superconducting phase boundary 
 of the Hubbard model.\n\n//indico.ictp.it/event/7913/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7913/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Seminar: "Free\, Higher D
 erivative Scalar Field Drives Quantum Phase Transition"
DTSTART;VALUE=DATE-TIME:20160720T090000Z
DTEND;VALUE=DATE-TIME:20160720T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7922@ictp.it
DESCRIPTION:\n	We explicitly show that sixth order spatial derivative\, Lo
 rentz symmetry violating term in two dimensional space leads to quantum ph
 ase transition. We show that around the critical point\, the number of zer
 o modes increase dramatically that catalyze the change in the ground state
  property of the many-body wave function. We extend the analysis to three 
 dimensional cylindrical geometry and show that the entanglement heat-capac
 ity has similar profile to the heat capacity measurements of high temperat
 ure superconductors. We explicitly show that the long-range interaction in
  the two dimensional surface explain key features of high temperature supe
 rconductors.\n\n//indico.ictp.it/event/7922/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7922/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Seminar: 'Collective Cohe
 sive Motion of Chaotic Attractors'
DTSTART;VALUE=DATE-TIME:20160720T140000Z
DTEND;VALUE=DATE-TIME:20160720T153000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7923@ictp.it
DESCRIPTION:\n	Abstract:\n	We report a simple model of two drive-response 
 type coupled chaotic oscillators where the reponse system copies the nonli
 nearity of the driver system. It leads to a coherent motion of the coupled
  systems\, however\, it establishes a separating distance\, constant in ti
 me\, between the driver and response attactors that depends upon the initi
 al state. The coupled system responds to external obstacles\, modelled by 
 a short-duration pulses acting either on the driver or the response system
 \, by a coherent shifting of the distance and\, readjust their distance as
  and when necessary by talking to each other via a mutual exhange of feedb
 ack information. We provide numerical confirmation in a Jerk system and ex
 tend the results to a collection of oscillators to produce a cohesive moti
 on.\n\n//indico.ictp.it/event/7923/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7923/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics: "Giant Edge Spin Accumul
 ation in a Symmetric Quantum Well with Two Subbands"
DTSTART;VALUE=DATE-TIME:20160725T090000Z
DTEND;VALUE=DATE-TIME:20160725T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7932@ictp.it
DESCRIPTION:\n	We have studied the edge spin accumulation due to electric 
 current in a high mobility two-dimensional electron gas formed in a symmet
 ric well with two subbands. This study is strongly motivated by the recent
  experiment of Hernandez et al. [Phys. Rev. B 88\, 161305(R) (2013)] who d
 emonstrated the spin accumulation near the edges of a bilayer symmetric Ga
 As structure in contrast to no effect in a single-layer configuration. The
  intrinsic mechanism of the spin-orbit interaction we consider arises from
  the coupling between two subband states of opposite parities. We obtain a
  parametrically large magnitude of the edge spin density for a two-subband
  well as compared to the usual single-subband structure. We show that the 
 presence of a gap in the system\, i.e.\, the energy separation $B&$(B betw
 een the two subband bottoms\, changes drastically the picture of the edge 
 spin accumulation. Thus one can easily proceed from the regime of weak spi
 n accumulation to the regime of strong one by varying the Fermi energy (el
 ectron density) and/or $B&$(B. We estimate that by changing the gap $B&$(B
  from zero up to 1 $B!`(B 2 K only\, the magnitude of the effect changes b
 y three orders of magnitude. This opens up the possibility for the design 
 of new spintronic devices.\n\n//indico.ictp.it/event/7932/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7932/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics: "Fate of Quantum Critica
 l Scaling under Periodic Driving"
DTSTART;VALUE=DATE-TIME:20160727T120000Z
DTEND;VALUE=DATE-TIME:20160727T133000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7930@ictp.it
DESCRIPTION:\n	Quantum many body systems driven out-of-equilibrium by mean
 s of time-dependent Hamiltonians are currently of great interest both theo
 retically and experimentally. In this talk the quantum Ising model with a 
 periodic modulation of the transverse magnetic field is considered and its
  dynamical properties are investigated under different driving conditions.
  The Ising model is the simplest many body system exhibiting a second orde
 r quantum phase transition at the critical value of the transverse field h
 =h_c\, where both magnetic observables\, and other physical quantities tha
 t are not observables in the quantum-mechanical sense\, exhibit scaling re
 lations: the transverse magnetic susceptibility\, the concurrence\, the fi
 delity susceptibility all display finite-size scaling according to the exp
 onents belonging to the Ising universality class at criticality. We addres
 s the question of the validity of these scaling relations when the system 
 is periodically driven across the critical point. Furthermore\, the asympt
 otic steady state Entanglement Entropy is investigated\, showing that it a
 pproaches a volume law.\n\n//indico.ictp.it/event/7930/
LOCATION: Leonardo Building - Euler Lecture Hall
URL://indico.ictp.it/event/7930/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics: "Supercritical Phenomena
  in Graphene Induced by Charged Impurities"
DTSTART;VALUE=DATE-TIME:20160727T090000Z
DTEND;VALUE=DATE-TIME:20160727T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7933@ictp.it
DESCRIPTION:\n	Besides being a material with broad spectrum of potential n
 anotechnology application\, graphene has attracted much attention as table
 -top\, testing ground for relativistic quantum mechanics and QED in (2+1)-
 dimensions. The reason is caused by the fact that quasiparticle dynamics i
 n graphene is relativistic with the coupling constant 300-times smaller th
 an the fine structure constant. In particular\, such relativistic and QED 
 effects as vacuum polarizaion\, Schwinger pair production\, Klein tunnelin
 g\, Darmstadt effect etc.\, can be experimentally studied in graphene at a
 lmost table-top level. This can be achieved by creating supercritical stat
 es in graphene via doping of graphene by charged impurities. They become t
 hen planar atoms with relativistic electron dynamics. Such impurities can 
 be engineered by strain as well\, or can simply result from adsorbed ions 
 (as was demonstrated by recent experiments). In this talk\, discuss superc
 ritical phenomena induced by two charged (Coulomb) impurities by consideri
 ng both\, same and opposite (dipole) signs of charges by presenting detail
 ed introduction to relativistic quantum mechanics\, supercritical phenomen
 a and the results on planar relativistic two-center Coulomb problem. In pa
 rticular\, for graphene\, we consider the case of two close-by impurities 
 of equal absolute charge. For opposite sign of the charges\, this realizes
  a dipole potential at large distances\, while for equal charges one has a
  symmetric two-impurity potential. For the dipole type impurities\, we hav
 e established that the dipole potential accommodates towers of infinitely 
 many bound states exhibiting a universal Efimov scaling hierarchy. The dip
 ole moment determines the number of towers\, but there is always at least 
 one tower.\n\n//indico.ictp.it/event/7933/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7933/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: "Dynamical View of Quantum Thermodynamic
 s: Insight from Heat Engines"
DTSTART;VALUE=DATE-TIME:20160728T093000Z
DTEND;VALUE=DATE-TIME:20160728T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7925@ictp.it
DESCRIPTION:\n	Quantum thermodynamics addresses the emergence of thermodyn
 amical laws from quantum me- chanics. The viewpoint advocated is based on 
 the intimate connection of quantum thermodynamics with the theory of open 
 quantum systems. Quantum mechanics inserts dynamics into thermody- namics 
 giving a sound foundation to finite-time-thermodynamics. The emergence of 
 the 0-law I-law II-law and III-law of thermodynamics from quantum consider
 ations will be presented through exam- ples. I will show that the 3-level 
 laser is equivalent to Carnot engine. I will reverse the engine and obtain
  a quantum refrigerator. Different models of quantum refrigerators and the
 ir optimisation will be discussed. A heat-driven refrigerator (absorption 
 refrigerator) is compared to a power-driven refrigerator related to laser 
 cooling. This will lead to a dynamical version of the III-law of thermo- d
 ynamics limiting the rate of cooling when the absolute zero is approached.
  I will show that various engine types are thermodynamically equivalent in
  the quantum limit of small engine action. I will address the question why
  we find heat exchangers and flywheels in quantum engines. I will present 
 a molecular model of a heat rectifier and a heat pump in a non-Markovian a
 nd strong coupling regime [? ].\n	[1–5]\n	 \n	[1] K. H. Hoffmann\, P. S
 alamon\, Y. Rezek and R. Kosloff\, Euro. Phys. Lett. 96\, 60015 (2011). [2
 ] A. Levy\, R. Alicki\, and R. Kosloff\, Phys. Rev. E 85\, 061126 (2012)\,
  URL http://link.aps.org/doi/10.1103/PhysRevE.\n	85.061126. [3] Ronnie Kos
 loff\, Entropy 15\, 2100 (2013). [4] R. Kosloff and A. Levy\, Annu. Rev. P
 hys. Chem. 65\, 365 (2014). [5] R. Uzdin and R. Kosloff\, New J. Phys. 16\
 , 095003 (2014).\n\n//indico.ictp.it/event/7925/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7925/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Seminar: "Topological Pha
 se Transitions in Silicene"
DTSTART;VALUE=DATE-TIME:20160801T090000Z
DTEND;VALUE=DATE-TIME:20160801T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7934@ictp.it
DESCRIPTION:\n	Physics has benefited greatly from ideas that were independ
 ently developed in mathematics. Topology is a branch of mathematics that s
 tudies shapes. Properties that do not change under continuous deformation 
 including stretching and bending are topological in nature. Now some of th
 ese topological ideas have become important in several areas of physics. I
 n this talk\, I will begin with an introduction of topological phases of m
 atter in free Fermionic systems. I will then focus on my work on topologic
 al phase transitions in a new and important two-dimensional Dirac material
  silicene. A combination of intrinsic spin-orbit interaction and an extern
 al electric field leads to quantum phase transitions at the charge neutral
 ity point in silicene. This phase transition from a topological insulator 
 to a trivial insulator phase in silicene is accompanied by a quenching of 
 quantum spin Hall effect and onset of valley Hall effect. Possible experim
 ental tunability of topological state of silicene will also be discussed.\
 n\n//indico.ictp.it/event/7934/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7934/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Physics Seminar: "Statics and Dynamical Quantum C
 orrelations in Inhomogeneous Transverse Field XY Model""
DTSTART;VALUE=DATE-TIME:20160802T093000Z
DTEND;VALUE=DATE-TIME:20160802T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7902@ictp.it
DESCRIPTION:\n	Homogeneous quantum system is very rare in nature due to de
 coherence\, thermal fluctuations\, impurities\, etc. Hence\, inhomogeneous
  quantum many-body systems form a more practical ground to implement quant
 um information protocols. Equilibrium and non-equilibrium dynamics of quan
 tum correlations in homogeneous spin systems is well studied in literature
 . We have investigated the static and dynamical patterns of entanglement i
 n an anisotropic XY model with an alternating transverse magnetic field. A
 part from the antiferromagnetic and paramagnetic phases\, the model posses
 ses a dimer phase which is not present in the homogeneous transverse field
  XY model. At zero temperature\, we find that the first derivative of bipa
 rtite entanglement can detect all the three phases. Next\, we introduce mo
 re inhomogeneity in the transverse field in the same system and study the 
 behaviour of entanglement in a random-field quantum XY model under quenche
 d disorder. I will show that the quantum discord length is significantly e
 nhanced by the introduction of disorder while entanglement length show no 
 significant enhancement.\n\n//indico.ictp.it/event/7902/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7902/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: 'Strongly Correlated Systems with Nearly
  Flat Bands'
DTSTART;VALUE=DATE-TIME:20160818T093000Z
DTEND;VALUE=DATE-TIME:20160818T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7940@ictp.it
DESCRIPTION:Abstract:\nThere are plenty of lattices in one\, two\, and thr
 ee dimensions  which support a completely dispersionless (flat) one-parti
 cle energy band.  If the flat band happens to be the lowest-energy one\,
   it is possible to construct and completely characterize  a certain man
 ifold of many-particle ground states  even in the presence of strong inte
 ractions.  These states determine the low-temperature properties  of str
 ongly correlated systems  in a specific range of external parameters [1].
   \nIn this talk I discuss the effect of slight dispersion of a previous
 ly strictly flat band.  I focus on the high-field low-temperature propert
 ies  of some quantum Heisenberg antiferromagnets [2] and on the kinetic-e
 nergy-driven ground-state ferromagnetism  in the standard Hubbard model a
 t low electron densities [3].  I also discuss why these findings are usef
 ul  in searching for experimental manifestation of flat-band effects in s
 trongly correlated systems.  \n \n[1] O. Derzhko\, J. Richter\, and M. 
 Maksymenko\,  Int. J. Mod. Phys. B 29\, 1530007 (2015).  \n[2] O. Derzh
 ko\, J. Richter\, O. Krupnitska\, and T. Krokhmalskii\,  Phys. Rev. B 88\
 , 094426 (2013)\;  Low Temp. Phys. 40\, 513 (2014)\;  J. Richter\, O. Kr
 upnitska\, T. Krokhmalskii\, and O. Derzhko\,  J. Magn. Magn. Mater. 379\
 , 39 (2015).  \n[3] O. Derzhko and J. Richter\,  Phys. Rev. B 90\, 0451
 52 (2014)\;  P. Müller\, J. Richter\, and O. Derzhko\,  Phys. Rev. B 93
 \, 144418 (2016). \n\n//indico.ictp.it/event/7940/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7940/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Seminar: "Quantum informa
 tion Research in Tehran"
DTSTART;VALUE=DATE-TIME:20160829T080000Z
DTEND;VALUE=DATE-TIME:20160829T090000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7944@ictp.it
DESCRIPTION:\n	I will give an overview of research in quantum information 
 and related fields in our group in Sharif University of Technology.\n	The 
 research covers a wide scope of topics\, some of which have a slight overl
 ap with condensed matter physics.\n	I will then describe a recent work on 
 static quantum circuits using quantum spin chains.\n	Short lectures will f
 ollow by two Sharif graduates\, who will present two examples:\n	- Marzieh
  Asoudeh\, Azad University of Tehran\n	Title: Quantum Secret Sharing witho
 ut Entanglement\n	- Laleh Memarzadeh\, Sharif University of Technology\n	T
 itle: Transition between topological and ferromagnetic order in Kitaev-Isi
 ng mode\n\n//indico.ictp.it/event/7944/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7944/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Section: "New High Pressu
 re Layered Phases of CS2 and SiS2"
DTSTART;VALUE=DATE-TIME:20160909T093000Z
DTEND;VALUE=DATE-TIME:20160909T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8011@ictp.it
DESCRIPTION:\n	CS2 and SiS2 belong to the important family of IV–VI AB2 
 compounds made of light elements which includes archetypal systems such as
  CO2 and SiO2. In solid CS2 a series of structural transitions was observe
 d at high pressure upon compression of the Cmca molecular crystal\, eventu
 ally resulting in a disordered tetrahedral structure [1] which did not all
 ow an accurate structural determination. We applied an ab initio evolution
 ary search [2] and found a new layered tetrahedral P21/c structure\, of es
 pecially high stability\, and characterized by pairs of edge-sharing tetra
 hedra [3]. Unlike tetrahedrally coordinated CO2 phases\, this structure un
 dergoes a semiconductor-metal transition at the relatively low pressure of
  30-50 GPa [3]\, a transition which is in agreement with experiment [1]. T
 his layered structure appears to be a likely candidate for the phase found
  experimentally above 30 GPa in Ref.[1]. With that in mind we suggest that
  by applying high pressure at low temperature one could perhaps prepare th
 is phase with higher crystallinity thus allowing for better structural com
 parisons with our prediction\, and to this end we calculated the Raman and
  IR spectra of the new phase. Wondering moreover whether similar phases co
 uld appear in different compounds of the same family\, we extended our int
 erest to SiS2. Strikingly\, the very same P21/c layered structure which we
  predicted for CS2 turned out to be recently observed (and named HP1) in S
 iS2 [4]\, a finding which points to a new link in the high-pressure crysta
 l chemistry of this family of compounds. Actually\, the high-pressure phas
 e diagram of SiS2 is currently known only up to cca 6 GPa\, featuring seve
 ral tetrahedrally coordinated phases (NP\, HP1\, HP2\, HP3)\, but nothing 
 seems to be known about the structural and electronic evolution of SiS2 at
  higher pressures. By means of ab initio calculations combined with evolut
 ionary structure searching [5] we now predict three new low-enthalpy phase
 s of SiS2 with space groups P-3m1\, P63mc and R-3m [6]. In all three phase
 s\, the Si coordination has switched from 4 to 6 and\, interestingly\, all
  these new structures are layered\, consisting of sheets formed by edge-sh
 aring octahedra (SiS6 units). The most stable P-3m1 phase (with a single S
 iS2 layer per unit cell) is isostructural to CdI2\, where all sheets are d
 irectly above each other. It becomes stable above 6 GPa and at low pressur
 es is semiconducting with an indirect band gap. The gap closes with increa
 sing pressure leading to metallization around 30 GPa. New high pressure me
 asurements will be called for to address these predictions. Facile sliding
  of these high pressure layered structures should also be of interest.\n	[
 1] R. P. Dias\, C.-S. Yoo\, M. Kim\, J. S. Tse\, Phys. Rev. B 84\, 144104 
 (2011).\n	[2] A. Oganov \, C. Glass\, J. Chem. Phys. 124\, 244704 (2006).\
 n	[3] S. S. Naghavi\, Y. Crespo\, R. Martoňák\, E. Tosatti\, Phys. Rev. 
 B 91\, 224108 (2015).\n	[4] J. Evers\, P. Mayer\, et al.\, Inorg. Chem. 54
 \, 1240 (2015).\n	[5] D. Lonie\, E. Zurek\, Comput. Phys. Commun. 182\, 37
 2 (2011) [6] D. Plašienka\, R. Martoňák\, E. Tosatti\, in preparation.\
 n\n//indico.ictp.it/event/8011/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8011/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics: "Meissner to Vortex Phas
 e Transition in Spin-Orbit Coupled Ladders"
DTSTART;VALUE=DATE-TIME:20160913T093000Z
DTEND;VALUE=DATE-TIME:20160913T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-7931@ictp.it
DESCRIPTION:\n	We discuss the phase diagram of an interacting boson two-le
 g ladder in a flux investigated by means of bosonization and density matri
 x renormalization group (DMRG) techniques. We show experimentally accessib
 le observables such as the momentum distribution\, as well as rung current
 \, density wave\, and bond-order wave correlation functions\, allowing us 
 to identify the Mott Meissner and Mott vortex states. We follow the transi
 tion from commensurate Meissner to incommensurate vortex state at increasi
 ng interchain hopping until the critical value above which the Meissner st
 ate is stabilized at any flux. For large flux\, and below the critical hop
 ping\, we observe the formation of a second incommensuration in the Mott v
 ortex state that could be detectable in current experiments with atoms.\n\
 n//indico.ictp.it/event/7931/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/7931/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Seminar: "The Rise of Nan
 ogeoscience:Investigation of Nano scale Phenomena at Upstream Oil Industry
 "
DTSTART;VALUE=DATE-TIME:20160916T093000Z
DTEND;VALUE=DATE-TIME:20160916T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8018@ictp.it
DESCRIPTION:\n	Nanogeoscience is a rapidly rising star in the field of geo
 sciences with applications in environment science & engineering\, and deve
 lopment of resource engineering. In this presentation\, I’ll briefly ove
 rview the scope of nanogeosciences. After that\, I’ll focus on four diff
 erent topics: (1) how to make a full molecular model of crude oil\, which 
 we called it “digital oil”\; (2) how the interfacial structures change
  when salt in aqueous solutions changes\, and what is the typical conseque
 nce in oil production\; (3) how the molecule behaves differently in nanopo
 res (as the case of shale gas system) as revealed by NMR relaxation time m
 easurement\; (4) what are our current efforts for CO2 mineralization using
  first-principles molecular dynamics.\n	In collaboration with Yoshihiro Ma
 suda (the University of Tokyo)\, Toshifumi Matsuoka\, Sumihiko Murata\, Ka
 zuya Kobayashi\, Ryutaro Hibi\, Kanako Tagami\, Nobuhito Yoshitani\, (Kyot
 o University)\, Takeshi Tsuji\, Jihui Jia (Kyushu University)\, and Masato
  Morimoto (AIST).\n\n//indico.ictp.it/event/8018/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8018/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Momentum Distribution and Symmetry Characterization of One-Dimensional Str
 ongly Interacting Fermi Gases"
DTSTART;VALUE=DATE-TIME:20160927T120000Z
DTEND;VALUE=DATE-TIME:20160927T130000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8017@ictp.it
DESCRIPTION:\n	One dimensional (1D) strongly correlated quantum systems ar
 e nowadays the subject of intense theoretical and experimental activity du
 e to the incredible experimental control offered by ultra-cold atoms setup
 s. In such systems\, the momentum distribution is a powerful probe of both
  gas statistics and of the intertwined effect of interactions between part
 icles and the effective dimensionality they move in. A remarkable momentum
  distribution feature\, in all dimensions\, is the presence of universal p
 ower-law tails n(k)~k^{-4} for a gas where interactions can be schematized
  as contact ones (as it is the case for most standard cold gases experimen
 ts). The weight of such tails\, denoted as Tan’s contact\, can be put in
 to relation with several many-body quantities\, ranging from the interacti
 on energy to the depletion rate by inelastic collisions. In this work\, we
  show that such tails also encode precious information about the permutati
 onal symmetry hiding behind the formation of magnetic-like structures in s
 trongly-interacting multi-component Fermi gases.\n	More in details\, we co
 mbine an exact solution at infinite interactions and numerical Matrix-Prod
 uct-State (MPS) simulations at finite interactions\, in order to predict t
 he behavior of the momentum distribution tails for a mixture of k fermioni
 c components under 1D harmonic confinement and interacting among each othe
 r with completely SU(k)-symmetric repulsive contact interactions. We show 
 that both the ground and excited states of the system have a well defined 
 symmetry\, thus indicating magnetic-like properties of the mixture\, and t
 hat such information is fully encoded in the Tan’s contact.\n\n//indico.
 ictp.it/event/8017/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8017/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Condensed Matter & Statistical Physics Seminar: "Multifrac
 tal States in a Self-Consistent Theory of Localization: Analytical Solutio
 n"
DTSTART;VALUE=DATE-TIME:20160928T090000Z
DTEND;VALUE=DATE-TIME:20160928T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8026@ictp.it
DESCRIPTION:\n	We consider disordered tight-binding models which Green's f
 unctions obey the self-consistent  cavity equation. Based on these equati
 ons and the replica trick with the one-step replica symmetry breaking\, we
  derive an analytical expression for the  fractal dimension D_{1} that di
 stinguishes between the extended ergodic (D_{1}=1)\, and extended non-ergo
 dic (multifractal) (0<D_{1}<1) states and prove the existence of the latte
 r in a broad range of parameters as well as existence of transitions betwe
 en the extended ergodic and extended non-ergodic states. The results are a
 pplied to the systems with local tree structure (random regular graphs) an
 d to the systems with infinite connectivity (Rosenzweig-Poter random matri
 x theory). They are potentially important for the problem of many-body loc
 alization\, as the Fock space of interacting systems has a local tree stru
 cture. The non-ergodic extended phase in the many-body systems would imply
  a new state of matter in which usual Boltzmann statistics does not apply 
 as in MBL phases and which in many respects is similar to the glass.\n\n 
 \n\n//indico.ictp.it/event/8026/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8026/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Free Parafermions"
DTSTART;VALUE=DATE-TIME:20161004T090000Z
DTEND;VALUE=DATE-TIME:20161004T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8036@ictp.it
DESCRIPTION://indico.ictp.it/event/8036/
LOCATION:SISSA\, Room 005
URL://indico.ictp.it/event/8036/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter & Statistical Physics Seminar: "Spin Correlation 
 Functions and Quasiparticle Decay" 
DTSTART;VALUE=DATE-TIME:20161005T090000Z
DTEND;VALUE=DATE-TIME:20161005T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8027@ictp.it
DESCRIPTION:\n	We study one-dimensional anisotropic XXZ spin-1/2 model wit
 h ferromagnetic sign of the coupling and z - z exchange constant Jz < Jxy.
 \n	We calculate damping of low-energy excitations with low energies due to
  their scattering from thermal excitation bath with temperature ω << T\, 
 taking into account nonzero curvature of the excitation spectrum. We calcu
 late longitudinal spin-spin correlation function and find the shape of the
  spreading "wave packet".\n\n//indico.ictp.it/event/8027/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8027/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Out-of-Equilibrium Thermodynamics in Ultracold Atoms" 
DTSTART;VALUE=DATE-TIME:20161013T093000Z
DTEND;VALUE=DATE-TIME:20161013T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8032@ictp.it
DESCRIPTION:\n	The study of out-of-equilibrium thermodynamics has received
  a significant thrust thanks to the experimental advances in the control a
 nd manipulation of microscopic systems. Work\, an ubiquitous concept in tr
 aditional thermodynamics\, assumes in this context the role of a stochasti
 c variable whose fluctuations can be ingeniously related to equilibrium pr
 operties\, as is the case of the celebrated Jarzynski equality [1]. In thi
 s talk\, I will revise these concepts and discuss feasible experimental sc
 hemes to directly measure work in cold atomic setups. I will show that the
  interaction between atoms and the light polarisation of a probe laser\, a
 s in atomic ensembles experiments\, allows us to measure work fluctuations
  through a homodyne measurement of the output light [2]. A second scheme a
 llows one to measure the work done on an atomic BEC in a double well poten
 tial when the atomic self-interaction is varied. I will discuss strategies
  based on optimal control techniques to reduce the irreversible work produ
 ction [3].\n	References\n	[1] C. Jarzynski\, Phys. Rev. Lett. 78\, 2690 (1
 997).\n	[2] G. De Chiara\, A. J. Roncaglia\, J. P. Paz\, New J. Phys. 17\,
  035004 (2015)\n	[3] R. G. Lena\, G. M. Palma\, G. De Chiara\, Phys. Rev. 
 A 93\, 053618 (2016)\n\n//indico.ictp.it/event/8032/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8032/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Journal Club: "Bosonization in 2+1 Dimensional CFT's"
DTSTART;VALUE=DATE-TIME:20161026T090000Z
DTEND;VALUE=DATE-TIME:20161026T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8053@ictp.it
DESCRIPTION:\n	We discuss recently formulated dualities between Chern-Simo
 ns-Matter CFT's in 2+1 dimensions. These conjectured dualities relate Cher
 n-Simons gauge theories with fermionic matter to theories with bosonic mat
 ter. We'll briefly try to illustrate different lines of research\, in the 
 high-energy and in the condensed matter communities\, leading to these sur
 prising statements. We will then focus the attention to the case of Abelia
 n gauge theories\, and show how to construct a web of dualities 'composing
 ' in a simple way the basic bosonizations. For instance the boson-boson 'p
 article-vortex duality' of the 80's and a newly formulated fermion-fermion
  duality can be proven in a couple of steps using some Abelian bosonizatio
 n.\n\n//indico.ictp.it/event/8053/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8053/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter & Statistical Physics Seminar: "Full and Efficien
 t Characterization of Non-Markovian Quantum Processes"
DTSTART;VALUE=DATE-TIME:20161102T150000Z
DTEND;VALUE=DATE-TIME:20161102T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8059@ictp.it
DESCRIPTION:\n	In science\, we often want to characterise the processes un
 dergone by a system of interest\; this allows us to both identify the unde
 rlying physics driving the process and to predict what will happen to the 
 system the next time the process occurs. If the state of the system at any
  time depends only on the state of the system at the previous time-step an
 d some predetermined rule then these dynamics are characterised with relat
 ive ease. For instance\, the dynamics of quantum mechanical systems in iso
 lation is described in this way. But\, when a quantum system repeatedly in
 teract with an environment\, the environment often "remembers" information
  about the system's past. This leads to non-Markovian processes\, which de
 pend nontrivially on the state of the system at all times during its evolu
 tion and they are not\, in general\, be easily characterised using convent
 ional techniques. Since the early days of quantum mechanics it has been a 
 challenge to describe non-Markovian processes. Here we will show that usin
 g operational tools from quantum information theory we can fully character
 ise any non-Markovian process. In general the full characterisation is not
  efficient\, as it requires exponentially large number of experiments. To 
 overcome this obstacle we map the full process to a many-body state. We sh
 ow that this can be achieved by using linear\, in the number of time steps
 \, amount of bipartite entanglement. Next\, the state can be measured to a
 ny desired precision\, thus the process can be characterised to any desire
 d precision. Finally\, we define a natural measure for the degree of non-M
 arkovianity.\n\n//indico.ictp.it/event/8059/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8059/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Equilibration and Thermalization in Quantum Systems"
DTSTART;VALUE=DATE-TIME:20161103T103000Z
DTEND;VALUE=DATE-TIME:20161103T120000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8014@ictp.it
DESCRIPTION:\n	This seminar constitutes a basic introduction into modern q
 uantum statistical mechanics and in particular recent developments concern
 ing equilibration and thermalization in closed quantum many-body systems. 
 We will see how equilibration and thermalization can be defined in unitari
 ly evolving and finite dimensional quantum systems\, and under what condit
 ions they can be proved to happen. I will mainly concentrate on analytical
  results\, but also relate to recent experiments\, touch on the large nume
 rical literature on the topic\, and point our some open problems.\n\n//ind
 ico.ictp.it/event/8014/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8014/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Logarithmic Minimal
  Models with Robin Boundary Conditions"
DTSTART;VALUE=DATE-TIME:20161108T100000Z
DTEND;VALUE=DATE-TIME:20161108T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8067@ictp.it
DESCRIPTION://indico.ictp.it/event/8067/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/8067/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Prime Suspects and 
 Coprime Accomplices: Quantum Tales in Number Theory"
DTSTART;VALUE=DATE-TIME:20161115T100000Z
DTEND;VALUE=DATE-TIME:20161115T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8078@ictp.it
DESCRIPTION:\n	Number Theory is a subject full of curiosities\, amusing pr
 oblems and compelling challenges. The purpose of the seminar is to explore
  ” within the context of simple arguments” the rich and elegant interp
 lay that exists between the realms of numbers and the world of quantum mec
 hanics. In particular we discuss the so-called Coprime Quantum Chain\, i.e
 . a strongly correlated lattice system based on the divisibility propertie
 s of the occupation numbers of a Bose gas\, the exponentially large degene
 racy of its ground state and the surprising ability of this quantum system
  to simulate several different classes of universality\, including those o
 f the Ising or the q-state Potts model.\n\n//indico.ictp.it/event/8078/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/8078/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Entanglement Hamilt
 onians in 2D CFT and Shape Dependence of Holographic Entanglement Entropy 
 in AdS(4)/CFT(3)"" 
DTSTART;VALUE=DATE-TIME:20161116T133000Z
DTEND;VALUE=DATE-TIME:20161116T143000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8075@ictp.it
DESCRIPTION://indico.ictp.it/event/8075/
LOCATION:SISSA\, room 005
URL://indico.ictp.it/event/8075/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "On the Spectrum of 
 CFTs with Weakly Broken Higher-spin Symmetry
DTSTART;VALUE=DATE-TIME:20161116T144500Z
DTEND;VALUE=DATE-TIME:20161116T154500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8076@ictp.it
DESCRIPTION://indico.ictp.it/event/8076/
LOCATION:SISSA\, room 005
URL://indico.ictp.it/event/8076/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Optically Driven Many-body Quantum Systems"
DTSTART;VALUE=DATE-TIME:20161117T103000Z
DTEND;VALUE=DATE-TIME:20161117T120000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8015@ictp.it
DESCRIPTION:\n	Recent experiments [1\,2] indicate that selective optical d
 riving of phonons may generate or enhance ordered phases in strongly corre
 lated quantum materials. In my talk I will introduce quantum optically ins
 pired models that may help explain and engineer such phenomena and discuss
  how these may be quantum simulated and investigated in systems of ultraco
 ld atoms. In particular\, I will consider a driven fermionic Hubbard model
  in the strongly correlated limit where the onsite interaction dominates o
 ver the kinetic energy [3]. I will show how driving induced alternating pe
 riodic modulation of lattice site energies changes the nature of the syste
 m into an attractive Luttinger liquid and how this leads to enhanced fermi
 on pairing. I will also discuss laser cooling inspired proposals for using
  optical driving to cool phase fluctuations in Josephson junction arrays w
 hich may be applicable to layered superconductors [4].\n	[1] D. Fausti\, R
 . I. Tobey\, N. Dean\, S. Kaiser\, A. Dienst\, M. C. Hoffmann\, S. Pyon\, 
 T. Takayama\, H. Takagi\, and A. Cavalleri\, Light-Induced Superconductivi
 ty in a Stripe-Ordered Cuprate\, Science 331\, 189 (2011).\n	[2] M. Mitran
 o\, A. Cantaluppi\, D. Nicoletti\, S. Kaiser\, A. Perucchi\, S. Lupi\, P. 
 Di Pietro\, D. Pontiroli\, M. Ricco\, S.R. Clark\, D. Jaksch and A. Cavall
 eri\, Possible light-induced superconductivity in K3C60 at high temperatur
 e\, Nature 530\, 461-464 (2016).\n	[3] J. Coulthard\, S.R. Clark\, S. Al-A
 ssam\, A. Cavalleri and D. Jaksch\, Enhancement of super-exchange pairing 
 in the periodically-driven Hubbard model\, arXiv:1608.03964 (2016).\n	[4] 
 S.J. Denny\, S.R. Clark\, Y. Laplace\, A. Cavalleri and D. Jaksch\, Propos
 ed Parametric Cooling of Bilayer Cuprate Superconductors by Terahertz Exci
 tation\, Phys. Rev. Lett. 114\, 137001 (2015).\n\n//indico.ictp.it/event/8
 015/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8015/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "The Effective Boots
 trap"
DTSTART;VALUE=DATE-TIME:20161122T103000Z
DTEND;VALUE=DATE-TIME:20161122T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8086@ictp.it
DESCRIPTION://indico.ictp.it/event/8086/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/8086/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Condensed Matter & Statistical Physics Seminar: "Theory of
  High-Dimensional Liquids and Glasses - Part I" 
DTSTART;VALUE=DATE-TIME:20161124T140000Z
DTEND;VALUE=DATE-TIME:20161124T153000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8087@ictp.it
DESCRIPTION:\n	The dynamics of liquids\, regarded as strongly-interacting 
 classical particle systems\, remains a field where theoretical description
 s are limited. So far\, there is no microscopic theory starting from first
  principles and using controlled approximations. At the thermodynamic leve
 l\, static equilibrium properties are well understood in simple liquids on
 ly far from glassy regimes. In this seminar\, I will introduce the long-st
 anding problems of the dynamics of classical liquids and the glass transit
 ion. I will review the insights obtained from the study of mean-field spin
  glasses\, giving birth to a generic scenario to glassy systems\, the rand
 om first-order transition (RFOT) theory. On this basis\, I will present th
 e recent derivation of the dynamics of liquids and structural glasses usin
 g the limit of large spatial dimension\, which provides a well-defined mea
 n-field approximation with a clear small parameter. In parallel\, one reco
 vers their thermodynamics through an analogy between dynamics and statics.
  This gives a unifying and consistent view of the phase diagram of these s
 ystems. We showed that this mean-field solution to the structural glass pr
 oblem is an example of the RFOT scenario\, as conjectured thirty years ago
 . These results allow to show that an approximate scale invariance of the 
 system\, relevant to finite-dimensional experiments and simulations\, beco
 mes exact in this limit.\n\n//indico.ictp.it/event/8087/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8087/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Condensed Matter & Statistical Physics Seminar: "Theory of
  High-Dimensional Liquids and Glasses - Part II" 
DTSTART;VALUE=DATE-TIME:20161125T103000Z
DTEND;VALUE=DATE-TIME:20161125T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8088@ictp.it
DESCRIPTION:\n	The dynamics of liquids\, regarded as strongly-interacting 
 classical particle systems\, remains a field where theoretical description
 s are limited. So far\, there is no microscopic theory starting from first
  principles and using controlled approximations. At the thermodynamic leve
 l\, static equilibrium properties are well understood in simple liquids on
 ly far from glassy regimes. In this seminar\, I will introduce the long-st
 anding problems of the dynamics of classical liquids and the glass transit
 ion. I will review the insights obtained from the study of mean-field spin
  glasses\, giving birth to a generic scenario to glassy systems\, the rand
 om first-order transition (RFOT) theory. On this basis\, I will present th
 e recent derivation of the dynamics of liquids and structural glasses usin
 g the limit of large spatial dimension\, which provides a well-defined mea
 n-field approximation with a clear small parameter. In parallel\, one reco
 vers their thermodynamics through an analogy between dynamics and statics.
  This gives a unifying and consistent view of the phase diagram of these s
 ystems. We showed that this mean-field solution to the structural glass pr
 oblem is an example of the RFOT scenario\, as conjectured thirty years ago
 . These results allow to show that an approximate scale invariance of the 
 system\, relevant to finite-dimensional experiments and simulations\, beco
 mes exact in this limit.\n\n//indico.ictp.it/event/8088/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8088/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Entanglement and Me
 trology with Identical Particles"
DTSTART;VALUE=DATE-TIME:20161129T100000Z
DTEND;VALUE=DATE-TIME:20161129T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8096@ictp.it
DESCRIPTION:\n	When dealing with many-body systems made of identical parti
 cles\, the usual definition of separability (absence of quantum correlatio
 ns) appears problematic since the natural particle tensor product structur
 e on which it is based is no longer available. A generalized notion of qua
 ntum correlation (entanglement) not explicitly referring to the set of sys
 tem states is needed and it can be given in terms of the algebra of observ
 ables and of the behaviour of the associated correlation functions. This c
 hange of paradigm has direct applications in quantum technology: it allows
  constructing quantum sensors able to outperform any known\, classical app
 aratus.\n\n//indico.ictp.it/event/8096/
LOCATION:SISSA\, room 128
URL://indico.ictp.it/event/8096/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Trajectory-based Nonadiabatic Dynamics" and "Quantum Computing: Towards th
 e Simulation of Fermionic Systems"
DTSTART;VALUE=DATE-TIME:20161202T103000Z
DTEND;VALUE=DATE-TIME:20161202T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8042@ictp.it
DESCRIPTION://indico.ictp.it/event/8042/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8042/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Real Time Confineme
 nt in a Quantum Quench"" 
DTSTART;VALUE=DATE-TIME:20161206T100000Z
DTEND;VALUE=DATE-TIME:20161206T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8103@ictp.it
DESCRIPTION://indico.ictp.it/event/8103/
LOCATION:SISSA Via Bonomea 265 room 005
URL://indico.ictp.it/event/8103/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: "Accessing Many-Body
  Localized States with a Shifted Action Approach"
DTSTART;VALUE=DATE-TIME:20161213T100000Z
DTEND;VALUE=DATE-TIME:20161213T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8111@ictp.it
DESCRIPTION:\n	We show how the thermodynamic properties of large many-body
  localized systems can be studied using quantum Monte Carlo simulations. T
 o this end we devise a heuristic way of constructing local integrals of mo
 tion of very high quality\, which are added to the Hamiltonian in conjunct
 ion with Lagrange multipliers. The ground state simulation of the shifted 
 Hamiltonian corresponds to a high-energy state of the original Hamiltonian
  in case of exactly known local integrals of motion. We can show that the 
 inevitable mixing between eigenstates as a consequence of non-perfect inte
 grals of motion is weak enough such that the characteristics of many-body 
 localized systems are not averaged out in our approach\, unlike the standa
 rd ensembles of statistical mechanics. Our method paves the way to study h
 igher dimensions but crucially depends on the existence of an extensive se
 t of local integrals of motion.\n\n//indico.ictp.it/event/8111/
LOCATION:SISSA\, Via Bonomea\, room 128
URL://indico.ictp.it/event/8111/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: O
 rder\, Equilibrium\, Memory: The Search for a Quantum Hard Drive and New L
 aws for Non Equilibrium Quantum Statistical Mechanics
DTSTART;VALUE=DATE-TIME:20170112T103000Z
DTEND;VALUE=DATE-TIME:20170112T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8120@ictp.it
DESCRIPTION:\n	The three concepts of the title are closely related in stat
 istical mechanics and condensed matter. Order is an organisational princip
 le that gives a material its macroscopic properties.\n	Equilibration is th
 e most common phenomenon in Nature. There is no other law that is stronger
  than the one that imposes systems to eventually reach equilibrium.\n	On t
 he other hand\, memory is the property of staying away from equilibrium. I
 f one has to store information\, one has to keep a system away from equili
 brium for long times.\n	All these concepts can be illustrated by the funct
 ioning of a device that we use every day: the Hard Drive. In this talk\, I
  will tackle the following question: can one build a Quantum Hard Drive?\n
 	In this talk\, I show that the existence of exotic phases of the matter c
 alled topological phases - which do not rely on the symmetry breaking mech
 anism - provides a mechanism for keeping quantum states alive for a long t
 ime\, and therefore to build a quantum hard drive. This kind of order reli
 es on a topological pattern of entanglement. I will address the problem of
  the survival of Topological Order at finite temperature and after a quant
 um quench. Time permitting\, I will discuss some novel routes towards a st
 able quantum memory\, including many-body localization.\n\n//indico.ictp.i
 t/event/8120/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8120/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Big Surprises from S
 mall Quantum Droplets
DTSTART;VALUE=DATE-TIME:20170117T100000Z
DTEND;VALUE=DATE-TIME:20170117T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8125@ictp.it
DESCRIPTION:\n	We show how spectroscopic experiments on a small Laughlin d
 roplet of rotating bosons can directly demonstrate Haldane fractional excl
 usion statistics of quasihole excitations. In the limit where the confinin
 g potential is very steep we find that the eigenstates have a Jack polynom
 ial structure\, identical to the one-dimensional Calogero-Sutherland model
 \, and have an energy spectrum extremely different from the well known Lut
 tinger liquid edge.\n\n//indico.ictp.it/event/8125/
LOCATION:SISSA (Via Bonomea 263) room 128
URL://indico.ictp.it/event/8125/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: U
 nreasonable Effectiveness of Kinetic Constraints in Glassy Dynamics
DTSTART;VALUE=DATE-TIME:20170119T103000Z
DTEND;VALUE=DATE-TIME:20170119T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8037@ictp.it
DESCRIPTION:\n	Abstract:\n	Sometimes the obvious things are the most obscu
 re. One example is the rigidity of solid bodies which\, especially for amo
 rphous materials\, we do not yet understand. In this talk I will review th
 e Mode-Coupling Theory of glassy dynamics (with its Random First Order Tra
 nsition extension)\, and show that it is equivalent to an alternative appr
 oach based on the notion\, crude and subtle at once\, of kinetic constrain
 t. The emerging universality and the geometrical interpretation of the unu
 sual dynamical scaling laws observed near the glass transition will be dis
 cussed.\n\n//indico.ictp.it/event/8037/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8037/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: The Physics of Jammi
 ng: A Journey from Marble Pebbles Toward Scaling Invariant Field Theory
DTSTART;VALUE=DATE-TIME:20170126T100000Z
DTEND;VALUE=DATE-TIME:20170126T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8132@ictp.it
DESCRIPTION:\n	Jamming is a well know phenomenon that you have experienced
  when the traffic if very heavy. You cannot move because your neighbors bl
 ock you and your neighbors cannot move because you block them. Jamming is 
 a collective phenomenon.\n	Marble pebbles on the beach are one example of 
 jamming. However also for well-levigated pebbles\, friction will plays an 
 important role.\n	Statistical mechanics may be used to study the case of s
 ystems without friction. The most studied case is the hard sphere gas wher
 e the jamming point is reached in the limit of infinite pressure. In the c
 ase of frictionless jamming long-range correlations are present: we have a
  new kind of critical system.\n	Recently the properties of the hard sphere
  gas have been analytically computed in the framework of the mean field ap
 proximation. Non-trivial critical exponents have been found.\n	The behavio
 r of the correlation functions at large distances has not yet computed (it
  is technically very challenging): at the end one should find a new scalin
 g invariant field theory.\n\n//indico.ictp.it/event/8132/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8132/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: A
 utomatic Topography of Complex and Multidimensional Probability Distributi
 ons
DTSTART;VALUE=DATE-TIME:20170202T103000Z
DTEND;VALUE=DATE-TIME:20170202T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8098@ictp.it
DESCRIPTION:\n	We describe an adaptive and parameter-free density estimato
 r that provides an accurate measure of the probability and of its uncertai
 nty for non-uniform samples embedded in high dimensional spaces. The estim
 ator uses only distances between the points and not the coordinates and do
 es not require any assumption on the functional form of the probability di
 stribution. We discuss its accuracy on artificial data sets including prob
 ability values spanning many orders of magnitude. The availability of an e
 rror estimate allows distinguishing genuine density peaks from statistical
  fluctuations due to finite sampling. This is an essential ingredient for 
 robustly inferring the topography of the probability distributions\, namel
 y for finding the location and height of the density peaks and of the sadd
 les between them.\n\n//indico.ictp.it/event/8098/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8098/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Quantum Quenches nea
 r a Quantum Critical Point in 1+1 Dimensions
DTSTART;VALUE=DATE-TIME:20170202T130000Z
DTEND;VALUE=DATE-TIME:20170202T140000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8138@ictp.it
DESCRIPTION:\n	I'll review the perturbative formalism to quantum quenches 
 near a quantum critical point in 1+1 dimensions introduced in [1]. I'll th
 en provide explict applications of it to the Ising and the XYZ spin chain.
  I will finally argue how the mass spectrum of a theory can be inferred fr
 om quantum dynamical experiments and Fourier analysis: these consideration
 s notably apply to the spectrum of Ising field theory in a magnetic field 
 (Zamolodchikov "E8" spectrum).\n\n//indico.ictp.it/event/8138/
LOCATION:SISSA Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8138/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: O
 ptimized STIRAP-type State Transfer in Solid-State Quantum Devices
DTSTART;VALUE=DATE-TIME:20170208T100000Z
DTEND;VALUE=DATE-TIME:20170208T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8136@ictp.it
DESCRIPTION:\n	Stimulated Raman Adiabatic Passage (STIRAP) is a method dev
 eloped more than two decades ago for population transfer in Lambda-type at
 oms using lasers\, with the aim of avoiding an intermediate noisy level. D
 ue to the advantages of being robust\, simple\, and efficient\, STIRAP and
  its theoretical extensions have found a large variety of applications in 
 atomic and molecular physics\, chemistry\, as well as quantum information 
 processing. Most recently\, the coherent control of solid-state devices ha
 s led to remarkable demonstrations of STIRAP with superconducting qubits\,
  optomechanical systems\, and NV centers. However\, differently from atomi
 c systems\, most solid-state quantum devices suffer significant dissipatio
 n\, thus the prolonged operation time of STIRAP (required by adiabaticity)
  becomes a severe drawback. In order to provide physical insight and under
 stand the ultimate power of STIRAP\, we have pursued an analytical treatme
 nt with full consideration of system dissipation. We find that optimizing 
 the transfer time rather than coupling profiles leads to a significant imp
 rovement of the transfer fidelity. The upper bound of the fidelity has bee
 n found as a simple function of system cooperativities. We also provide a 
 systematic approach to reach this upper bound efficiently. By including th
 e dissipation of all the parties\, our results are widely applicable to qu
 antum state engineering and are particularly relevant for solid-state devi
 ces.\n\n//indico.ictp.it/event/8136/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8136/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: Q
 uantum Phase Transition in the Anisotropic Rabi Model
DTSTART;VALUE=DATE-TIME:20170216T103000Z
DTEND;VALUE=DATE-TIME:20170216T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8137@ictp.it
DESCRIPTION:\n	The quantum Rabi model (QRM) describes a two-level system i
 nteracting with a bosonic mode and it is one of the simplest models of lig
 ht-matter interactions. If the coupling strength is small\, the QRM can be
  approximated by the Jaynes-Cummings (JC) model\, where counter-rotating t
 erms are neglected. Although these models have only few degrees of freedom
 \, recent work has shown that a suitable limit of both the QRM [1] and JC 
 model [2] displays a quantum phase transition similar to Dicke superradian
 ce. In this talk we extend these results to the anisotropic QRM\, where ro
 tating- and counter-rotating terms have different weights. This question i
 s important since typical realizations of strong light-matter interactions
  (e.g.\, in circuit QED) naturally have finite anisotropy. Furthermore\, t
 he quantum phase transition has different universal properties in the know
 n JC and isotropic QRM limits. Through a combination of analytic and numer
 ical approaches we compute phase diagram\, scaling functions\, and critica
 l exponents\, which allows us to establish that the universality class wit
 h finite anisotropy is the same of the QRM. We also find other interesting
  features\, like a superradiance-induced freezing of the effective mass an
 d discontinuous scaling functions in the JC limit.\n	[1] M.-J. Hwang\, R. 
 Puebla\, and M. B. Plenio\, Phys. Rev. Lett. 115\, 180404 (2015).\n	[2] M.
 -J. Hwang and M. B. Plenio\, Phys. Rev. Lett. 117\, 123602 (2016).\n\n//in
 dico.ictp.it/event/8137/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8137/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: A Protocol for Reach
 ing Equilibrium Arbitrary Fast
DTSTART;VALUE=DATE-TIME:20170221T100000Z
DTEND;VALUE=DATE-TIME:20170221T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8158@ictp.it
DESCRIPTION:\n	When a control parameter of a system is suddenly changed\, 
 the accessible phase space changes too and the system needs its characteri
 stic relaxation time to reach the final equilibrium distribution. An impor
 tant and relevant question is whether it is possible to travel from an equ
 ilibrium state to another in an arbitrary time\, much shorter than the nat
 ural relaxation time. Such strategies are reminiscent of those worked out 
 in the recent field of Shortcut to Adiabaticity\, that aim at developing p
 rotocols\, both in quantum and in classical regimes\, allowing the system 
 to move as fast as possible from one equilibrium position to a new one\, p
 rovided that there exist an adiabatic transformation relating the two. Pro
 of of principle experiments have been carried out for isolated systems. In
 stead in open system the reduction of the relaxation time\, which is frequ
 ently desired and necessary\, is often obtained by complex feedback proces
 ses.\n	In this talk\, we present a protocol\, named Engineering (ESE)\, th
 at shortcuts time-consuming relaxations. We tested experimentally this pro
 tocol on a Brownian particle trapped in an optical potential first and the
 n on an AFM cantilever. We show that applying a specific driving\, one can
  reach equilibrium in an arbitrary short time. We also estimate the energe
 tic cost to get such a time reduction.\n	Beyond its fundamental interest\,
  the ESE method paves the way for applictions in micro and nano devices\, 
 in high speed AFM\, or in monitoring mesoscopic chemical or biological pro
 cess.\n	References:\n	(1) Engineered Swift Equilibration\, Ignacio A. Mart
 inez\; Artyom Petrosyan\; David GuŽry-Odelin\; Emmanuel Trizac\; Sergio C
 iliberto\, Nature Physics\, Vol 12\, 843 (2016).\n	(2) Arbitrary Fast Modu
 lation of an Atomic Force Microscope\, Anne Le Cunuder\; Ignacio A. Martin
 ez\; Artyom Petrosyan\; David GuŽry-Odelin\; Emmanuel Trizac\; Sergio Cil
 iberto. Applied Physics Letters\, 109\, 113502 (2016)\n\n//indico.ictp.it/
 event/8158/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8158/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Exploring Far-from-E
 quilibrium Physics of Dissipative Spin Systems with Highly Excited Atoms
DTSTART;VALUE=DATE-TIME:20170228T100000Z
DTEND;VALUE=DATE-TIME:20170228T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8178@ictp.it
DESCRIPTION:\n	In recent years cold atomic gases have been established as 
 a versatile platform for the study of quantum many-body phenomena. Especia
 lly atoms excited to highly-lying electronic states --- so-called Rydberg 
 atoms --- offer rather intriguing possibilities for the exploration of str
 ongly correlated dynamics.\n	In this talk I will show that the out-of-equi
 librium behaviour of these systems is governed by emergent kinetic constra
 ints\, which are often used to mimic dynamical arrest or excluded volume e
 ffects in idealised models of glass forming substances. In Rydberg gases e
 xposed to a noisy environment these constraints emerge naturally and lead 
 to a remarkably rich dynamics although the final stationary state might be
  entirely uncorrelated and trivial.\n	Dynamical features include a self-si
 milar relaxation\, the existence of correlated growth as well as the emerg
 ence of non-equilibrium phase transitions of the directed percolation univ
 ersality class\, whose experimental observation so far has been challengin
 g. Moreover\, Rydberg gases offer an opportunity for the systematic explor
 ation of the role of competing quantum and classical dynamical effects on 
 the aforementioned non-equilibrium phase transitions.\n\n//indico.ictp.it/
 event/8178/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8178/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: S
 ustainable and Challenging Catalytic Applications of Well-defined Nanocata
 lysts
DTSTART;VALUE=DATE-TIME:20170302T103000Z
DTEND;VALUE=DATE-TIME:20170302T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8099@ictp.it
DESCRIPTION:\n	Heterogeneous catalysis has grown from an art to a science.
  Numerous catalytic materials are being proposed every day in the literatu
 re\, with surprising and exciting new reactivities being disclosed\, and i
 nteresting novel concepts being proposed. The study of catalytic processes
  starting from better defined materials that are tuned in morphology\, com
 position and shape is opening new perspectives for catalyst design. For ex
 ample\, use of nanocrystals in CO oxidation turned out to be crucially dep
 endent on the interfacial contact of the support (ceria) with the metal na
 noparticle active sites [1]\, while valorization of biomasses were employe
 d as reactants for catalysis by carbon-supported\, Pt and PtCo nanocrystal
 s (NCs) with controlled size and composition [2]. A particular type of str
 ucture is represented by nanosized core-shell phases\, which proved to be 
 superior catalysts in several catalytic reactions\, such as methane combus
 tion [3] as well as photocatalytic hydrogen evolution from biomass-derived
  substrates [4] or electrocatalytic water electrolysis [5] when integrated
  with multi-walled carbon nanotubes. Every day\, nanotechnology applied to
  heterogeneous catalysts is creating new opportunities for important break
 throughs.\n	[1] Cargnello M. et al.\, Science 341 (2013) 771.\n	[2] Luo J.
 et al.\, ACS Catal 6 (2016) 4095.\n	[3] Cargnello M.\, et al. Science 337 
 (2012) 713.\n	[4] Beltram A. et al\, Green Chem. (2017) DOI: 10.1039/C6GC0
 1979J\n	[5] Valenti G.\, et al.\, Nature Commun. (2016) article number: 13
 549\n\n//indico.ictp.it/event/8099/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8099/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Seminar (Energy): Multifunctional Materials for Solar Technol
 ogies
DTSTART;VALUE=DATE-TIME:20170306T103000Z
DTEND;VALUE=DATE-TIME:20170306T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8177@ictp.it
DESCRIPTION:\n	As the age of fossil fuels is coming to an end\, now more t
 han ever there is the need for more efficient and sustainable renewable en
 ergy technologies. This presentation will give an overview on recent devel
 opments in solar technologies that may address\, in part the energy challe
 nge. In particular\, nanostructured materials synthesized via the bottom
 –up approach present an opportunity for future generation low cost manuf
 acturing of devices [1]. We demonstrate various strategies to control nano
 structure assembly\, to design and synthesize functional materials that wi
 ll help address the energy challenge. We study\, in particular\, multifunc
 tional materials\, namely materials that exhibit more than one functionali
 ty\, and structure/property relationships in such systems\, including for 
 example: (i) control of size and luminescence properties of semiconductor 
 nanostructures\, synthesized by reactive laser ablation [2]\; (ii) we devi
 sed new strategies for synthesizing multifunctional nanoscale materials to
  be used for applications electronics and photovoltaics [3-26].\n\n	\n	Ref
 erences [1] F. Rosei\, J. Phys. Cond. Matt. 16\, S1373 (2004)\;\n	[2] D. R
 iabinina et al.\, Phys. Rev. B 74\, 075334 (2006)\;\n	[3] C. Yan et al.\, 
 Adv. Mater. 22\, 1741 (2010)\;\n	[4] C. Yan et al.\, J. Am. Chem. Soc. 132
 \, 8868 (2010)\;\n	[5] R. Nechache et al.\, Adv. Mater. 23\, 1724 (2011)\;
 \n	[6] R. Nechache et al.\, Appl. Phys. Lett. 98\, 202902 (2011)\;\n	[7] G
 . Chen et al.\, Chem. Comm. 48\, 8009 (2012)\;\n	[8] G. Chen et al.\, Adv.
  Func. Mater. 22\, 3914 (2012)\;\n	[9] R. Nechache et al.\, Nanoscale 4\, 
 5588 (2012)\;\n	[10] J. Toster et al.\, Nanoscale 5\, 873 (2013)\;\n	[11] 
 T. Dembele et al.\, J. Power Sources 233\, 93 (2013)\;\n	[12] S. Li et al.
 \, Chem. Comm. 49\, 5856 (2013)\;\n	[13] T. Dembele et al.\, J. Phys. Chem
 . C 117\, 14510 (2013)\;\n	[14] R. Nechache et al.\, Nature Photonics 9\, 
 61 (2015)\;\n	[15] R. Nechache et al.\, Nanoscale 8\, 3237 (2016)\;\n	[16]
  R. Adhikari et al. Nano Energy 27\, 265 (2016)\;\n	[17] H. Zhao et al.\, 
 Small 12\, 3888 (2016)\;\n	[18] J. Chakrabartty et al.\, Nanotechnology 27
 \, 215402 (2016)\;\n	[19] D. Benetti et al.\, J. Mater. Chem. C 4\, 3555 (
 2016)\;\n	[20] K. Basu et al.\, Sci. Rep. 6\, 23312 (2016)\;\n	[21] Y. Zho
 u et al.\, Adv. En. Mater. 6\, 1501913 (2016)\;\n	[22] H. Zhao et al.\, Na
 noscale 8\, 4217 (2016)\;\n	[23] L. Jin et al.\, Adv. Sci. 3\, 1500345 (20
 16)\;\n	[24] H. Zhao et al.\, Small 11\, 5741 (2015)\;\n	[25] S. Li et al.
 \, Small 11\, 4018 (2015)\;\n	[26] K.T. Dembele et al.\, J. Mater. Chem. A
  3\, 2580 (2015).\n\n//indico.ictp.it/event/8177/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8177/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: C
 harge Thermopower and Conductance in Interacting Quantum Dot Structures 
DTSTART;VALUE=DATE-TIME:20170309T103000Z
DTEND;VALUE=DATE-TIME:20170309T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8159@ictp.it
DESCRIPTION:\n	Abstract:\n	Charge thermopower in an interacting quantum do
 t coupled to the leads via assisted hopping modifies the coupling to the t
 wo-particle state\, which shifts the Kondo exchange coupling constant and 
 exponentially reduces or enhances the Kondo temperature\, breaks the parti
 cle-hole symmetry\, and consequently strongly affects the thermopower. The
  gate-voltage and temperature dependence of the transport properties is di
 scussed in various regimes. For a particular value of the assisted hopping
  parameter a peculiar discontinuous behaviour and very high Seebeck coeffi
 cient is found [1]. Similar discontinuous behaviour is found in a triple q
 uantum dot system exhibiting regular and singular Fermi liquid transitions
  [2].\n	References:\n	[1] Effect of assisted hopping on thermopower in an 
 interacting quantum dot\, S.B. Tooski\, A. Ramsak\, B.R. Bulka\, and R. Zi
 tko\, New J. Phys. 16\, 055001 (2014).\n	[2] Regular and singular Fermi li
 quid in triple quantum dots: Coherent transport studies\, S.B. Tooski\, A.
  Ramsak\, and B.R. Bulka\, Physica E: Low-dimensional Systems and Nanostru
 ctures 75\, 345 (2016).\n\n//indico.ictp.it/event/8159/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8159/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Quantum Correlations
 : Equilibrium and Non-Equilibrium Aspects"
DTSTART;VALUE=DATE-TIME:20170314T100000Z
DTEND;VALUE=DATE-TIME:20170314T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8187@ictp.it
DESCRIPTION:\n	In quantum systems correlations can take forms which are im
 possible in classical mechanics. The most famous\, yet elusive form of qua
 ntum correlation is represented by entanglement\, a property well defined 
 and investigated for pure states\, and envisioned as a resource for nearly
  all technological tasks harnessing quantum many-body systems. In the real
  life of mixed states incoherent fluctuations appear in the game\, making 
 the distinction of quantum vs. classical correlations less sharp. At the s
 ame time\, the exquisite level of control achieved by experiments in atomi
 c\, molecular and optical (AMO) physics enables nowadays to engineer corre
 lated phases of quantum many-body systems\, so that the ability to charact
 erize and control quantum correlations becomes a fundamental question.\n	I
 n this seminar I will try to offer a broad overview of the theoretical imp
 ortance of quantum correlations\, starting from their very definition - to
  which we contributed recently with a statistical physics approach allowin
 g to calculate them in generic systems\, and potentially to measure them f
 or a large class of quantum many-body systems relevant to experiments in A
 MO physics and solid-state physics. I will moreover discuss the centrality
  of quantum correlations in the dynamics that leads a closed quantum syste
 m to relax to an equilibrium state\, contrasting the case of short-range i
 nteractions with that of long-range ones: this contrast allows to enlighte
 n the role of elementary excitations (and in particular of their dispersio
 n relation) as the "carriers" of quantum correlations.\n\n//indico.ictp.it
 /event/8187/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8187/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: Q
 uantum Optics of Chiral Networks with Atoms\, Photons and Spins
DTSTART;VALUE=DATE-TIME:20170316T103000Z
DTEND;VALUE=DATE-TIME:20170316T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8113@ictp.it
DESCRIPTION:\n	Chiral Networks consist of nodes (for instance two-level at
 oms)\, coupled to chiral waveguides. By chiral coupling we mean an asymmet
 ric coupling of the nodes to the left and right propagating guided modes. 
 Chiral networks can also be realized using two-dimensional topological mat
 erials with spins or photons.\n	Remarkably\, the driven dissipative dynami
 cs of the network can be described by a chiral Master Equation\, which pre
 dicts steady states in form of pure states consisting of quantum dimers.\n
 	Quantum networks have also applications is the context of Quantum informa
 tion. In this talk\, I will present two results showing how to achieve rob
 ust Quantum Communication protocols between two nodes of an imperfect\, "d
 irty"\, chiral quantum network.\n	I will first present a model of topologi
 cally protected chiral quantum network\, which can be realized with Rydber
 g atoms\, and show how to achieve Quantum Communication in the presence of
  defects.\n	In a second part\, I will discuss the effect of noise in Quant
 um networks. I will present a new protocol which allows faithful transfer 
 of quantum states between two distant cavities of a quantum network connec
 ted by a noisy waveguide. This is a result of the linearity of the overall
  system (as coupled harmonic oscillators)\, which allows injected noise pr
 opagating ballistically in the waveguide\, and acting on both cavities to 
 drop out by quantum interference. Our proposed protocol and quantum optica
 l setups can be realized with state of the art experimental techniques in 
 both photonic and phononic quantum circuits.\n	P Lodahl 2017 Nature 541\, 
 473 480\n	C Dlaska et al 2017 Quantum Sci. Technol. 2 015001\n	B Vermersch
  et al 2017 arXiv:1611.10240\n\n//indico.ictp.it/event/8113/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8113/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Liouville Field Theo
 ry and Log-correlated Random Energy Models
DTSTART;VALUE=DATE-TIME:20170321T100000Z
DTEND;VALUE=DATE-TIME:20170321T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8171@ictp.it
DESCRIPTION:\n	I will discuss the exact mapping between the Liouville fiel
 d theory\, introduced in the context of 2D quantum gravity\, and a broad c
 lass of glassy models displaying a freezing transition. Exact asymptotics 
 of Liouville field theory correlation functions provide predictions of new
  critical behaviours and in particular extend to arbitrary temperature a r
 ecent work of Derrida and Mottishaw on the directed polymer on a Cayley tr
 ee.\n\n//indico.ictp.it/event/8171/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8171/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Quantum Control on a
 n Atom Chip (Speaker: Francesco Saverio Cataliotti\, LENS\, Florence)
DTSTART;VALUE=DATE-TIME:20170328T090000Z
DTEND;VALUE=DATE-TIME:20170328T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8206@ictp.it
DESCRIPTION:\n	We produce a Bose-Einstein condensate of 87Rb with an Atom-
 Chip. The Atom-Chip is also equipped with RF sources for coherent transfer
  of atoms between internal states in order to realize an atom interferomet
 er [1]. We demonstrate a novel scheme for the tomographic reconstruction o
 f atomic states that combines the inherent stability of the atom chip setu
 p with the flexibility of optimization schemes [2]. This scheme allowed co
 nfirming of the superb control on parameters allowed by the experimental s
 et-up and put it to use on improved control algorithms to realise arbitrar
 y superposition states [3]. In the same set-up we can further control the 
 available Hilbert space for quantum evolution exploiting Quantum Zeno dyna
 mics [4]. Finally we show a possible route for controlling the coupling to
  an environment by experimentally demonstrating the stochastic Quantum Zen
 o effect\; i.e. we prove an ergodicity relation between the survival proba
 bilities of different stochastic series that respectively correspond to ti
 me and ensemble averages [5].\n	These experiments prove that Atom Chips ca
 n be ideal tools for the control of quantum dynamics opening a new way to 
 realizing novel quantum logical gates.\n	References\n	[1] J. Petrovic\, et
  al.\, New J. Phys. 15 (4)\, 043002 (2013)\n	[2] C. Lovecchio\, et al.\, N
 ew J. Phys. 17\, 093024\, (2015)\n	[3] C. Lovecchio\, et al.\, Phys. Rev. 
 A 93\, 010304(R) (2016)\n	[4] F. Schaefer\, et al.\, Nature Communications
  5:3194 (2014)\n	[5] S. Gherardini\, et al.\, Quantum Sci. Technol. 2\, 01
 5007 (2017)\n\n//indico.ictp.it/event/8206/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8206/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: W
 hat I Cannot Compute I Do Not Understand: Fathoming Heat Transport from th
 e Struggle to Simulate It"
DTSTART;VALUE=DATE-TIME:20170330T093000Z
DTEND;VALUE=DATE-TIME:20170330T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8110@ictp.it
DESCRIPTION:\n	The computation of atomic (i.e. non electronic) heat-transp
 ort coefficients from the Green-Kubo theory of linear-response is currentl
 y hampered by two misconceptions. First\, the linear-response theory of he
 at transport has long been deemed incompatible with modern simulation tech
 niques based on electronic-structure theory\, because the quantum mechanic
 al heat flux that enters the Green-Kubo formula is inherently ill defined.
  Second\, it is commonly thought that the application of this theory would
  require very long molecular-dynamics simulations\, much longer in fact th
 an the typical heat-flux auto-correlation times one is required to evaluat
 e. In this talk I will described the efforts done at SISSA over the past f
 ew years to overcome this state of affairs\, which resulted in a methodolo
 gy allowing us to compute heat transport coefficients from equilibrium ab-
 initio molecular dynamics\, no less than in a deeper understanding of the 
 theory of hydrodynamic fluctuations and their numerical analysis through t
 he statistical theory of stationary time series.\n\n//indico.ictp.it/event
 /8110/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8110/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Series of Lectures:  "HOW TO SOLVE IT" (1) A Bird Eye View
  of Low Dimensional Statistical Systems
DTSTART;VALUE=DATE-TIME:20170403T140000Z
DTEND;VALUE=DATE-TIME:20170403T153000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8193@ictp.it
DESCRIPTION://indico.ictp.it/event/8193/
LOCATION: Leonardo Building - Budinich Lecture Hall
URL://indico.ictp.it/event/8193/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Series of Lectures:  "HOW TO SOLVE IT" (2) The Power of Po
 wer Laws: Conformal Field Theories
DTSTART;VALUE=DATE-TIME:20170404T140000Z
DTEND;VALUE=DATE-TIME:20170404T153000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8194@ictp.it
DESCRIPTION://indico.ictp.it/event/8194/
LOCATION: Leonardo Building - Budinich Lecture Hall
URL://indico.ictp.it/event/8194/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Series of Lectures:  "HOW TO SOLVE IT" (3)  In the Vicinit
 y of Critical Points
DTSTART;VALUE=DATE-TIME:20170410T140000Z
DTEND;VALUE=DATE-TIME:20170410T153000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8195@ictp.it
DESCRIPTION://indico.ictp.it/event/8195/
LOCATION: Leonardo Building - Budinich Lecture Hall
URL://indico.ictp.it/event/8195/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Floquet Topological 
 Insulators? A Few Warnings.
DTSTART;VALUE=DATE-TIME:20170411T090000Z
DTEND;VALUE=DATE-TIME:20170411T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8218@ictp.it
DESCRIPTION:\n	I will give an informal pre-Easter-holiday presentation of 
 recent work\, done with Lorenzo Privitera (and also with Angelo Russomanno
 )\, on out-of-equilibrium periodic driving of closed quantum systems (Floq
 uet physics)\, which have overlap with the field of ``topological quantum 
 matter''. I will concentrate on two examples: a periodically driven graphe
 ne [1] (which leads to the Haldane model physics) and Thouless topological
  adiabatic pumping of a one-dimensional insulator [3\,4\,5\,6]. During the
  talk\, I will try to stress a few non-equilibrium aspects that should be 
 kept in mind when thinking of "Floquet Topological Insulators": this\, to 
 spell it out\, explains the "warnings" in the title.\n\n//indico.ictp.it/e
 vent/8218/
LOCATION:SISSA\, Via Bonomea 265\, room128
URL://indico.ictp.it/event/8218/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Series of Lectures:  "HOW TO SOLVE IT" (4) Quasi-Particle 
 Excitations and their Scattering
DTSTART;VALUE=DATE-TIME:20170412T140000Z
DTEND;VALUE=DATE-TIME:20170412T153000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8196@ictp.it
DESCRIPTION://indico.ictp.it/event/8196/
LOCATION: Leonardo Building - Budinich Lecture Hall
URL://indico.ictp.it/event/8196/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Thermodynamics and O
 rder Beyond Equilibrium - - The Physics of Periodically Driven Quantum Sys
 tems
DTSTART;VALUE=DATE-TIME:20170418T090000Z
DTEND;VALUE=DATE-TIME:20170418T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8167@ictp.it
DESCRIPTION:\n	The field of thermodynamics is one of the crown jewels of c
 lassical physics. However\, only comparatively recently\, due to the adven
 t of experiments in cold atomic systems with long coherence times\, has ou
 r detailed understanding of its connection to quantum statistical mechanic
 s seen remarkable progress.\n	Extending these ideas and concepts to the no
 n-equilibrium setting is a challenging topic\, in itself of perennial inte
 rest. Here\, we study perhaps the simplest non-equilibrium class of quantu
 m problems\, namely Floquet systems\, i.e. systems whose Hamiltonians depe
 nd on time periodically\, $H(t + T) = H(t)$. For these\, there is no energ
 y conservation\, and hence not even a natural concept of temperature.\n	We
  find that it is nonetheless possible to identify several fundamentally di
 stinct thermodynamic ensembles. We also ask if there exists a sharp notion
  of a phase in such driven\, interacting quantum systems. Disorder turns o
 ut to play a crucial role\, enabling the existence of states which are str
 aightforward analogues of equilibrium states with broken symmetries and to
 pological order\, while others--genuinely new to the Floquet problem--are 
 characterized by a combination of order and non-trivial periodic dynamics.
 \n	This work was done in collaboration with Arnab Das\, Vedika Khemani\, A
 chilleas Lazarides and Shivaji Sondhi.\n	References: Phys. Rev. Lett. 112\
 , 150401 (2014)\; Phys. Rev. E 90 \, 012110 (2014)\; Phys. Rev. Lett. 115\
 , 030402 (2015)\; Phys. Rev. Lett. 116\, 250401 (2016)\n\n//indico.ictp.it
 /event/8167/
LOCATION: Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8167/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Series of Lectures:  "HOW TO SOLVE IT" (5) Integrability: 
 The Way to Exact Computations
DTSTART;VALUE=DATE-TIME:20170419T140000Z
DTEND;VALUE=DATE-TIME:20170419T153000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8197@ictp.it
DESCRIPTION://indico.ictp.it/event/8197/
LOCATION: Leonardo Building - Budinich Lecture Hall
URL://indico.ictp.it/event/8197/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Special Series of Lectures:  "HOW TO SOLVE IT" (6) How to Handle t
 he Breaking of Integrability
DTSTART;VALUE=DATE-TIME:20170426T140000Z
DTEND;VALUE=DATE-TIME:20170426T153000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8198@ictp.it
DESCRIPTION://indico.ictp.it/event/8198/
LOCATION:ICTP Leonardo Building - Budinich Lecture Hall
URL://indico.ictp.it/event/8198/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: T
 opological Quantum Matter Far from Equilibrium
DTSTART;VALUE=DATE-TIME:20170427T093000Z
DTEND;VALUE=DATE-TIME:20170427T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8131@ictp.it
DESCRIPTION:\n	Topological states of quantum matter such as topological in
 sulators and superconductors have been an active field of research in phys
 ics for many years. The recent experimental progress on their realization 
 with ultracold atomic gases raises natural questions about the notion of t
 opological quantum matter far from thermal equilibrium. In this talk\, we 
 present our theoretical findings in this context.\n	We first discuss the n
 on-equilibrium Hall response of a system initialized in a topologically tr
 ivial state before its Hamiltonian is ramped into a Chern insulator phase\
 , comparing the coherent dynamics with effects of dephasing. In the second
  part of the talk\, we discuss non-equilibrium properties of driven system
 s. In particular\, we show how a perfect spin momentum locking\, so far on
 ly known from edge states of two-dimensional topological insulators can em
 erge in the stroboscopic dynamics of one-dimensional Floquet lattice syste
 ms. Finally\, we discuss dynamically defined topological quantum numbers t
 hat have no non-equilibrium counterpart\, and report on their very recent 
 experimental observation.\n\n//indico.ictp.it/event/8131/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8131/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: Anharmonic Effects on Material Propertie
 s at High Temperatures from Ab Initio Molecular Dynamics Simulations
DTSTART;VALUE=DATE-TIME:20170502T120000Z
DTEND;VALUE=DATE-TIME:20170502T130000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8208@ictp.it
DESCRIPTION:\n	Ab initio molecular dynamics simulation technique is a prom
 ising tool to study various properties of vibrational spectra\, entropy\, 
 free energy\, etc. even at high temperatures. With the harmonic phonon mod
 el\, all interatomic forces are treated as purely harmonic so that the equ
 ilibrium distance between atoms is independent of temperature. At the low 
 temperature regime\, this model\, commonly used in most quantum chemistry 
 codes\, can approximately model vibrational properties and free energetics
 . At higher temperatures\, however\, the harmonic model can break down sin
 ce it cannot explain thermal expansion\, where the role of anharmonicity b
 ecomes very important in the description and interpretation of the system.
  To better describe properties of systems at high temperatures\, the quasi
 -harmonic approximation can be. In this talk\, I will present a few exampl
 es to show how the quasi-harmonic approximation is used to rigorously eval
 uate the vibrational density of states at elevated temperatures. From this
 \, the quantitative evaluation of thermodynamic properties such as entropy
 \, enthalpy\, free energy\, and equilibrium constants can then be inferred
 . A variety of systems ranging from ethanol-adsorption in zeolites (cataly
 sis)\,[1] water/scCO2/mineral interfaces (carbon sequestration)\,[2] and T
 c-incorporation in magnetite (nuclear remediation)[3] are used to illustra
 te the power of this approach.\n	[1] Alexopoulos\, K.\; Lee\, M.-S.\; Liu\
 , Y.\; Zhi\, Y.\; Liu\, Y.\; Reyniers\, M.-F.\; Marin\, G. B.\; Glezakou\,
  V.-A.\; Rousseau\, R.\; Lercher\, J. A. J. Phys. Chem. C 120\, 7172 (2016
 ).\n	[2] Lee\, M.-S.\; McGrail\, B. P.\; Rousseau\, R.\; Glezakou\, V.-G. 
 Sci. Rep. 5\, 14857 (2015).\n	[3] Lee\, M.-S.\; Um\, W.\; Wang\, G.\; Krug
 . A. A.\; Lukens\, W. W.\; Rousseau\, R.\; Glazakou\, V.-A. Nat. Commun. 7
 \, 12067 (2016).\n\n//indico.ictp.it/event/8208/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8208/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Non-Linear Responses
 \, Soft Modes and the True Nature of Glasses
DTSTART;VALUE=DATE-TIME:20170502T090000Z
DTEND;VALUE=DATE-TIME:20170502T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8212@ictp.it
DESCRIPTION:\n	In understanding the nature and the formation of glasses li
 e questions that go beyond the physics of such amorphous materials and are
  relevant for many branches of science from physics to mathematics\, compu
 ter science\, and biology. After a general introduction to the field of gl
 assy systems\, I will show that strong non-linear responses to small pertu
 rbations and the proliferation of soft-modes are key signatures of glassin
 ess. I will explain how we used these features to probe the nature of the 
 glass transition and to reveal that amorphous solids may undergo a new kin
 d of phase transition at which standard elasticity breaks down.\n\n//indic
 o.ictp.it/event/8212/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8212/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: M
 echanical Signatures of the Current Blockade Instability in Suspended Carb
 on Nanotubes
DTSTART;VALUE=DATE-TIME:20170511T093000Z
DTEND;VALUE=DATE-TIME:20170511T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8188@ictp.it
DESCRIPTION:\n	Transport measurements allow sensitive detection of nanomec
 hanical motion of suspended carbon nanotubes. It has been predicted that w
 hen the electromechanical coupling is sufficiently large a bistability wit
 h a current blockade appears. Unambiguous observation of this transition b
 y current measurements may be difficult. Instead\, we investigate the mech
 anical response of the system\, namely\, the displacement spectral functio
 n\, the linear response to a driving\, and the ring-down behavior. We find
  that by increasing the electromechanical coupling the peak in the spectra
 l function broadens and shifts at low frequencies while the oscillator dep
 hasing time shortens. These effects are maximum at the transition where no
 nlinearities dominate the dynamics. These strong signatures open the way t
 o detect the blockade transition in devices currently studied by several g
 roups.\n\n//indico.ictp.it/event/8188/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8188/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Non-equilibrium Dyna
 mics in Isolated Quantum Systems "The Many-body Spectrum"
DTSTART;VALUE=DATE-TIME:20170523T090000Z
DTEND;VALUE=DATE-TIME:20170523T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8242@ictp.it
DESCRIPTION:\n	Abstract: Quantum many-body physics has traditionally focus
 ed on equilibrium properties and low-energy excitations. However\, in rece
 nt years\, motivated by novel experimental possibilities\, the study of qu
 antum matter far from equilibrium is emerging as an active and exciting fi
 eld of research. In the absence of external mechanisms for reaching equili
 brium\, the behavior of an isolated quantum system poses many new challeng
 es to our understanding of quantum matter. I will motivate the study of qu
 antum dynamics in isolated systems\, contrast with equilibrium physics and
  dissipative dynamics\, and present a few examples of such dynamical pheno
 mena. In particular\, I will highlight the role and some properties of the
  many-body eigenspectrum.\n\n//indico.ictp.it/event/8242/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8242/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: Fundamental Limit for Cooling of Driven 
 Quantum Systems
DTSTART;VALUE=DATE-TIME:20170524T090000Z
DTEND;VALUE=DATE-TIME:20170524T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8229@ictp.it
DESCRIPTION:\n	Abstract: I will study the asymptotic behavior of a class o
 f quantum refrigerators consisting of a parametrically driven network of o
 scillators which is coupled with an arbitrary number of thermal reservoirs
 . I will describe the fundamental process that enforces the validity of th
 e third law of thermodynamics for this type of systems. This process\, whi
 ch prevents us from cooling a cold reservoir below a certain (non universa
 l) temperature\, consists of the non resonant creation of excitations pair
 s in the reservoirs and it is closely related with the dynamical Casimir e
 ffect. I will show that the results can be applied  to understand\, in a 
 simple way\, the fundamental limits for laser cooling of a single oscillat
 or.\n\n//indico.ictp.it/event/8229/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8229/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: W
 hat We Do and Don't Know about Water at Interfaces - Molecular Level Insig
 ht from Computer Simulation
DTSTART;VALUE=DATE-TIME:20170525T093000Z
DTEND;VALUE=DATE-TIME:20170525T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8109@ictp.it
DESCRIPTION:\n	There are few molecules\, if any\, more important than wate
 r. Yet remarkably little is known about how it interacts with solid surfac
 es\, particularly at the all important atomic-level. This is true despite 
 widespread general interest and compelling environmental and economic ince
 ntives. For example\, water-solid interactions play a crucial role in the 
 activity of fuel cells\, the chemistry of the atmosphere\, global warming\
 , corrosion\, catalysis\, the operation of membranes\, and so on. In this 
 talk I will discuss some of our recent work in which we have been using cl
 assical and quantum molecular dynamics approaches as well as advanced elec
 tronic structure methods to better understand the structural and dynamical
  properties of water-solid interfaces. This will include work focused on u
 nderstanding the formation of ice [1-3]\, confined water in nanocapiliarie
 s [4]\, and water diffusion and friction [5-7].\n	1. M. Fitzner\, G. C. So
 sso\, S. J. Cox and A. Michaelides\, J. Am. Chem. Soc. 137\, 13658 (2015)\
 n	2. G. Sosso et al.\, J. Phys. Chem. Lett. 7\, 2350 (2015)\n	3. A. Kisele
 v et al\, Science (2016)\; DOI: 10.1126/science.aai8034\n	4. J. Chen\, G. 
 Schusteritsch\, C. J. Pickard\, C. G. Salzmann and A. Michaelides\, Phys. 
 Rev. Lett. 116\, 025501 (2016)\n	5. G. Tocci\, L. Joly and A. Michaelides\
 , Nano Lett. 14\, 6872 (2014)\n	6. M. Ma\, G. Tocci\, A. Michaelides and G
 . Aeppli\, Nature Materials 15\, 66 (2016)\n	7. L. Joly\, G. Tocci\, S. Me
 rabia\, and A. Michaelides\, J. Phys. Chem. Lett. 7\, 1381 (2016)\n\n//ind
 ico.ictp.it/event/8109/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8109/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Many-body Localizati
 on Through the Lens of Ultracold Quantum Gases
DTSTART;VALUE=DATE-TIME:20170606T090000Z
DTEND;VALUE=DATE-TIME:20170606T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8224@ictp.it
DESCRIPTION:\n	A fundamental assumption of quantum statistical mechanics i
 s that closed isolated systems always thermalize under their own dynamics.
  Progress on the topic of many-body localization (MBL) has challenged this
  vital assumption\, describing a phase where thermalization\, and with it\
 , equilibrium thermodynamics\, breaks down.\n	In this talk\, I will descri
 be how we can realize such a phase of matter with ultracold fermions in bo
 th driven and undriven optical lattices\, with a focus on the relevance of
  realistic experimental platforms. Furthermore\, I will describe new resul
 ts on the observation of a regime exhibiting extremely slow scrambling\, e
 ven for "infinite-temperature states" in one and two dimensions. Our resul
 ts demonstrate how controlled quantum simulators can explore fundamental q
 uestions about quantum statistical mechanics in genuinely novel regimes\, 
 often not accessible to state-of-the-art classical computations.\n\n//indi
 co.ictp.it/event/8224/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8224/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: New Strategies Towar
 ds Proving the Riemann Hypothesis
DTSTART;VALUE=DATE-TIME:20170620T090000Z
DTEND;VALUE=DATE-TIME:20170620T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8270@ictp.it
DESCRIPTION:\n	I will review two new strategies towards resolving the Riem
 ann Hypothesis. One is based on an exact equation satisfied by individual 
 zeros\, whose solution is well approximated by the Lambert W function. The
  second uses an analogy with random walks to argue that the Euler product 
 formula is valid to the right of the critical line. We use these ideas to 
 calculate the google-th zero.\n\n//indico.ictp.it/event/8270/
LOCATION:SISSA\, Via Bonomea\, Room 128
URL://indico.ictp.it/event/8270/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: Quantum Oscillations of Magnetization in
  Kondo Insulators
DTSTART;VALUE=DATE-TIME:20170622T093000Z
DTEND;VALUE=DATE-TIME:20170622T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8264@ictp.it
DESCRIPTION:\n	Motivated by recent observations of quantum oscillations of
  magnetization in a Kondo insulator (SmB_6)\, we investigate the Kondo lat
 tice model of spin-1/2 local moments coupled to the conduction electrons a
 t half-filling for its orbital response to magnetic field. The key finding
  of our study is that the quantum oscillations of magnetization in Kondo i
 nsulators occur as a bulk phenomenon\, which manifests itself through the 
 inversion of a Hofstadter - quantized dispersion of the gaped charge quasi
 -particles whose chemical-potential surface these oscillations measure . W
 e find this through a minimal effective dynamics\, in a certain canonical 
 representation of electrons \, that appropriately describes the Kondo insu
 lating state\, and reveals important new features such as the inversion an
 d Lifshitz-like transition for the charge quasi-particles. We also predict
 s these oscillations to occur in the spin-density wave insulators .\n\n//i
 ndico.ictp.it/event/8264/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8264/
END:VEVENT
BEGIN:VEVENT
SUMMARY:SPECIAL Condensed Matter Seminar: Variations on a Theme of Aharono
 v and Bohm
DTSTART;VALUE=DATE-TIME:20170627T090000Z
DTEND;VALUE=DATE-TIME:20170627T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8247@ictp.it
DESCRIPTION:\n	KINDLY NOTE VENUE:  ICTP Budinich Lecture Room\, entrance 
 Leonardo Building.\n	Abstract:\n	The Aharonov-Bohm effect (AB) concerns th
 e role in quantum physics of the magnetic vector potential of an impenetra
 ble line of magnetic flux. Its partial anticipation by Ehrenberg and Siday
 \, in terms of interference\, was an approximation whose wavefunction was 
 not singlevalued. Its connection with the singlevalued AB wave involves to
 pology: ‘whirling waves’ winding round the flux. AB is a fine illustra
 tion of idealization in physics. There are four AB effects\, depending on 
 whether the waves and the flux are classical or quantum. In the classical-
 classical case\, many details of the AB wavefunction have been explored ex
 perimentally in ripples scattered by a water vortex\, where the flow veloc
 ity of the water corresponds to the vector potential\; this analogy has re
 cently been extended to include superradiance. The AB wave possesses a pha
 se singularity\, and there is a similar phenomenon in general interferomet
 ers. Connections between the AB wave and the Cornu spiral describing edge 
 diffraction lead to very accurate approximations.\n\n//indico.ictp.it/even
 t/8247/
LOCATION:ICTP Leonardo Building - Budinich Lecture Hall
URL://indico.ictp.it/event/8247/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Special Series of Lectures on Quantum Many-body Systems Using
  Tensor Networks: An Introduction. (1) Entanglement and Tensor-Network Ans
 atz
DTSTART;VALUE=DATE-TIME:20170703T120000Z
DTEND;VALUE=DATE-TIME:20170703T131500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8251@ictp.it
DESCRIPTION://indico.ictp.it/event/8251/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8251/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Special Series of Lectures on Quantum Many-body Systems Using
  Tensor Networks: An Introduction. (2) Variational Approaches in Low-dimen
 sional Tensor Networks
DTSTART;VALUE=DATE-TIME:20170703T131500Z
DTEND;VALUE=DATE-TIME:20170703T143000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8252@ictp.it
DESCRIPTION://indico.ictp.it/event/8252/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8252/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: Structure and Mechanical Properties of P
 ristine and Oxidized Graphene Films: Computations and Experiments
DTSTART;VALUE=DATE-TIME:20170703T090000Z
DTEND;VALUE=DATE-TIME:20170703T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8272@ictp.it
DESCRIPTION:\n	Graphene and chemically functionalized graphene are two-dim
 ensional materials exhibiting fascinating properties. Technological applic
 ations of these materials can emerge only from understanding and controlli
 ng structure and properties at the layer/atomic level. In this talk\, I wi
 ll report on our recent atomistic studies of the chemical structure and me
 chanical properties of both pristine and oxidized multilayer graphene film
 s on SiC. I will first focus on graphene oxide and present results of a de
 nsity functional theory study undertaken to interpret puzzling X-ray photo
 electron spectroscopy and X-ray diffraction measurements. Secondly\, I wil
 l report on atomic force microscope (AFM) indentation measurements of the 
 perpendicular-to-the-plane elasticity of graphene-based films\, and after 
 presenting selected experimental results\, I will focus on the computation
 s carried out to elucidate the elastic behaviors of both the pristine and 
 oxidized graphene films. Key topics discussed in this talk include (i) the
  chemical structure and mechanisms underlying the metastable character of 
 epitaxial graphene oxide [1\,2]\, (ii) the role played by moisture to infl
 uence the elastic modulus and structure of the graphene oxide films [3\,4]
 \, and (iii) the unusual mechanical response exhibited by a bilayer graphe
 ne film on SiC when indented by an AFM tip [4].\n	[1] S. Kim\, S. Zhou\, Y
 . Hu\, M. Acik\, Y.J. Chabal\, C. Berger\, W. de Heer\, A. Bongiorno\, and
  E. Riedo\, Room-temperature metastability of multilayer graphene oxide fi
 lms\, Nature Materials 11\, 544 (2012).\n	[2] S. Zhou and A. Bongiorno\, D
 ensity Functional Theory Modeling of Multilayer “Epitaxial” Graphene O
 xide\, Accounts of Chemical Research 47\, 3331 (2014).\n	[3] S. Zhou\, S. 
 Kim\, E. Di Gennaro\, Y. Hu\, C. Gong\, C.-Y. Chang\, X. Lu\, H.-C. Chiu\,
  C. Berger\, W. de Heer\, E. Riedo\, Y.J. Chabal\, C. Aruta\, and A. Bongi
 orno\, Film structure of epitaxial graphene oxide on SiC: Insight on the r
 elationship between interlayer spacing\, water content\, and intralayer st
 ructure\, Advanced Materials Interfaces 1\, 1300106 (2014).\n	[4] Y. Gao\,
  S. Kim\, S. Zhou\, H.-C. Chiu\, D. Nélias\, C. Berger\, W. de Heer\, R. 
 Sordan\, L. Polloni\, A. Bongiorno\, and E. Riedo\, Elastic coupling betwe
 en layers in two-dimensional materials\, NaturMaterials 14\, 714 (2015).\n
 \n//indico.ictp.it/event/8272/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8272/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Special Series of Lectures on Quantum Many-body Systems Using
  Tensor Networks: An Introduction. (3) Time Evolution of States and Operat
 ors
DTSTART;VALUE=DATE-TIME:20170704T120000Z
DTEND;VALUE=DATE-TIME:20170704T131500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8253@ictp.it
DESCRIPTION://indico.ictp.it/event/8253/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8253/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Special Series of Lectures on Quantum Many-body Systems Using
  Tensor Networks: An Introduction. (4) Integrability and Exact MPS Solutio
 ns
DTSTART;VALUE=DATE-TIME:20170704T131500Z
DTEND;VALUE=DATE-TIME:20170704T143000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8254@ictp.it
DESCRIPTION://indico.ictp.it/event/8254/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8254/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Quantum Master Equat
 ions and Integrability
DTSTART;VALUE=DATE-TIME:20170704T090000Z
DTEND;VALUE=DATE-TIME:20170704T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8276@ictp.it
DESCRIPTION://indico.ictp.it/event/8276/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8276/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: Aromatic Hydrocarbon Route to High Tc Su
 perconductivity
DTSTART;VALUE=DATE-TIME:20170706T093000Z
DTEND;VALUE=DATE-TIME:20170706T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8263@ictp.it
DESCRIPTION:\n	Field of superconductivity continues to surprise and challe
 nge us with unanticipated new systems. A recent finding of Meissner signal
  at 120 K in K doped para terphenyl (three benzene rings bridged by two C-
 C bonds) raises several interesting questions. We will summarize supercond
 uctivity in alkali doped C60\, aromatic hydrocarbons and new potential hig
 h Tc para terpheny. Focus will be on mechanism of superconductivity and li
 mits on Tc\, by making use of what we know about key quantum chemistry of 
 aromatic hydrocarbons. Two extreme cases and possible interplay will be di
 scussed [1]. Superconductivity arising from RVB physics in i) correlated m
 etallic band made of LUMO orbitals of hydrocarbons\, in the background of 
 an insulating K ion subsystem and ii) correlated metallic band of an expan
 ded alkali metal subsystem\, in the background of an insulating hydrocarbo
 n scaffold. [1] G. Baskaran\, arXiv:1702.08153\n\n//indico.ictp.it/event/8
 263/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8263/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: "Dynamics of the Haldane Model Following
  a Quench: Non-analyticities and Emergent Topology"
DTSTART;VALUE=DATE-TIME:20170707T120000Z
DTEND;VALUE=DATE-TIME:20170707T133000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8262@ictp.it
DESCRIPTION:\n	Thermalization of a closed quantum system is a problem of i
 mmense interest. In this talk\, we shall\, however\, focus on the early ti
 me dynamics of a closed quantum system evolving with the time independent 
 final Hamiltonian following a quench. The purpose is to probe the emerging
  non-analyticities at different instants of time referred to as so called 
 "dynamical quantum phase transitions (DQPTs)". These non-analyticties are 
 manifested in the Loschmidt echo and can be connected to the the lines (or
  areas) of "Fisher zeros" in the complex time plane. Furthermore\, these a
 re reflected in a dynamical topological order parameter constructed out of
  the gauge-independent Pancharatnam phase implying an emerging topological
  structure. With a brief note on the one-dimensional models\, we shall ill
 ustrate the above scenario using the topological Haldane model on a hexago
 nal lattice. We shall illustrate the non-trivial role played by the Haldan
 e mass term (which determines the topology of the equilibrium Haldane mode
 l) and also propose the topological index associated with the correspondin
 g DQPTs.\n\n//indico.ictp.it/event/8262/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8262/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Creating Cool Quantu
 m Matter by Non-Linear Driving
DTSTART;VALUE=DATE-TIME:20170718T090000Z
DTEND;VALUE=DATE-TIME:20170718T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8280@ictp.it
DESCRIPTION:\n	Generically\, driving a many-body system simply heats up th
 e system. However\, by using smart driving protocols one can achieve more 
 interesting steady states of quantum matter\, for example states with extr
 emely low effective temperatures. This is what happens in the so-called th
 ermal mixing method\, which is used to cool nuclear spins (in preparation 
 for NMR).\n	The technique consists in driving non-linearly a system of dis
 ordered electronic spins\, which drives it to an ultra-cold steady state\,
  whose temperature is transmitted to the nuclei. Interestingly the cooling
  effect is optimized by working in the vicinity of an electron's many-body
  localization crossover.\n	I will explain the physical principles at work 
 and discuss how similar mechanisms could be used in the context of cold at
 oms or specific ferro-magnets.\n\n//indico.ictp.it/event/8280/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8280/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: Superconductivity vs Bond State Formatio
 n in a Two Band Superconductor
DTSTART;VALUE=DATE-TIME:20170727T093000Z
DTEND;VALUE=DATE-TIME:20170727T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8286@ictp.it
DESCRIPTION:\n	We discuss the interplay between superconductivity and form
 ation of bound pairs of fermions (BCS-BEC crossover) in a 2D model of inte
 racting fermions with small Fermi energy ϵF and a weak attractive inter
 action\, which extends to energies well above ϵ_F. The 2D case is speci
 al because a two-particle bound state forms at arbitrary weak interaction\
 , and already at weak coupling\, one has to distinguish between the bound-
 state formation and superconductivity. We briefly review the situation in 
 the one-band model and then consider two different two-band models: one wi
 th one hole band and one electron band and another with two hole or two el
 ectron bands. At ϵ_F≫E_0\, where E_0 is the energy of the bound s
 tate of two particle in vacuum\, the two models behave similar. But in the
  opposite case they behave differently: in the model with two hole/two ele
 ctron bands\, the instability temperature of formation of cooper pairs T_i
 ns∼E_0/(logE_0/ϵ_F )\, and the true superconducting critical tempe
 rature T_c∼ϵ_F\, like in the one-band model. In between T_ins and 
 T_c\, the system displays a preformed pair behavior. In the model with one
  hole and one electron bands\, T_c remains of order T_ins\, and both remai
 n finite at ϵ_F=0 and of the order of E_0. The preformed pair behavior 
 still does exist in this model because T_c is numerically smaller than T_i
 ns.\n\n//indico.ictp.it/event/8286/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8286/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: 'Interplay of Dissipation and Interactio
 ns: Particle Transport and Light-cone Propagation of Correlations'
DTSTART;VALUE=DATE-TIME:20170802T130000Z
DTEND;VALUE=DATE-TIME:20170802T140000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8290@ictp.it
DESCRIPTION://indico.ictp.it/event/8290/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8290/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Microscopic model of quantum butterfly effect: out-of-time-order c
 orrelators and traveling combustion waves
DTSTART;VALUE=DATE-TIME:20170809T120000Z
DTEND;VALUE=DATE-TIME:20170809T130000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8357@ictp.it
DESCRIPTION://indico.ictp.it/event/8357/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8357/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: C
 oherent Nonlinear Co-transport of Light and Atoms
DTSTART;VALUE=DATE-TIME:20170907T093000Z
DTEND;VALUE=DATE-TIME:20170907T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8281@ictp.it
DESCRIPTION:\n	Attempts to use hollow optical fibres to guide BECs have be
 en experimentally inconclusive. One explanation of these experimental diff
 iculties will be provided.\n	It will then be shown that there are paramete
 r regions where atoms and light in a hollow photonic crystal wave guide co
 mbine to form solitary waves\, allowing stable transport.\n\n//indico.ictp
 .it/event/8281/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8281/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Broadcasted Lectures on Frontiers of CMP (FCMP) Lecture 2: Th
 e most dilute superconductor
DTSTART;VALUE=DATE-TIME:20170908T133000Z
DTEND;VALUE=DATE-TIME:20170908T144500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8371@ictp.it
DESCRIPTION://indico.ictp.it/event/8371/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8371/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Broadcasted Lectures on Frontiers of CMP (FCMP) Lecture 1: Dy
 namic/transient superconducting responses and the plot of Tc versus superf
 luid
DTSTART;VALUE=DATE-TIME:20170908T121000Z
DTEND;VALUE=DATE-TIME:20170908T132500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8372@ictp.it
DESCRIPTION://indico.ictp.it/event/8372/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8372/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Broadcasted Lectures on Frontiers of CMP (FCMP): Can you buil
 d Superconductors with Molecular Bricks?
DTSTART;VALUE=DATE-TIME:20170915T121000Z
DTEND;VALUE=DATE-TIME:20170915T132500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8380@ictp.it
DESCRIPTION:\n	Abstract:\n	Most superconductors are made using standard te
 chniques involving inorganic components and modifications are made accordi
 ng to a standard set of simple chemical replacements. However\, organic ch
 emistry is potentially much more flexible and the addition of molecules in
 to superconductors offers a new route to controlling properties. This has 
 led to the field of organic superconductors and I will outline some of the
  results that have been achieved in this field [1-3]. I will also describe
  some new superconductors which have been made using a low- temperature in
 tercalation method that is capable of inserting molecular species in betwe
 en superconducting FeSe layers. It results in a large increase in supercon
 ducting transition temperature - more than a factor of 4 [4\,5]. In this t
 alk\, I will review recent progress and describe new results on Lix[(NH2)y
 (NH3)1−y]zFe2Se2 (z = 1\, 2) which have been carried out in order to stu
 dy the effect on the superconducting properties of intercalating additiona
 l ammonia\, via reversible adsorption and desorption. The reactions were c
 arried out in situ on the muon beamline so that the superfluid stiffness c
 ould be measured using transverse-field muon-spin rotation experiment on a
  single sample\, first having undergone exposure to 1 bar of ammonia at 25
 0 K\, and then again following desorption. These results illustrate some o
 f the possibilities\, but also the difficulties\, of using molecules in de
 veloping new superconductors.\n	(Work performed in collaboration with S. J
 . Clarke and coworkers at Oxford\, RAL and Durham\, UK.)\n	[1] T. Ishiguro
 \, K. Yamaji\, G. Saito\, Organic Superconductors\, second ed.\, Springer-
 Verlag\, Berlin\, (1998)\n	[2] F. L. Pratt and S. J. Blundell\, Phys. Rev.
  Lett. 94\, 097006 (2005)\n	[3] J. G. Analytis\, A. Ardavan\, S. J. Blunde
 ll\, R. L. Owen\, E. F. Garman\, C. Jeynes and B. J. Powell\, Phys. Rev. L
 ett. 96\, 177002 (2006)\n	[4] M. Burrard-Lucas\, D. G. Free\, S. J. Sedlma
 ier\, J. D. Wright\, S. J.Cassidy\, Y. Hara\, A. J. Corkett\, T. Lancaster
 \, P. J. Baker\, S. J. Blundell\, and S. J. Clarke\, Nat. Mater. 12\, 15 (
 2013)\n	[5] H. Sun\, D. N. Woodruff\, S. J. Cassidy\, G. M. Allcroft\, S. 
 J. Sedlmaier\, A. L. Thompson\, P. A. Bingham\, S. D. Forder\, S. Cartenet
 \, N. Mary\, S. Ramos\, F. R. Foronda\, B. H. Williams\, X. Li\, S. J. Blu
 ndell\, and S. J. Clarke\, Inorg. Chem. 54\, 1958 (2015)\n\n//indico.ictp.
 it/event/8380/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8380/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Broadcasted Lectures on Frontiers of CMP (FCMP): New Quantum 
 Spin States in Model Frustrated Lattices
DTSTART;VALUE=DATE-TIME:20170915T133000Z
DTEND;VALUE=DATE-TIME:20170915T144500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8381@ictp.it
DESCRIPTION:Abstract:\n	Finding new states of matter is one main goal of r
 esearch in condensed matter which often gives rise to novel concepts and s
 ometimes to remarkable technological innovations. In the field of magnetis
 m\, the frustration of the magnetic interactions in well-chosen lattice ge
 ometries is the key ingredient to promote truly original ground states. Th
 is field of research has grown tremendously during the last 15 years with 
 the emergence of new concepts such as the spin ices or the spin liquids an
 d the corresponding original excitations\, magnetic monopoles and spinons.
  Spin liquids for instance can be viewed as resonant singlets (antiferroma
 gnetic spin pairs)\, a model quantum ground state first advocated for the 
 interpretation of high Tc superconductivity [1].\n	After a long and basic 
 introduction of this field of research and the challenges it has opened\, 
 I’ll focus on the emblematic case of the kagome geometry. Indeed the low
  connectivity of the kagome network together with the quantum fluctuations
  enhanced for low spin 1⁄2 destabilize any ordered state in favor of a f
 luctuating ground state at T=0\, coined a spin liquid. The recent discover
 y of model compounds for this physics\, namely with a true kagome lattice 
 decorated by quantum S=1/2 spins (Cu2+ or V4+)\, has boosted both the theo
 retical and the experimental research in this field. The spin liquid state
  is for instance realized in the archetypal ZnCu3(OH)6Cl2 “herbertsmithi
 te” compound. The latter shows no sign of frozen on-site magnetism\, ie 
 no spontaneous breaking of symmetry\, down to mK temperatures while the ma
 gnetic interaction is of the order of hundreds of Kelvin [2\,3]! The preci
 se nature of the ground state and of its elementary excitations\, the phas
 e transitions that can be induced by various parameters are at the heart o
 f the current debates and a seed for new concepts in the field of frustrat
 ed magnetism. I will review the major and recent advances in the field and
  will underline the power of two local techniques\, NMR and μSR to study 
 such a field of research [4].\n	References\n	[1] P. W. Anderson\, Science 
 235\, 1196 (1987)\n	[2] P. Mendels et al.\, Phys. Rev. Lett. 98\, 0772014 
 (2007)\; J. S. Helton et al. \, Phys. Rev. Lett. 98 \, 07204 (2007).\n	[3]
  P.A. Lee\, Science\, Perspectives 321\, 1306 (2008).\n	[4] For a review\,
  see P. Mendels and F. Bert\, Special Topics Section on "Novel States of M
 atter Induced by Frustration"\, J. Phys. Soc. Jpn 1\, 011001 (2010)\; J. P
 hys. Conf. Series 320 \, 012004 (2011). M.R. Norman\, Rev. Mod. Phys. 88\,
  041002 (2016). P. Mendels and F. Bert\, Comptes Rendus Physique\, 17\, 45
 5 (2016).\n\n//indico.ictp.it/event/8381/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8381/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Special Series of Lectures on Nanomechanics meets Spintronics
  - Part I: Mechanically Controlled Electronic Spin in Electric Weak Links
DTSTART;VALUE=DATE-TIME:20170919T120000Z
DTEND;VALUE=DATE-TIME:20170919T130000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8267@ictp.it
DESCRIPTION:\n	Inefficient screening of electric fields in nanoconductors 
 makes electric manipulation of electronic transport in nanodevices possibl
 e. Accordingly\, electrostatic (charge) gating is routinely used to affect
  and control the Coulomb electrostatics and quantum interference in modern
  nanodevices. Besides their charge\, another (quantum mechanical) property
  of electrons — their spin — is at the heart of modern spintronics\, a
  term implying that a number of magnetic and electrical properties of smal
 l systems are simultaneously harvested for device applications. In this pr
 esentation the possibility to achieve “spin gating” of mesoscopic devi
 ces [1]\, i.e. the possibility of an external spin control of the electron
 ic properties of nanodevices is discussed. Rather than the Coulomb interac
 tion\, which is responsible for electric charge gating\, we consider spin 
 gating resulting from the Rashba type of electronic spin-orbit coupling. W
 e show that electric weak links in the form of a nanowire that can be bent
  gives rise to a possibility for a mechanical control of the spin gating e
 ffect\, since bending the nanowire affects the trajectory of the electron 
 and therefore the spin-orbit interaction. Mechanically and microwave activ
 ated spin currents and superconducting currents in non-superconducting [2]
  and superconducting [3] devices will be discussed as examples of such a s
 pin-mechanical manipulation.\n	1. R. I. Shekhter and M. Jonson\, Spin gati
 ng of mesoscopic devices\, Synth. Met. 216\, 2-10 (2016).\n	2. R. I. Shekh
 ter\, O. Entin-Wohlman and A. Aharony\, Suspended nanowire as a mechanical
 ly controlled Rashba spin splitter\, Phys. Rev. Lett. 111\, 176602 (2013).
 \n	3. R.I. Shekhter\, O. Entin-Wohlman\, M. Jonson\, and A. Aharony\, Rash
 ba splitting of Cooper Pairs\, Phys. Rev. Lett\, 116\, 217001 (2016).\n\n/
 /indico.ictp.it/event/8267/
LOCATION:ICTP Leonardo Building - Euler Lecture Hall
URL://indico.ictp.it/event/8267/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Special Series of Lectures on Nanomechanics meets Spintronics
  - Part II: Spin Blockade Based Mesoscopic Heat Engine
DTSTART;VALUE=DATE-TIME:20170919T131500Z
DTEND;VALUE=DATE-TIME:20170919T141500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8268@ictp.it
DESCRIPTION:\n	I will consider a mesoscopic nanomechanical weak link where
  electronic transport between leads is blocked by a spin blockade. Namely\
 , a suspended nanowire which is coupled to two oppositely polarized half-m
 etals and subjected to a nonuniform magnetic field. It will be shown that 
 in such system a temperature drop between the leads can significantly affe
 ct the dynamics of a mechanical degree of freedom. In particular\, it is d
 emonstrated that\, under certain conditions\, the stationary distribution 
 of the mechanical subsystem has a Boltzmann form with an effective tempera
 ture\, which is lower than the temperature of the “cold” lead\; this s
 eems rather counterintuitive. We also find that a change in the direction 
 of the temperature gradient can result in the generation of mechanical vib
 rations rather than the heating of the mechanical subsystem. Therefore\, t
 he system resembles a nanoelectromechanical heat engine. We derive a crite
 rion for the mechanical instability and estimate the amplitude of the resu
 lting self-sustained oscillations.\n	1. J Atalaya\, LY Gorelik\, Spintroni
 cs-based mesoscopic heat engine Physical Review B 85 \, 245309\, (2012)\; 
 P Stadler\, W Belzig and G Rastelli\, Ground state cooling of a carbon nan
 o-mechanical resonator by spin-polarized current. Phys. Rev. Lett. 113\, 0
 47201 (2014)\n	2. A. Vikström\, A. M. Eriksson\, S. I. Kulinich\, and
  L. Y. Gorelik\, Nanoelectromechanical heat engine based on electron-ele
 ctron interaction\, Phys. Rev. Lett. 117\, 247701\, 2016\n\n//indico.ictp.
 it/event/8268/
LOCATION:ICTP Leonardo Building - Euler Lecture Hall
URL://indico.ictp.it/event/8268/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Broadcasted Lectures on Frontiers of CMP (FCMP): The Color of
  Doped SrTiO3\, Mobile Polarons and Superconductivity
DTSTART;VALUE=DATE-TIME:20170922T121000Z
DTEND;VALUE=DATE-TIME:20170922T132500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8394@ictp.it
DESCRIPTION://indico.ictp.it/event/8394/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8394/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Broadcasted Lectures on Frontiers of CMP (FCMP): Superconduct
 ivity in Oxide Heterostructures
DTSTART;VALUE=DATE-TIME:20170922T133500Z
DTEND;VALUE=DATE-TIME:20170922T145000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8395@ictp.it
DESCRIPTION://indico.ictp.it/event/8395/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8395/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Functional Perturbat
 ive RG and CFT Data in the E-Expansion
DTSTART;VALUE=DATE-TIME:20170926T090000Z
DTEND;VALUE=DATE-TIME:20170926T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8397@ictp.it
DESCRIPTION:\n	I will show how the use of standard perturbative RG in dime
 nsional regularization allows for a renormalization group based computatio
 n of both the spectrum and a family of coefficients of the operator produc
 t expansion (OPE) for the whole family of scalar multi-critical universali
 ty classes.\n	The task is greatly simplified by a straightforward generali
 zation of perturbation theory to a functional perturbative RG approach. I 
 illustrate the procedure in the e-expansion by obtaining the next-to-leadi
 ng corrections for the spectrum and the leading corrections for the OPE co
 efficients of Ising and Lee-Yang universality classes and then give severa
 l results for the whole family of renormalizable multi-critical models.\n	
 Whenever comparison is possible our RG results explicitly match the ones r
 ecently derived using combination of CFT constraints\, Schwinger-Dyson equ
 ation and the free theory behavior at the upper critical dimension.\n\n//i
 ndico.ictp.it/event/8397/
LOCATION:SISSA\, Via Bonomea 265\,  Meeting Room 7th floor
URL://indico.ictp.it/event/8397/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: M
 icrowave Properties of Superconductors close to SIT
DTSTART;VALUE=DATE-TIME:20170928T093000Z
DTEND;VALUE=DATE-TIME:20170928T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8366@ictp.it
DESCRIPTION:\n	Strongly disordered pseudogapped superconductors are expect
 ed to display arbitrary high values of kinetic inductance close to superco
 nductor-insulator transition (SIT) that makes them attractive for the impl
 ementation of dissipationless superinductance. We develop the theory of th
 e collective modes in these superconductors and discuss associated dissipa
 tion at microwave frequencies. We obtain the collective mode spectra depen
 dence on the disorder level and conclude that collective modes become rele
 vant source of dissipation and noise in the far vicinity of SIT.\n\n//indi
 co.ictp.it/event/8366/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8366/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Exploring SO(3) 'Nuc
 lear Physics' with Ultra-cold Gases
DTSTART;VALUE=DATE-TIME:20171004T090000Z
DTEND;VALUE=DATE-TIME:20171004T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8399@ictp.it
DESCRIPTION:\n	An ab initio calculation of nuclear physics from Quantum Ch
 romo-dynamics (QCD)\, the fundamental SU(3) gauge theory of the strong int
 eraction\, remains an outstanding challenge.\n	We will discuss the emergen
 ce of key elements of nuclear physics using an SO(3) lattice gauge theory 
 as a toy model for QCD. We will show that this model is accessible to stat
 e-of-the-art quantum simulation experiments with ultra-cold atoms in an op
 tical lattice. First\, we will demonstrate that our model shares character
 istic many-body features with QCD\, such as the spontaneous breakdown of c
 hiral symmetry\, its restoration at finite baryon density\, as well as the
  existence of few-body bound states. Then\, we will show that\, in the one
 -dimensional case\, the dynamics in the gauge-invariant sector can be enco
 ded as a spin-3/2 Heisenberg model\, i.e.\, as quantum magnetism\, which h
 as a natural realization with bosonic mixtures in optical lattices\, and t
 hus sheds light on the connection between non-Abelian gauge theories and q
 uantum magnetism.\n	with: M. Dalmonte\, P. Zoller\, D. Banerjee\, M. Boegl
 i\, P. Stebler\, U.-J. Wiese\n\n//indico.ictp.it/event/8399/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8399/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Self-propelled Collo
 idal Particles in Viscoelastic Fluids
DTSTART;VALUE=DATE-TIME:20171011T090000Z
DTEND;VALUE=DATE-TIME:20171011T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8400@ictp.it
DESCRIPTION:\n	The motion of many natural microswimmers\, e.g. bacteria an
 d spermatozoa\, commonly takes place in viscoelastic fluids and under conf
 inement close to solid walls. The understanding of their swimming mechanis
 ms has triggered a lot of experimental and theoretical work in recent year
 s as well as the development of self-propelled colloidal particles. Althou
 gh the motion of such synthetic microswimmers in Newtonian fluids has been
  extensively studied\, and they are nowadays a paradigm in non-equilibrium
  soft matter [1]\, so far only few investigations have focused on the swim
 ming of microorganisms in viscoelastic fluids [2]. In our work\, we experi
 mentally investigate the dynamics of spherical colloidal microswimmers in 
 viscoelastic fluids\, which are self-propelled by local demixing of a crit
 ical binary polymer mixture induced by laser illumination. Unlike the moti
 on in Newtonian liquids\, we observe a pronounced enhancement of rotationa
 l diffusion with increasing particle velocity [3]\, thereby revealing an u
 nexpected breakdown of the Stokes-Einstein relation for the particle orien
 tation. We demonstrate that this non-equilibrium effect originates from th
 e coupling between the directed particle motion\, and the slow microstruct
 ural relaxation of the surrounding fluid [4]. Furthermore\, we show that s
 uch a coupling gives rise to a wealth of new non-equilibrium phenomena wit
 h no counterpart in Newtonian liquids\, e.g. for the particle translationa
 l and rotational dynamics close to solid walls\, as well as for collective
  motion in crowded environments.\n	References:\n	[1] C. Bechinger\, R. Di 
 Leonardo\, H. Lowen\, C. Reichhardt\, G. Volpe\, and G. Volpe\, Rev. Mod. 
 Phys. 88\, 045006 (2016).\n	[2] A. Patteson\, A. Gopinath\, and P. E. Arra
 tia\, Curr. Opin. Colloid Interface Sci.\, 21\, 86 (2016).\n	[3] J. R. Gom
 ez-Solano\, A. Blokhuis\, and C. Bechinger\, Phys. Rev. Lett. 116\, 138301
  (2016).\n	[4] J. R. Gomez-Solano\, and C. Bechinger\, New J. Physics 17\,
  103032 (2015)\n\n//indico.ictp.it/event/8400/
LOCATION:SISSA\, Via Bonomea 265\, room 05
URL://indico.ictp.it/event/8400/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics "T
 rapping Centers at the Superfluid-Mott-Insulator Criticality: Transition b
 etween Charge-quantized States"
DTSTART;VALUE=DATE-TIME:20171019T093000Z
DTEND;VALUE=DATE-TIME:20171019T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8248@ictp.it
DESCRIPTION:\n	Under the conditions of superfluid-Mott-insulator criticali
 ty in two dimensions\, the trapping centers - i.e.\, local potential wells
  and bumps - are generically characterized by an integer charge correspond
 ing to the number of trapped particles (if positive) or holes (if negative
 ). Varying the strength of the center leads to a transition between two co
 mpeting ground states with charges differing by (plus or minus) one. The h
 allmark of the transition scenario is a splitting of the number density di
 stortion into a half-integer core and a large halo carrying the complement
 ary charge plus/minus 1/2. The sign of the halo charge changes across the 
 transition. The radius of the halo diverges on the approach to the critica
 l strength of the center.\n\n//indico.ictp.it/event/8248/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8248/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: N
 ucleation\, Growth and Polymorphic Transitions in Molecular Materials: Ins
 ights from Molecular Simulations
DTSTART;VALUE=DATE-TIME:20171026T093000Z
DTEND;VALUE=DATE-TIME:20171026T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8398@ictp.it
DESCRIPTION:\n	Nucleation\, growth and polymorphic transitions play a key 
 role in the definition of bulk and surface properties of molecular materia
 ls. These processes are characterised by events unfolding at the molecular
  scale. Understanding the thermodynamics\, kinetics and mechanisms of such
  events is therefore key to rationally develop advanced material synthesis
  processes.\n	Molecular dynamics simulations\, while providing a straightf
 orward description of the relevant length scale\, suffer from timescale an
 d finite-size limitations. In this seminar I will introduce strategies sui
 table to tackle these challenges. Examples drawn from a diverse set of sys
 tems including urea in solution\, carbon dioxide under pressure\, and non-
 covalent supramolecular fibres will be discussed.\n\n//indico.ictp.it/even
 t/8398/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8398/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Special Series of Lectures: An Introduction to Data Analysis 
 Techniques for Dimensional Reduction and Classification - Data Science Par
 t I
DTSTART;VALUE=DATE-TIME:20171106T130000Z
DTEND;VALUE=DATE-TIME:20171106T150000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8409@ictp.it
DESCRIPTION:\n	Topics Covered: \n	 \n\n	- Dimensionality Reduction: Princ
 ipal component analysis\, Local Linear Embedding and ISOMAP\n\n	- Intrinsi
 c Dimensionality of a Data Set\n\n	- Parametric and Non-Parametric Density
  Estimators\n	- Clustering: k-means\, Hierarchical Clustering\, Density-ba
 sed Clustering\n\n//indico.ictp.it/event/8409/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8409/
END:VEVENT
BEGIN:VEVENT
SUMMARY:CMSP Special Series of Lectures: An Introduction to Data Analysis 
 Techniques for Dimensional Reduction and Classification - Data Science Par
 t II 
DTSTART;VALUE=DATE-TIME:20171107T100000Z
DTEND;VALUE=DATE-TIME:20171107T123000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8410@ictp.it
DESCRIPTION:\n	Topics Covered:\n	- Dimensionality Reduction: Principal com
 ponent analysis\, Local Linear Embedding and ISOMAP\n	- Intrinsic Dimensio
 nality of a Data Set\n	- Parametric and Non-Parametric Density Estimators\
 n	- Clustering: k-means\, Hierarchical Clustering\, Density-based Clusteri
 ng\n\n//indico.ictp.it/event/8410/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8410/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Beyond (first-order)
  generalized hydrodynamics: Why? and How!?
DTSTART;VALUE=DATE-TIME:20171107T100000Z
DTEND;VALUE=DATE-TIME:20171107T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8424@ictp.it
DESCRIPTION:\n	I consider nonequilibrium time evolution in the presence of
  inhomogeneities in integrable systems. I remind the audience of the so-ca
 lled generalized hydrodynamic (GHD) description\, and I present some recen
 t results obtained in the massive XXZ spin-1/2 chain.\n	In particular\, I 
 show examples of dynamics with a sub-ballistic (perhaps diffusive) behavio
 r. The ambition to describe such regimes is a strong motivation to go beyo
 nd GHD. Using noninteracting spin chains as a workbench\, I point out some
  of the problems that have to be overcome in order to improve on the curre
 nt theory.\n\n//indico.ictp.it/event/8424/
LOCATION:SISSA Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8424/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: V
 alley Degeneracy Effects in Two-Dimensional Gases
DTSTART;VALUE=DATE-TIME:20171109T103000Z
DTEND;VALUE=DATE-TIME:20171109T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8364@ictp.it
DESCRIPTION:\n	The electronic structure of many devices where the two-dime
 nsional gases are engineered can have degenerate valleys to be occupied by
  charge carriers. This feature for long has been seen as a drawback\, but 
 more recently\, also owing to the discovery of graphene and monolayer grou
 p-VI transition metal dichalcogenides\, it has been recognized as an oppor
 tunity to have an additional degree of freedom to manipulate the electrons
  beside the charge and the spin\, leading to the so-called valleytronics. 
 The valley degeneracy\, that in a minimal description can be seen as an ad
 ditional spin\, has large impact on correlations in these systems and can 
 enrich their phase diagram in general.\n	In this talk I will discuss how t
 his additional degree of freedom affects two different systems. How valley
  polarization changes the magnetic response in AlAs quantum well once we t
 ake into account the mass anisotropy proper to this system and how results
  on spin-susceptibility\, based on Quantum Monte Carlo simulations\, compa
 re with experimental findings. The other aspect that will be addressed is 
 how the phase diagram of a symmetric electron-hole bilayer is modified onc
 e there is in-plane two-fold valley degeneracy. Results for this simple mo
 del can be relevant for the recent proposal to search for indirect exciton
 s condensation in coupled graphene bilayers that\, on a wide density range
 \, have a quadratic energy dispersion.\n\n//indico.ictp.it/event/8364/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8364/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: The Entanglement Ham
 iltonian of a Free-fermion chain
DTSTART;VALUE=DATE-TIME:20171114T100000Z
DTEND;VALUE=DATE-TIME:20171114T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8425@ictp.it
DESCRIPTION:\n	In entanglement studies\, it is convenient to write the red
 uced density matrix of a subsystem in the form exp(-H)\, where H is called
  the entanglement Hamiltonian. This operator has a particular form in real
  space which is related to the way the total system is partitioned.\n	In t
 he talk\, H will be discussed for a large interval in an infinite discrete
  chain of free fermions in its ground state. Very accurate numerical calcu
 lations are presented\, and it is shown how one can obtain H analytically 
 with the help of a commuting operator using asymptotic results found previ
 ously in a different context. Differences to the conformal expressions rem
 ain and are attributed to the discrete nature of the problem. Some related
  topics are mentioned.\n\n//indico.ictp.it/event/8425/
LOCATION:SISSA Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8425/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Seminar: Using a Quantum 
 Work Meter to Test Non Equilibrium Fluctuation Theorems
DTSTART;VALUE=DATE-TIME:20171117T103000Z
DTEND;VALUE=DATE-TIME:20171117T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8404@ictp.it
DESCRIPTION://indico.ictp.it/event/8404/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8404/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Seminar: On Memory Kernel
  Master Equation
DTSTART;VALUE=DATE-TIME:20171120T150000Z
DTEND;VALUE=DATE-TIME:20171120T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8420@ictp.it
DESCRIPTION:\n	I provide sufficient conditions for the memory-kernel gover
 ning nonlocal master equation which guarantee a legitimate (completely pos
 itive and trace-preserving) dynamical map.\n	It turns out that these condi
 tions provide natural parametrizations of the dynamical map being a genera
 lization of the Markovian semigroup. This parametrization is defined by th
 e so-called legitimate pair-monotonic quantum operation and completely pos
 itive map-and it is shown that such a class of maps covers almost all know
 n examples from the Markovian semigroup\, the semi-Markov evolution\, up t
 o collision models and their generalizations.\n\n//indico.ictp.it/event/84
 20/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8420/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics - 
 Water Interfaces: Structure and Vibrational Spectroscopy from ab initio MD
  
DTSTART;VALUE=DATE-TIME:20171123T103000Z
DTEND;VALUE=DATE-TIME:20171123T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8365@ictp.it
DESCRIPTION:\n	Ab initio molecular dynamics (MD) simulations represent a v
 ersatile approach to investigate the structure and dynamics of water inter
 faces\, especially in the cases of heterogeneous systems where less comput
 ationally demanding techniques\, such as force field approaches are not ea
 sily transferable.\n	We present here some recent results on the calculatio
 n of vibrational Sum Frequency Generation spectra\, which employ suitable 
 velocity-velocity correlation functions incorporating the appropriate sele
 ction rules [1\,2].\n	We also present a new approach to investigate vibrat
 ional energy relaxation at water interfaces from the analysis of ab initio
  non-equilibrium MD trajectories. We follow the energy relaxation from a l
 ocally excited vibrational state using suitable descriptors based on vibra
 tional density of states.\n	Our method is tested on different water system
 s\, including bulk water and fluorite/water interfaces at different pH and
  can be used to provide a molecular interpretation of 2D-IR or 2D-SFG spec
 tra. In the case of the water/fluorite interface at low pH we find that wa
 ter behaves similarly to bulk water\, while\, in the case of high pH\, ins
 tead\, the energy relaxation is much slower. A molecular interpretation of
  the different time scales is provided.\n	[1] R Khatib\, EHG Backus\, M Bo
 nn\, MJ Perez-Haro\, MP Gaigeot\, M Sulpizi\, Scientific Reports\, 6 (2016
 )\n	[2] R. Khatib and M Sulpizi\, J. Phys. Chem. Letters\, 8 (6)\, 1310 (2
 017).\n\n//indico.ictp.it/event/8365/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8365/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Single Big Jump and 
 Probability Condensation in Correlated Random Walks: The Case of Lévy Lor
 entz Gas
DTSTART;VALUE=DATE-TIME:20171128T110000Z
DTEND;VALUE=DATE-TIME:20171128T120000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8419@ictp.it
DESCRIPTION:\n	In Lévy flights and Lévy walks\, large deviations play a 
 crucial role in determining the superdiffusive character of the motion. In
 deed\, for identically distributed random variables with fat tails\, the i
 mportance of rare events has been evidenced in the context of Single big j
 ump principle [1] or in physical literature in terms of probability conden
 sation [2]. In Lévy walks far tails of the distribution have been describ
 ed in details in [3] within the theory of infinite densities\, here we wil
 l show that the same results can be obtained considering an approach based
  on the single big jump principle. Lévy flights and walks are typical exa
 mples of uncorrelated renewal processes\, physical systems however are usu
 ally characterized by correlations. In the field of Lévy walks\, a typica
 l example is given by the Lévy Lorentz gas model [4] which describes the 
 motion in a Lévy correlated random environment. Here\, the superdiffusive
  properties are crucially determined by topological correlations [5].\n	I 
 will show that a generalization of the Single big jump principle\, which t
 akes into account of the correlation\, can be applied to the Lévy Lorentz
  gas. Also in this case\, far tails are are analytically described in term
 s of an infinite density.\n	Finally\, I will discuss the application of th
 e single\, long jump to different models: a model for the Sysufus cooling 
 in cold atoms and a model of Lévy walks with memory. These results eviden
 ce that the single long jump principle is a very effective tools which can
  be applied in a wide class of models.\n	[1] S. Foss\, D. Korshunov and S.
  Zachary: "An introduction to heavy tailed and supexponential distribution
 s"\, Springer (2013)\n	[2] S. N. Majumdar\, M. R. Evans and R. K. P. Zia\,
  Phys. Rev. Lett. 94 180601 (2005) [3] A. Rebenshtok\, S. Denisov\, P. Han
 ggi and E. Barkai\, Phys. Rev. Lett. 112\, 110601 (2014)\n	[4] E. Barkai\,
  V. Fleurov\, J. Klafter\, Phys. Rev. E 61\, 1164 (2000) [5] R. Burioni\, 
 L. Caniparoli and A. Vezzani\, Phys. Rev. E 81\, 060101(R) (2010)\n\n//ind
 ico.ictp.it/event/8419/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8419/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Seminar - Stabilizing Mot
 t-Insulator States of Light via Non-Markovian Reservoirs: Toward the Quant
 um Simulation of Zero Temperature Physics in Optical Devices
DTSTART;VALUE=DATE-TIME:20171128T150000Z
DTEND;VALUE=DATE-TIME:20171128T160000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8448@ictp.it
DESCRIPTION://indico.ictp.it/event/8448/
LOCATION:ICTP Leonardo Building - Euler Lecture Hall
URL://indico.ictp.it/event/8448/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Floquet Systems-Ense
 mbles and Order Under Periodic Driving
DTSTART;VALUE=DATE-TIME:20171205T100000Z
DTEND;VALUE=DATE-TIME:20171205T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8430@ictp.it
DESCRIPTION:\n	We study the long-time behaviour of many-body Floquet syste
 ms--many-body quantum systems under temporally periodic driving\, arguably
  the simplest deviation from equilibrium.\n	We begin by showing that gener
 ically such interacting systems heat up\, then focus on two ways to preven
 t this: integrability and disorder. We show that the nontrivial steady sta
 tes thus achieved may host nontrivial phases and focus on the recently obs
 erved example of "time crystals". Finally we close with some remarks on op
 en floquet systems.\n\n//indico.ictp.it/event/8430/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8430/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: S
 caling Behaviour in the Impurity and Periodically Driven Quantum Ising Mod
 el 
DTSTART;VALUE=DATE-TIME:20171207T103000Z
DTEND;VALUE=DATE-TIME:20171207T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8446@ictp.it
DESCRIPTION:\n	The quantum spin-1/2 Ising model exhibits a 2nd-order quant
 um phase transition (QPT) which is characterised by a set of critical inde
 xes that defines the corresponding universality class. Strictly speaking\,
  2nd-order QPTs occur only in the thermodynamical limit\, nevertheless cri
 ticality can be revealed also in finite size systems once the correlation 
 length becomes of the order of the system’s size and finite size scaling
  behaviour (FSS) is retrieved.\n	In this talk the question of the robustne
 ss of FSS in the Ising model driven out-of-equilibrium by a periodic modul
 ation of the transverse magnetic field across its critical point is addres
 sed [1]. Furthermore\, the effects of the Ising QPT on a boundary impurity
  are investigated\, showing that the impurity magnetic observables exhibit
  FSS with critical exponents belonging to the Ising universality class\, a
 lthough an impurity order parameter arises which differs from the bulk ord
 er parameter [2].\n	[1] S. Lorenzo\, J. Marino\, F. Plastina\, G. M. Palma
 \, and T. J. G. Apollaro\, Quantum Critical Scaling under Periodic Driving
 \, Sci. Rep. 7\, 5672 (2017).\n	[2] T. J. G. Apollaro\, G. Francica\, D. G
 iuliano\, G. Falcone\, G. M. Palma\, and F. Plastina\, Universal scaling f
 or the quantum Ising chain with a classical impurity\, Phys. Rev. B 96\, 1
 55145 (2017).\n\n//indico.ictp.it/event/8446/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8446/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminars: Effective Thermodyn
 amics for a Marginal Observer 
DTSTART;VALUE=DATE-TIME:20171212T100000Z
DTEND;VALUE=DATE-TIME:20171212T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8426@ictp.it
DESCRIPTION:\n	Thermodynamics often presumes that the observer has a macro
 scopically complete information about the system she or he deals with: no 
 parasitic current\, exact evaluation of the forces needed to drive the sys
 tem out of equilibrium. However\, most often the observer only measures ma
 rginal information. How is she or he to make consistent thermodynamic clai
 ms? Disregarding sources of dissipation might lead to bold claims\, such a
 s the possibility of perpetuum mobile. We show that it is nevertheless pos
 sible to produce an effective description that does not dispense with the 
 fundamentals of thermodynamics: the 2nd Law\, the Fluctuation-Dissipation 
 paradigm\, and the more recent and encompassing Fluctuation Theorem. We ba
 se our theory on the theory of the stochastic thermodynamics of nonequilib
 rium systems\, introducing a class of "marginally time-reversed" Markovian
  generators that have interesting mathematical and physical properties.\n\
 n//indico.ictp.it/event/8426/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8426/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Entanglement in Prot
 ein Native States
DTSTART;VALUE=DATE-TIME:20171219T100000Z
DTEND;VALUE=DATE-TIME:20171219T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8427@ictp.it
DESCRIPTION:\n	Since a few years it has become clear that it is possible t
 o apply topological methods to characterize the structure of proteins. For
  instance\, knots and “lasso” structures were found in several protein
 s. Here we focus on the linking number quantifying the degree of entanglem
 ent between two loops\, which may be easily generalized to estimate the en
 tanglement between two open curves such as protein backbones. With this sc
 heme we find a high degree of interwinding between proteins forming domain
 -swapped dimers. In the same way\, one may estimate the maximum degree of 
 entanglement within subchains of a single protein backbone to find that it
  strongly anti-correlates with that protein folding rate. This introduces 
 a novel characterization of proteins that complements other methods extrac
 ting information from their tertiary structure.\n\n//indico.ictp.it/event/
 8427/
LOCATION:SISSA\, Via Bonomea room 128
URL://indico.ictp.it/event/8427/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar - Topological Order a
 nd Tensor Networks: A Local Perspective on Global Entanglement
DTSTART;VALUE=DATE-TIME:20180109T100000Z
DTEND;VALUE=DATE-TIME:20180109T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8421@ictp.it
DESCRIPTION:\n	Strongly correlated quantum systems exhibit a wide range of
  phases with unconventional behavior. These phases are characterized by no
 n-trivial global entanglement patterns and cannot be described within the 
 Landau paradigm due to their lack of local order parameters. In my talk\, 
 I will discuss how quantum information theory allows us to describe such s
 ystems in a way which reconciles their global entanglement with a local de
 scription\, based on the framework of tensor networks. I will show how ten
 sor networks allow to capture both the structure of the physical interacti
 ons as well as global topological entanglement within a unified local desc
 ription\, and how this allows us to build a comprehensive framework to stu
 dy topologically ordered systems and their excitations. I will then discus
 s applications of this framework: First\, I will show how it allows to cha
 racterize the precise nature of topological spin liquids\; and second\, I 
 will discuss how it can be used to explain topological phase transitions d
 riven by anyon condensation through phases in their entanglement\, allowin
 g us to devise measurable order parameters for anyon condensation and thus
  to study topological phase transitions at a microscopic level.\n\n//indic
 o.ictp.it/event/8421/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8421/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Quantum Many-body Sc
 ars and Non-ergodic Dynamics in the Fibonacci Chain
DTSTART;VALUE=DATE-TIME:20180116T100000Z
DTEND;VALUE=DATE-TIME:20180116T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8422@ictp.it
DESCRIPTION:\n	Recent experiments on large chains of Rydberg atoms [H. Ber
 nien et al.\, arXiv:1707.04344] have demonstrated the possibility of reali
 zing 1D systems with locally constrained Hilbert spaces\, along with some 
 surprising signatures of non-ergodic dynamics\, such as persistent oscilla
 tions following a quench from the Neel product state. I will argue that th
 is phenomenon is a manifestation of a "quantum many-body scar"\, i.e.\, a 
 concentration of extensively many eigenstates of the system around special
  many-body states. The special states are analogs of unstable classical pe
 riodic orbits in the single-particle quantum scars. I will present a model
  based on a single particle hopping on the Hilbert space graph\, which qua
 ntitatively captures the scarred wave functions up to large systems of 32 
 atoms. These results suggest that scarred many-body bands give rise to a n
 ew universality class of quantum dynamics\, which opens up opportunities f
 or creating and manipulating novel states with long-lived coherence in sys
 tems that are now amenable to experimental study.\n\n//indico.ictp.it/even
 t/8422/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8422/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Haldane" Phases with Ultracold Fermionic Atoms in Double-Well Optical Latt
 ices
DTSTART;VALUE=DATE-TIME:20180118T090000Z
DTEND;VALUE=DATE-TIME:20180118T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8445@ictp.it
DESCRIPTION:\n	We propose to realize one-dimensional topological phases pr
 otected by SU(N) symmetry using alkali or alkaline-earth atoms loaded into
  a bichromatic optical lattice. We derive a realistic model for this syste
 m and investigate it theoretically. Depending on the parity of N\, two dif
 ferent classes of symmetry-protected topological (SPT) phases are stabiliz
 ed at half-filling for physical parameters of the model. For even N\, the 
 celebrated spin-1 Haldane phase and its generalization to SU(N) are obtain
 ed with no local symmetry breaking. In stark contrast\, at least for N=3\,
  a new class of SPT phases\, dubbed chiral Haldane phases\, that spontaneo
 usly break inversion symmetry\, emerge with a two-fold ground-state degene
 racy. The latter ground states with open-boundary conditions are character
 ized by different left and right boundary spins which are related by conju
 gation. Our results show that topological phases are within close reach of
  the latest experiments on cold fermions in optical lattices.arXiv:1709.10
 409\n\n//indico.ictp.it/event/8445/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8445/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: SU(N) Quantum Magnet
 ism in 1D and 2D
DTSTART;VALUE=DATE-TIME:20180123T100000Z
DTEND;VALUE=DATE-TIME:20180123T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8439@ictp.it
DESCRIPTION:\n	In this talk I will motivate the interest for studying SU(N
 ) quantum magnetism\, and present three recent results on: i) a microscopi
 c model exhibiting SU(N) chiral spin liquids and their characterization\, 
 ii) the phase diagram of SU(N) two-leg spin ladders and iii) finite temper
 ature “phase diagrams” of SU(N) Heisenberg models on two-dimensional l
 attices.\n\n//indico.ictp.it/event/8439/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8439/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: A
  New Efficient Time Dependent Density Functional Algorithm for Large Syste
 ms: Theory\, Implementation and Plasmonics Applications
DTSTART;VALUE=DATE-TIME:20180125T100000Z
DTEND;VALUE=DATE-TIME:20180125T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8465@ictp.it
DESCRIPTION:\n	A new algorithm to solve the TDDFT equations in the space o
 f the density fitting auxiliary basis set has been developed and implement
 ed in ADF.1 The TDDFT equations are recast to a non-homogeneous linear sys
 tem\, whose size is much smaller than in Casida formulation\, allowing to 
 calculate a wide portion of the absorption spectrum for large systems. The
  method extracts the spectrum from the imaginary part of the polarizabilit
 y at any given photon energy\, avoiding the bottleneck of Davidson diagona
 lization. The original idea which made the present scheme very efficient c
 onsists in the simplification of the double sum over occupied-virtual pair
 s in the definition of the dielectric susceptibility\, which allows an eas
 y calculation of such matrix as a linear combination of constant matrices 
 with photon energy dependent coefficients. The method has been applied to 
 very different systems in nature and size (from H2 to [Au309]-)2\,3. In al
 l cases\, the maximum deviations found for the excitation energies with re
 spect to Casida approach are below 0.2 eV. The new algorithm has the merit
  to calculate the spectrum at whichever photon energy but also to allow a 
 deep analysis of the results\, in terms of Transition Contribution Maps\,4
  plasmon scaling factor analysis5\, induced density analysis\, and with a 
 fragment projection analysis6. Circular Dichroism of large systems becomes
  also affordable.7 References \n	1.O. Baseggio\, G. Fronzoni and M. Stener
 \, J. Chem. Phys.\, 2015\, 143\, 024106.\n	2. O. Baseggio\, M. De Vetta\, 
 G. Fronzoni\, M. Stener\, L. Sementa\, A. Fortunelli and A. Calzolari\, J.
  Phys. Chem. C\, 2016\, 120\, 12773.\n	3. A. Fortunelli\, L. Sementa\, V. 
 Thanthirige\, T. Jones\, M. Stener\, K. Gagnon\, A. Dass\, G. Ramakrishna\
 , J. Phys. Chem. Lett\, 2017\, 8\, 457.\n	4. S. Malola\, L. Lehtovaara\, J
 . Enkovaara and H. Häkkinen\, ACS Nano 2013\, 7\, 10263.\n	5. S. Bernadot
 te\, F. Evers\, C. R. Jacob\, J. Phys. Chem. C 2013\, 117\, 1863.\n	6. L. 
 Sementa\, G. Barcaro\, O. Baseggio\, M. De Vetta\, A. Dass\, E. Aprà\, M.
  Stener\, A. Fortunelli\, J. Phys. Chem. C submitted.\n	7. O. Baseggio\, D
 . Toffoli\, G. Fronzoni\, M. Stener\, L. Sementa\, A. Fortunelli J. Phys. 
 Chem. C\, 2016\, 120\, 24335.\n\n//indico.ictp.it/event/8465/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8465/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar:  Eigenstate Thermali
 zation Hypothesis in Two-Dimensional Large Central Charge CFT
DTSTART;VALUE=DATE-TIME:20180125T130000Z
DTEND;VALUE=DATE-TIME:20180125T140000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8501@ictp.it
DESCRIPTION:\n	By the eigenstate thermalization hypothesis (ETH)\, a highl
 y excited energy eigenstate behaves like a thermal state. It is related to
  the black hole information paradox by the AdS/CFT correspondence. I will 
 talk about ETH in two-dimensional large central charge CFT and compare the
  excited state of a primary operator with the thermal state. To define ETH
  precisely\, one needs to know how similar\, or equivalently dissimilar\, 
 the excited state and thermal state are. I will talk about short interval 
 expansions of the entanglement entropy\, relative entropy\, Jensen-Shannon
  divergence. For the canonical ensemble\, the excited state and thermal st
 ate are the same at the leading order of large central charge and are diff
 erent at the next-to-leading order. I will also discuss briefly ETH for ge
 neralized Gibbs ensemble\, and ETH for the descendant excited states.\n\n/
 /indico.ictp.it/event/8501/
LOCATION:SISSA\, Via Bonomea 265\, Room 128
URL://indico.ictp.it/event/8501/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Entanglement Entropi
 es of 1d Critical Systems\, Orbifold and Null-vectors
DTSTART;VALUE=DATE-TIME:20180130T100000Z
DTEND;VALUE=DATE-TIME:20180130T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8428@ictp.it
DESCRIPTION:\n	We present a new method to compute Renyi entropies in one-d
 imensional critical systems\, using the mapping of the Nth Renyi entropy t
 o a correlation function involving twist fields in a ZN cyclic orbifold. W
 hen the CFT describing the universality class of the critical system is ra
 tional\, so is the corresponding cyclic orbifold. It follows that the twis
 t fields are degenerate : they have null vectors. From these null vectors 
 a Fuchsian differential equation is derived\, although this step can be ra
 ther involved since the null-vector conditions generically involve fractio
 nal modes of the orbifold algebra. The last step is to solve this differen
 tial equation and build a monodromy invariant correlation function\, which
  is done using standard bootstrap methods. This method is applicable in a 
 variety of situations where no other method is available\, for instance wh
 en the subsystem A is not connected (e.g. two-intervals EE).\n\n//indico.i
 ctp.it/event/8428/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8428/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Measures of Irrevers
 ibility in Quantum Phase Space
DTSTART;VALUE=DATE-TIME:20180206T100000Z
DTEND;VALUE=DATE-TIME:20180206T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8429@ictp.it
DESCRIPTION:\n	Irreversibility\, which is usually quantified by the entrop
 y production\, is one of the most fundamental concepts in thermodynamics\,
  with deep scientific and technological consequences. It is also an emerge
 nt concept\, that stems from the complex interactions between a system and
  its environment. However\, as will be discussed in this talk\, the standa
 rd theory of entropy production breaks down in the quantum case\, in parti
 cular in the limit of zero temperature. Motivated by this\, I will present
  recent results which overcome these difficulties using the idea of phase 
 space entropy measures for bosonic systems. As I will show\, our theory no
 t only overcomes the zero temperature limitations but also allows one to e
 xtend the results to deal with non-equilibrium reservoirs. As an applicati
 on\, we will consider squeezed thermal baths\, which are instance of a gra
 nd-canonical Generalized Gibbs Ensemble and therefore allow us to construc
 t an Onsager transport theory\, akin to the theory of thermoelectricity. F
 inally\, I will also discuss how entropy production emerges from the persp
 ective of the environment and the system environment correlations.\n\n//in
 dico.ictp.it/event/8429/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8429/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: Self-Oscillations in Photovoltaic/Thermo
 electric/Fuel Cells and Biological Engines
DTSTART;VALUE=DATE-TIME:20180209T103000Z
DTEND;VALUE=DATE-TIME:20180209T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8490@ictp.it
DESCRIPTION:\n	A standard textbook picture of photovoltaic/thermoelectric/
 fuel cells (PTF) and biological engines (e.g. proton pumps) assumes a dire
 ct transformation of light\, heat or chemical energy into electric current
 . However\, this scheme is inconsistent with the basic principles of elect
 rodynamics and thermodynamics. To solve this problem the mechanism of coll
 ective electric charge self-oscillations fed by a constant energy supply\,
  has been proposed. A simple analog system - a steam engine used to propel
  the so-called "putt-putt boat" is used to illustrate the physics of work 
 generation in PTF. The main new prediction of the proposed theory is the e
 mission of electromagnetic radiation by PTF in THz or IR region\, or conve
 rsely\, resonant stimulation of PTF by electromagnetic oscillations. Remar
 kably\, both phenomena has been recently observed in photovoltaic devices 
 based on organic materials\, but treated as only auxiliary effects enhanci
 ng their efficiency.\n\n//indico.ictp.it/event/8490/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8490/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: 'Driven Tracer in Qu
 iescent Baths: Anomalous Diffusion and Induced-Interaction'
DTSTART;VALUE=DATE-TIME:20180213T100000Z
DTEND;VALUE=DATE-TIME:20180213T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8436@ictp.it
DESCRIPTION:\n	In this talk I will discuss the motion of a tracer particle
  driven by an external constant force through a quiescent lattice gas. Due
  to the interaction between the tracer and the bath particles\, here model
 led as an exclusion process\, the driven tracer reaches a steady-state whe
 n the external force and the friction exerted by the bath balance each oth
 er. The steady-state is characterised by a non equilibrium broad inhomogen
 eity of the bath density surrounding the driven tracer yielding a rich var
 iety of behaviours. I show that depending on the effective dimension of th
 e lattice\, the driven tracer exhibits from sub-diffusive to strong super-
 diffusive transport in the limit of high of bath particles. Moreover\, whe
 n more than one driven tracers exist\, the external and friction forces me
 diate an anisotropic attractive interacting force between the tracers\, le
 ading to the formation of clusters. I will show through numerical results 
 that such scenario extends into continuous-space and continuous-time dynam
 ics.\n\n//indico.ictp.it/event/8436/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8436/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Tan's Contact for a 
 Strongly Interacting One-dimensional Bose Gas in Harmonic Confinement: Uni
 versal Properties and Scaling Functions
DTSTART;VALUE=DATE-TIME:20180219T100000Z
DTEND;VALUE=DATE-TIME:20180219T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8423@ictp.it
DESCRIPTION:\n	The Tan's contact is an ubiquitous quantity in systems with
  zero-range interactions: it corresponds for example to the average intera
 ction energy\, to the weight of the tails of the momentum distribution fun
 ction at large momenta\, to the inelastic two-body loss rate\, just to cit
 e a few. We focus on strongly interacting one-dimensional bosons at finite
  temperature under harmonic confinement. As it is associated to short-dist
 ance correlations\, the calculation of the Tan's contact cannot be obtaine
 d within the Luttinger-liquid formalism. We derive the Tan's contact by em
 ploying an exact solution at infinite interactions\, as well as a local-de
 nsity approximation on the Bethe Ansatz solution for the homogeneous syste
 m and numerical ab initio calculations for finite interactions. In the lim
 it of infinite interactions\, we demonstrate its universal properties\, as
 sociated to the scale invariance of the model. We then obtain the full sca
 ling function for arbitrary interactions.\n\n//indico.ictp.it/event/8423/
LOCATION:ICTP
URL://indico.ictp.it/event/8423/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Seminar: Engineering Synt
 hetic Gauge Fields\, Weyl Semimetals\, and Anyons
DTSTART;VALUE=DATE-TIME:20180222T100000Z
DTEND;VALUE=DATE-TIME:20180222T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8528@ictp.it
DESCRIPTION:\n	Abstract.\n	I will present two topics of research in our gr
 oup related to synthetic topological quantum matter [1]: (i) topological p
 hases in 3D optical lattices\, more specifically a proposal for experiment
 al realization of Weyl semimetals in ultracold atomic gases [2]\, and (ii)
  anyons [3\,4]. I will present one possible route to engineer anyons in a 
 2D electron gas in a strong magnetic field sandwiched between materials wi
 th high magnetic permeability\, which induce electron-electron vector inte
 ractions to engineer charged flux-tube composites [3]. I will also discuss
  intriguing concepts related to extracting observables from anyonic wavefu
 nctions [4]: one can show that the momentum distribution is not a proper o
 bservable for a system of anyons [4]\, even though this observable was cru
 cial for the experimental demonstration of Bose-Einsten condensation or ul
 tracold fermions in time of flight measurements. I will show how time of f
 light measurements can be used to extract anyonic statistics [4].\n	[1] N.
  Goldman\, G. Juzeliunas\, P. Ohberg\, I. B. Spielman\, Rep. Prog. Phys. 7
 7\, 126401 (2014).\n	[2] Tena Dubček\, Colin J. Kennedy\, Ling Lu\, Wolfg
 ang Ketterle\, Marin Soljačić\, Hrvoje Buljan\, Weyl points in three-dim
 ensional optical lattices: Synthetic magnetic monopoles in momentum space\
 , Phys. Rev. Lett. 114\, 225301 (2015).\n	[3] M. Todorić\, D. Jukić\, D.
  Radić\, M. Soljačić\, and H. Buljan\, The Quantum Hall Effect with Wil
 czek's charged magnetic flux tubes instead of electrons\, arXiv:1710.10108
  [cond-mat.str-el]\n	[4] Tena Dubček\, Bruno Klajn\, Robert Pezer\, Hrvoj
 e Buljan\, Dario Jukić\, Quasimomentum distribution and expansion of an a
 nyonic gas\, Phys. Rev. A 97\, 011601(R) (2018)-\n\n//indico.ictp.it/event
 /8528/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8528/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Entanglement in the 
 XXZ Chain with a Gradient
DTSTART;VALUE=DATE-TIME:20180227T100000Z
DTEND;VALUE=DATE-TIME:20180227T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8437@ictp.it
DESCRIPTION:\n	We study the XXZ spin chain in the presence of a slowly var
 ying magnetic field gradient. First\, it is shown that a local density app
 roximation perfectly captures the ground-state magnetization profile. Furt
 hermore\, we demonstrate how the recently introduced technique of curved-s
 pacetime CFT yields a very good approximation of the entanglement profile.
  Finally\, the front dynamics is also studied after the gradient field has
  been switched off.\n\n//indico.ictp.it/event/8437/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8437/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: The Riemann Conjectu
 re
DTSTART;VALUE=DATE-TIME:20180228T100000Z
DTEND;VALUE=DATE-TIME:20180228T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8527@ictp.it
DESCRIPTION: \n	In August 1859 the young and still little known Bernhard 
 Riemann presented a paper to the Berlin Academic titled 'On the number of 
 primes less than a given quantity'. In the middle of that paper\, Riemann 
 made a guess - remark or conjecture - on the zeros of analytic function wh
 ich controls the growth of the primes. Mathematics has never been the same
  since.\n	 \n\n	The seminar presents the captive story behind this proble
 m\, which still remains one of the most famous unsolvable problems in math
 ematics\, and show how progress can be made on its solution employing idea
 s and methods which come physics\, i.e. from the stochastic world of rando
 m walks and alike.\n\n//indico.ictp.it/event/8527/
LOCATION:SISSA\, Via Bonomea 265\, rm 128
URL://indico.ictp.it/event/8527/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: P
 umping Spin-Chain Materials and the Emergence of Generalized Gibbs Ensembl
 es
DTSTART;VALUE=DATE-TIME:20180308T100000Z
DTEND;VALUE=DATE-TIME:20180308T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8530@ictp.it
DESCRIPTION:\n	Weak perturbations can drive an interacting many-particle s
 ystem far from its initial equilibrium state if one is able to pump into d
 egrees of freedom approximately protected by conservation laws. We develop
  a theory of weakly driven integrable systems and show that pumping can in
 duce large spin or heat currents even in the presence of integrability bre
 aking perturbations\, since it activates local and quasi-local approximate
  conserved quantities. The resulting steady state is qualitatively capture
 d by a generalized Gibbs ensemble with Lagrange parameters that depend on 
 the structure but not on the overall amplitude of perturbations nor the in
 itial state. We suggest to use spin-chain materials driven by terahertz ra
 diation to realize integrability-based spin and heat pumps. We also show t
 hat time-dependent generalized Gibbs ensembles accurately describe the tim
 e evolution of weakly driven\, approximately integrable systems.\n\n//indi
 co.ictp.it/event/8530/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8530/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: On the Complex Behav
 ior of Disordered Models in a Field
DTSTART;VALUE=DATE-TIME:20180313T100000Z
DTEND;VALUE=DATE-TIME:20180313T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8438@ictp.it
DESCRIPTION:\n	I will discuss several recent results\, both numerical and 
 analytical\, regarding disordered models in external field\, focusing main
 ly on random field ferromagnetic models and spin glasses in a field. I wil
 l mainly treat models with Ising variables\, but also some new results on 
 XY models will be presented. Exact analytical results are derived for mode
 ls defined on random graphs under the Bethe approximation\, while numerica
 l results are obtained via large scale Monte Carlo simulations for finite 
 dimensional models and via improved message passing algorithms for models 
 on random graphs.\n\n//indico.ictp.it/event/8438/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8438/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: M
 ulti-orbital Mott Physics and the Iron-based Superconductors
DTSTART;VALUE=DATE-TIME:20180315T100000Z
DTEND;VALUE=DATE-TIME:20180315T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8558@ictp.it
DESCRIPTION:\n	We review some surprising results on multi orbital Hubbard 
 models\, highlighting the role of the Hund’s coupling in driving a two-s
 tage Mott localization and an effective decoupling between the orbitals wh
 ich in turn leads to a remarkable differentiation between different orbita
 ls (orbital selectivity).\n	We show that the normal state of iron-based su
 perconductors can be rationalized and understood in this framework and we 
 address the implications on the phase diagram.\n\n//indico.ictp.it/event/8
 558/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8558/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Matrix Product State
 s for Relativistic Quantum Gauge Field Theories
DTSTART;VALUE=DATE-TIME:20180327T090000Z
DTEND;VALUE=DATE-TIME:20180327T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8503@ictp.it
DESCRIPTION:\n	In this talk I will describe our work on the simulation of 
 the Schwinger model (i.e. d=1+1 QED) with matrix product states (MPS). I w
 ill discuss some systematic aspects of our approach like the truncation of
  the local infinite bosonic gauge field Hilbert space\, or the incorporati
 on of local gauge invariance into the MPS anzats. Furthermore\, I will go 
 through some of our results: the simulation of the particle excitations ('
 mesons' of confined electron/positron pairs)\, of string breaking for heav
 y probe charges and last but not least of the real-time evolution that occ
 urs from a background electric field quench (i.e. the full quantum Schwing
 er effect).\n\n//indico.ictp.it/event/8503/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8503/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: "
 Many-Electron Quantum Simulation of Matter: Insight from Exact Time-Depend
 ent Real-Space Model Systems"
DTSTART;VALUE=DATE-TIME:20180405T090000Z
DTEND;VALUE=DATE-TIME:20180405T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8505@ictp.it
DESCRIPTION:\n	The theory of the electronic properties of condensed matter
  is a major challenge in many-particle quantum mechanics. The exact soluti
 on of the Schrödinger equation for more than a few interacting electrons 
 is impossible. Nevertheless\, powerful approximation techniques exist\, ba
 sed on underlying theoretical ideas that are themselves exact\, including 
 density-functional theory and many-body perturbation theory. To improve th
 e approximations made in the implementation of these theories for ground-s
 tate\, spectroscopic and time-dependent properties of many-electron system
 s\, I will present results using our iDEA code [1]\, which allows the exac
 t treatment of electron correlation and localisation for real-space one-di
 mensional systems of interacting electrons.\n	[1] http://www-users.york.ac
 .uk/~rwg3/idea.html\n\n//indico.ictp.it/event/8505/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8505/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Microcanonical and R
 esource-Theoretic Derivations of the Gran Canonical Thermal State of a Sys
 tem with Non-Commuting Charges
DTSTART;VALUE=DATE-TIME:20180417T090000Z
DTEND;VALUE=DATE-TIME:20180417T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8538@ictp.it
DESCRIPTION:\n	The grand canonical ensemble lies at the core of quantum an
 d classical statistical mechanics. A small system thermalizes to this ense
 mble while exchanging heat and particles with a bath. A quantum system may
  exchange quantities represented by operators that fail to commute. Whethe
 r such a system thermalizes and what form the thermal state has are questi
 ons about truly quantum thermodynamics. Here we investigate this thermal s
 tate from three perspectives. First\, we introduce an approximate microcan
 onical ensemble. If this ensemble characterizes the system-and-bath compos
 ite\, tracing out the bath yields the system's thermal state. This state i
 s expected to be the equilibrium point\, we argue\, of typical dynamics. F
 inally\, we define a resource-theory model for thermodynamic exchanges of 
 noncommuting observables. Complete passivity -- the inability to extract w
 ork from equilibrium states -- implies the thermal state's form\, too. Our
  work opens new avenues into equilibrium in the presence of quantum noncom
 mutation.\n	[Based on 1512.01189 with N. Yunger Halpern\, P. Faist and J. 
 Oppenheim.]\n\n//indico.ictp.it/event/8538/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8538/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: C
 omputational Studies of Biological Systems Related to Human Diseases
DTSTART;VALUE=DATE-TIME:20180419T090000Z
DTEND;VALUE=DATE-TIME:20180419T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8546@ictp.it
DESCRIPTION:\n	Computational biology is playing an ever-increasing importa
 nt role in understanding the atomistic level details of complex biological
  processes\, rationalizing mechanisms and predicting novel aspects\, which
  are inaccessible\, yet complementary\, to experiments and identify novel 
 drugs to interfere with biological mechanisms leading to diseases’ onset
 . This field evolves extremely fast\, so that microsecond/millisecond time
 -scale simulations are nowadays routinely performed to follow the dynamics
  of biological systems containing up to millions of atoms. In this talk\, 
 multi-scale simulations ranging from force field molecular dynamics to hyb
 rid quantum-classical (QM/MM) simulations\, in combination with free energ
 y techniques\, will enlighten the molecular mechanisms of complex biologic
 al processes ranging from (i) the splicing mechanism in self-splicing ribo
 zymes up to the eukaryotic spliceosome [1\,2]\, (ii) membrane–anchored e
 nzymes metabolizing hormones [3]\, and finally\, (iii) to signal transmiss
 ion in nuclear receptors and their polymorphic variants [4].\n	[1] Casalin
 o L.\, Palermo G.\, Rothlisberger U.\, Magistrato A. ‘Who Activates the 
 Nucleophile in Ribozyme Catalysis? An Answer from the Splicing Mechanism o
 f Group II Introns’ J. Am. Chem. Soc. (2016) 138 (33)\, 10374–10377 (C
 over Picture)\n	[2] Casalino L.\, Palermo G.\, Abdurakhmonova N.\, Rothlis
 berger U.\, Magistrato A. ’Development of Site-specific Mg2+-RNA force f
 ield parameters: a Dream or a Reality? Guidelines from combined Molecular 
 Dynamics and Quantum Mechanics Simulations’ J. Chem. Theor. Comput. (201
 7) 13 (1)\, 340-352\n	[3] Magistrato\, A.\; Sgrignani\, J.\; Krause\, R.\;
  Cavalli A.\; Single or multiple access channels to the CYP450s active sit
 e? An answer from free energy simulations of the human aromatase enzyme. J
  Phys Chem Lett 2017\, 8 (9)\, 2036-2042\n	[4] M Pavlin\, A Spinello\, M P
 ennati\, N Zaffaroni\, S Gobbi\, A Bisi\, G Colombo\, Magistrato A A Compu
 tational Assay of Estrogen Receptor α Antagonists Reveals the Key Common 
 Structural Traits of Drugs Effectively Fighting Refractory Breast Cancers 
 Scientific reports 2018\, 8 (1)\, 649\n\n//indico.ictp.it/event/8546/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8546/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Large Conformal Gold
 stone Mode Fluctuations in the SYK Model
DTSTART;VALUE=DATE-TIME:20180424T090000Z
DTEND;VALUE=DATE-TIME:20180424T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8504@ictp.it
DESCRIPTION:\n	This talk addresses the low energy physics of the Sachdev-Y
 e-Kitaev model\, a paradigm of strongly interacting (Majorana) quantum mat
 ter. A salient feature of this system is its exceptionally high degree of 
 symmetry under reparameterizations of physical time. At low energies this 
 symmetry is spontaneously broken and the ensuing infinite dimensional Gold
 stone mode manifold takes strong influence on all physical observables. We
  will discuss the effects of these fluctuations on the example of the so-c
 alled out of time ordered correlation functions\, diagnostic tools to desc
 ribe both manifestations of quantum chaos in the system and its conjecture
 d duality to an AdS2 gravitational bulk. While previous work predicts expo
 nential decay of these correlations in time our main finding is that at la
 rge time scales non-perturbative Goldstone mode fluctuations generate a cr
 ossover to power law behavior. This phenomenon must have ramifications in 
 the physics of the holographic bulk which\, however\, we do not understand
  at present.\n\n//indico.ictp.it/event/8504/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8504/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: E
 ntanglement Beyond Two Qubits
DTSTART;VALUE=DATE-TIME:20180503T090000Z
DTEND;VALUE=DATE-TIME:20180503T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8536@ictp.it
DESCRIPTION:\n	Entanglement is at heart of many interesting phenomena in q
 uantum physics. From determining important properties in many-body physics
  to practical communication using quantum light\, understanding and provin
 g entanglement is a paradigmatic task across many subdisciplines. It is re
 latively well understood for small Hilbert space dimensions\, however it b
 ecomes intractably complex for large dimensions and particle numbers. In t
 his talk I would like to give an introductory overview about state-of-the-
 art methods in entanglement theory for nonetheless navigating high-dimensi
 onal Hilbert spaces and reliably certifying entanglement within.\n\n//indi
 co.ictp.it/event/8536/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8536/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Dynamical Phase Tran
 sitions
DTSTART;VALUE=DATE-TIME:20180508T090000Z
DTEND;VALUE=DATE-TIME:20180508T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8548@ictp.it
DESCRIPTION:\n	Every physicist has a pretty clear idea of how to define eq
 uilibrium phases of matter (e.g. using free energy considerations)\, wheth
 er disordered or ordered (and if ordered\, a variety of situations can be 
 encountered). By contrast\, dynamics-wise\, no generic and clear-cut defin
 ition a dynamical phase (disordered\, intermittent\, uniform\, ergodicity-
 breaking\, pattern-forming\, etc) can be found. Instead\, one works on a s
 ystem-to-system basis.\n	I will illustrate\, on the simple example of a cl
 assical system of mutually excluding particles diffusing on a line\, how a
  robust definition of what a dynamical phase is can be achieved. As I will
  go along\, we will see that there may even exist transitions between dyna
 mical phases. On a formal level\, these dynamical transitions have everyth
 ing in common with the quantum phase transitions that appear in hard-conde
 nsed matter.\n	I will show that\, in turn\, approaching quantum problems w
 ith a classical eye\, can\, even with the simple example I'll discuss\, le
 ad to unexpected progress on the quantum side.\n\n//indico.ictp.it/event/8
 548/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8548/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Seminar: Possible Manifes
 tations of Quantum Disordered Dynamics in the Arrested Relaxation of a Mol
 ecular Ultracold Plasma
DTSTART;VALUE=DATE-TIME:20180523T090000Z
DTEND;VALUE=DATE-TIME:20180523T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8547@ictp.it
DESCRIPTION:Spontaneous avalanche to plasma splits the core of an ellipsoi
 dal Rydberg gas of nitric oxide. Ambipolar expansion first quenches the el
 ectron temperature of this core plasma. Then\, long-range\, resonant charg
 e transfer from ballistic ions to frozen Rydberg molecules in the wings of
  the ellipsoid quenches the centre-of-mass ion / Rydberg molecule velocity
  distribution. This sequence of steps gives rise to a remarkable mechanics
  of self-assembly\, in which the kinetic energy of initially formed hot el
 ectrons and ions drives an observed separation of plasma volumes. These dy
 namics adiabatically sequester energy in a reservoir of mass transport\, s
 tarting a process that anneals separating volumes to form an apparent glas
 s of strongly coupled ions and electrons. Short-time electron spectroscopy
  provides experimental evidence for complete ionization. The long lifetime
  of this system\, particularly its stability with respect to recombination
  and neutral dissociation\, suggests that this transformation affords a ro
 bust state of arrested relaxation\, far from thermal equilibrium. We argue
  that this state of the quenched ultracold plasma offers an experimental p
 latform for studying quantum many-body physics of disordered systems in th
 e long-time and finite energy-density limits. The qualitative features of 
 the arrested state fail to conform with classical models. Here\, we develo
 p a microscopic quantum description for the arrested phase based on an eff
 ective many-body spin Hamiltonian that includes both dipole-dipole and van
  der Waals interactions. This effective model offers a way to envision the
  quantum disordered non-equilibrium physics of this system.\n\n//indico.ic
 tp.it/event/8547/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8547/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Edge Behaviour of th
 e Periodic and the Free Boundary Schur Processes
DTSTART;VALUE=DATE-TIME:20180529T090000Z
DTEND;VALUE=DATE-TIME:20180529T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8518@ictp.it
DESCRIPTION:\n	The Schur process is in some sense a discrete analogue of a
  random matrix. Their edge behavior are known to be in the same universali
 ty class\, described by the Airy kernel and the Tracy-Widom distribution. 
 In this talk we consider two variants of the Schur process: the periodic c
 ase introduced by Borodin\, and the "free boundary" case recently introduc
 ed by us. We are able to compute their correlation functions in a unified 
 manner using the machinery of free fermions. We then investigate the edge 
 asymptotic behavior and show it corresponds to two nontrivial deformations
  of the Airy kernel and of the Tracy-Widom distribution. Based on joint wo
 rk with Dan Betea\, Peter Nejjar and Mirjana Vuletić.\n\n//indico.ictp.it
 /event/8518/
LOCATION:SISSA\, Via Bonomea 265\, room 128
URL://indico.ictp.it/event/8518/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics: Inducing Superconductivi
 ty in Two Dimensional Materials
DTSTART;VALUE=DATE-TIME:20180607T090000Z
DTEND;VALUE=DATE-TIME:20180607T094500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8601@ictp.it
DESCRIPTION:\n	It is long believed that any ordered phase may not exist in
  two dimensions (2D) due to the strong fluctuations. However recent discov
 eries during last decades have changed this picture drastically. A very in
 triguing question arises about the possibility of inducing superconducting
  correlations in 2D. Beside fundamental interests\, it is proven that high
  temperature superconductivity also has two dimensional physics and very r
 ecently a 2D superconductor at the interfaces between certain insulators h
 as been observed. Therefore a suitable answer can shine light on the pass-
 way to the consistent theory of high temperature superconductivity and hea
 vy fermion interface superconductors. In this talk I first review the gene
 ral properties of 2D superconductors beside some historical introduction. 
 Then I will focus on our own contribution to the field consisting of proxi
 mity effect in graphene and other 2D systems. In particular I will discuss
  over the exotic proximity effect in MoS2 which we have found due to the i
 nterplay of exchange field with intrinsic spin-orbit interaction.\n\n//ind
 ico.ictp.it/event/8601/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8601/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics: Gauge-Field-Induced Anom
 alous Interference Effects in Graphene SNS Junctions
DTSTART;VALUE=DATE-TIME:20180607T094500Z
DTEND;VALUE=DATE-TIME:20180607T101500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8602@ictp.it
DESCRIPTION:\n	It is well known that fictitious gauge fields are induced b
 y strain and elastic deformations in graphene. But the interference effect
 s attributed to these gauge fields remain almost unexplored. In this talk\
 , I will show how the supercurrent passing through the graphene-based Jose
 phson junctions can be influenced by the gauge fields. In particular we fi
 nd that the Josephson current is monotonically enhanced in the presence of
  a constant pseudo-magnetic field induced by arc-shape strain. On the othe
 r hand\, when both magnetic and pseudo-magnetic fields are present\, Fraun
 hofer-like oscillations as function of the real magnetic field flux are fo
 und. Intriguingly\, the combination of two kinds of gauge fields results i
 n strong localization of the Josephson current density and also appearance
  of large inflated vortex cores. These findings reveal unexpected interfer
 ence signatures of strain-induced gauge fields in graphene SNS junctions m
 ainly originated from the time-reversal symmetric property of the pseudo-m
 agnetic fields and provide unique tools for sensitive probing of the pseud
 omagnetic fields.\n\n//indico.ictp.it/event/8602/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8602/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics: Quantum Non-Local Effect
 s in Graphene Plasmonics
DTSTART;VALUE=DATE-TIME:20180608T093000Z
DTEND;VALUE=DATE-TIME:20180608T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8588@ictp.it
DESCRIPTION:\n	Plasmon modes represent a second kind of possible elementar
 y excitation for the Fermi liquid. Basically\, plasmon modes involve a coo
 perative motion of the system\, governed by the global interaction between
  the charge carriers. Plasmon modes in two-dimensional electron liquids il
 lustrate a long-wavelength dispersion that can be captured by classical eq
 uations of motion. The dispersion\, however\, departs from its classical v
 alue\, becoming sensitive to quantum effects\, by increasing the plasmon m
 omentum.\n	The response of electron systems to electrodynamic fields that 
 change rapidly in space is endowed by unique features\, including an exqui
 site spatial nonlocality. This can reveal much about the materials’ elec
 tronic structure that is invisible in standard probes that use gradually v
 arying fields. In this talk\, we will start by introducing the plasmonics 
 both in single and double layer graphene and describe the quantum non-loca
 lity effects in graphene plasmonics. Our theory involves three types of no
 nlocal quantum effects: single-particle velocity matching\, interaction-en
 hanced Fermi velocity\, and interaction-reduced compressibility. The near-
 field imaging experiments reveal a parameter-free match with the full quan
 tum description of the massless Dirac electron gas.\n\n//indico.ictp.it/ev
 ent/8588/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8588/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Partial Time-reversa
 l Transformation and Entanglement Negativity in Fermionic System
DTSTART;VALUE=DATE-TIME:20180618T090000Z
DTEND;VALUE=DATE-TIME:20180618T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8600@ictp.it
DESCRIPTION:\n	The partial transpose of density matrices in many-body syst
 ems has been known as a good candidate to diagnose quantum entanglement of
  mixed states. In particular\, it can be used to define the (logarithmic) 
 entanglement negativity for bosonic systems. In this talk\, I introduce pa
 rtial time-reversal transformation as an analog of partial transpose for f
 ermions. This definition naturally arises from the spacetime picture of pa
 rtially transposed density matrices in which partial transpose is equivale
 nt to reversing the arrow of time for one subsystem relative to the other 
 subsystem. I show the success of this definition in capturing the entangle
 ment of fermionic symmetry-protected topological phases as well as conform
 al field theories in (1+1) dimensions.\n\n//indico.ictp.it/event/8600/
LOCATION:SISSA\, Via Bonomea  265\, rm 128
URL://indico.ictp.it/event/8600/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar - Nanomotors: Symmetr
 y\, Chemotaxis\, Sedimentation and Anisotropy
DTSTART;VALUE=DATE-TIME:20180619T090000Z
DTEND;VALUE=DATE-TIME:20180619T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8580@ictp.it
DESCRIPTION:\n	Models for active matter have brought a new type of experim
 ents in statistical physics where the source of nonequilibrium lies within
  the particles themselves or on their surface. In this talk\, I will take 
 the viewpoint of molecular simulations to study matching experiments on ch
 emically-powered nanomotors: self-propulsion by symmetry-breaking\, chemot
 axis\, sedimentation and anisotropic nanomotors. I will comment on the des
 ign of consistent microscopic models with respect to energy conservation\,
  to chemical kinetic\, and to thermal fluctuations. As a perspective\, I w
 ill discuss enzyme nanomotors. On the one hand\, they consist in elaborate
  catalytic devices with interesting thermodynamic properties and on the ot
 her hand they might inspire or serve as molecular scale machine for nano- 
 and bio-technology in the coming years.\n\n//indico.ictp.it/event/8580/
LOCATION:SISSA\, Via Bonomea 263\, room 128
URL://indico.ictp.it/event/8580/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Atomistic Simulation Theory Seminar CMSP - Electronic Stopping fro
 m Non-Equilibrium Real-Time TDDFT Simulation: Development and Applications
DTSTART;VALUE=DATE-TIME:20180627T090000Z
DTEND;VALUE=DATE-TIME:20180627T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8609@ictp.it
DESCRIPTION:\n	I will discuss our recent development of massively-parallel
  real-time time-dependent density functional theory (RT-TDDFT) method base
 d on the planewave-pseudopotential formalism and its applications to model
 ing electronic stopping in condensed matters. \n\n	RT-TDDFT provides a con
 venient framework for numerically studying non- pertubative electron dynam
 ics coupled with lattice (i.e. ions) movements in large systems. Because o
 f the massively parallel nature of modern high-performance computers\, dev
 elopment of new numerical algorithms is often not free from considering it
 s parallelizability over large numbers of processors. We have developed a 
 highly-scalable implementation of RT-TDDFT in qb@ll code for studying larg
 e extended systems. We will discuss performance of our new implementation 
 over millions of processor cores\, reaching the peta-flops performance. I 
 will then discuss its application to the problem of electronic stopping. E
 lectronic stopping describes the transfer of the kinetic energy from a hig
 hly- energetic ion to electrons in condensed matter. The projectile ions b
 ear a highly localized electric field that is quite heterogeneous at the a
 tomistic scale\, and massive electronic excitations are produced in the pr
 ocess. Electronic stopping has been long studied within linear response th
 eory framework (e.g. Bethe theory). I will discuss how non-equilibrium sim
 ulations based on RT-TDDFT enable us to study this electronic excitation p
 rocess\, in particular for the importance case of liquid water under proto
 n irradiation. In addition to determining the energy transfer rate (i.e. e
 lectronic stopping power)\, our work reveals several key features in the e
 xcitation dynamics at the mesoscopic and molecular levels in liquid water 
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 nation:widow-orphan\;\n	font-size:12.0pt\;\n	font-family:"Times New Roman"
 \,serif\;\n	mso-fareast-font-family:"Times New Roman"\;}\n.MsoChpDefault\n
 	{mso-style-type:export-only\;\n	mso-default-props:yes\;\n	font-size:10.0p
 t\;\n	mso-ansi-font-size:10.0pt\;\n	mso-bidi-font-size:10.0pt\;\n	font-fam
 ily:Courier\;\n	mso-ascii-font-family:Courier\;\n	mso-fareast-font-family:
 Times\;\n	mso-hansi-font-family:Courier\;}\n@page WordSection1\n	{size:612
 .0pt 792.0pt\;\n	margin:72.0pt 72.0pt 72.0pt 72.0pt\;\n	mso-header-margin:
 36.0pt\;\n	mso-footer-margin:36.0pt\;\n	mso-paper-source:0\;}\ndiv.WordSec
 tion1\n	{page:WordSection1\;}\n-->\n\n//indico.ictp.it/event/8609/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8609/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar - Strongly Correlated Systems of Bosons a
 nd Fermions: Many-Body Phenomena and Numerical Methods
DTSTART;VALUE=DATE-TIME:20180628T090000Z
DTEND;VALUE=DATE-TIME:20180628T101500Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8612@ictp.it
DESCRIPTION:\n	Many interesting physical phenomena are connected to strong
 ly correlated systems\, which\, due to their complexity\, cannot usually b
 e studied analitically\, making numerical approaches essential. The develo
 pment of the latter and the study of the physical scenarios induced by str
 ong correlations are therefore both of great importance. In this context\,
  I will present the results of my numerical investigations of strongly cor
 related systems: specifically\, i) the ground-state phase diagram of a bos
 onic cluster-forming model of interest for cold atom experiments\, as well
  as ii) the ground-state properties of the fermionic t-J model\, a candida
 te Hamiltonian to describe high-T_c superconductivity\, in the presence of
  two mobile holes. Path Integral and Variational Monte Carlo have been cho
 sen as numerical techniques for the two problems\, respectively. The main 
 results I will discuss are the demonstration of a ground-state supersolid-
 supersolid transition in the bosonic scenario\, and of a d-wave hole bound
  state in the fermionic model. My investigation of the latter in the 2-hol
 e case is foundational for the application of my approach of choice to oth
 er problems\, of direct interest for high-T_c superconductivity\, where th
 e physical picture is still unclear (such as thecase of finite hole concen
 tration).\n\n//indico.ictp.it/event/8612/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8612/
END:VEVENT
BEGIN:VEVENT
SUMMARY: Joint ICTP/SISSA Statistical Physics Seminar: Coherence Generatin
 g Power of Quantum Processes
DTSTART;VALUE=DATE-TIME:20180703T090000Z
DTEND;VALUE=DATE-TIME:20180703T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8594@ictp.it
DESCRIPTION:\n	Given a maximal orthogonal resolution of the identity B in 
 the Hilbert space of a quantum system we define a measure of the coherence
  generating power of a unital operation with respect to B. This measure is
  the average coherence generated by the operation acting on an input ensem
 ble of B-diagonal states. We give its explicit analytical form in any dime
 nsion andprovide an operational protocol to directly detect it. We charact
 erize the set of unitaries with maximal coherence generating power and stu
 dy the properties of our measure when the unitary is drawn at random from 
 the Haar distribution. I will conclude by establishing a connection betwee
 n this formalism and the Hilbert-Schmidt geometry of maximal abelian algeb
 ras of operators and its application to eigenstate phase transitions in in
 teracting quantum systems e.g.\, many-body localization.\n	References:\n\n
 	https://journals.aps.org/pra/abstract/10.1103/PhysRevA.95.052307\n	https:
 //journals.aps.org/pra/abstract/10.1103/PhysRevA.95.052306\n	https://journ
 als.aps.org/pra/abstract/10.1103/PhysRevA.97.032304\n	https://aip.scitatio
 n.org/doi/10.1063/1.4997146\n\n//indico.ictp.it/event/8594/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8594/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: Ultracold Atoms with SU(N) Symmetry
DTSTART;VALUE=DATE-TIME:20180703T120000Z
DTEND;VALUE=DATE-TIME:20180703T130000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8613@ictp.it
DESCRIPTION:\n	The Fermi-Hubbard model is a cornerstone of modern condense
 d matter theory. It describes interacting electrons in solids\, notably fe
 aturing a metal to Mott insulator transition. In its extended SU(N>2)-symm
 etric form\, it has already attracted much interest in the context of mult
 i-orbital materials such as transition-metal oxides. In addition\, it has 
 been predicted to exhibit novel quantum magnetic phases and spin liquids w
 ith topological order. In this talk\, I will give a general introduction t
 o the SU(N) Fermi-Hubbard model and\, after discussing its general feature
 s\, I will present its experimental realization with ultracold alkaline-ea
 rth atoms in optical lattices. To this aim\, I will first describe in deta
 il how SU(N)-symmetry emerges for fermionic atoms with alkaline-earth-like
  electronic structure. Owing to the existence of metastable excited states
  as well as to the strong decoupling between the nuclear and the electroni
 c angular momenta\, these atoms are particularly well suited for the inves
 tigation of SU(N) symmetric models with orbital degrees of freedom. I will
  then present some experimental results obtained using ultracold ytterbium
  atoms trapped in a three-dimensional optical lattice. In particular\, I w
 ill report on the study of the equation of state of such system in various
  interaction regimes and for distinct values of N\, directly showing the e
 mergence of an SU(N)-symmetric incompressible Mott insulating phase. I wil
 l finally discuss perspectives towards probing novel SU(N) magnetic phases
  in optical lattices.\n\n//indico.ictp.it/event/8613/
LOCATION:ICTP Leonardo Building - Euler Lecture Hall
URL://indico.ictp.it/event/8613/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter Seminar: Interplay of Charge and Spin Degrees of 
 Freedom in Pnictides and Dichalcogenides
DTSTART;VALUE=DATE-TIME:20180705T090000Z
DTEND;VALUE=DATE-TIME:20180705T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8617@ictp.it
DESCRIPTION://indico.ictp.it/event/8617/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8617/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Seminar: From Skyrmions t
 o Z2 Vortices in Frustrated Chiral Magnets
DTSTART;VALUE=DATE-TIME:20180726T090000Z
DTEND;VALUE=DATE-TIME:20180726T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8630@ictp.it
DESCRIPTION:\n	The classical triangular antiferromagnetic Heisenberg model
  with Dzyaloshinskii-Moriya interactions in a magnetic field is studied. W
 e focus in particular on the emergence of a composite spin crystal phase t
 hat was recently observed in [Phys. Rev. B 92\, 214439 (2015)] for interme
 diate fields. This complex phase\, which corresponds to a lattice of Z2 vo
 rtices\, can be made up from three inter-penetrated skyrmion lattices\, on
 e for each sub-lattice of the original triangular one. We present our nume
 rical results and the explicit construction of the low-energy effective ac
 tion that reproduces the correct phenomenology. This effective action coul
 d serve as a starting point to study the coupling to charge carriers\, lat
 tice vibrations\, structural disorder and transport phenomena.\n\n//indico
 .ictp.it/event/8630/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8630/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Area-Law and Univers
 ality in the Statistics of the Subsystem Energy
DTSTART;VALUE=DATE-TIME:20180731T090000Z
DTEND;VALUE=DATE-TIME:20180731T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8581@ictp.it
DESCRIPTION:\n	Abstract:\n	Consider a quantum chain in its ground state an
 d then take a subdomain of this system with natural truncated hamiltonian.
  Since the total hamiltonian does not commute with the truncated hamiltoni
 an the subsystem can be in one of its eigenenergies with different probabi
 lities. Since the global energy eigenstates are locally close to diagonal 
 in the local energy eigenbasis we argue that the Shannon(Renyi) entropy of
  these probabilities follows an area-law for the gapped systems. When the 
 system is at the critical point the Shannon(Renyi) entropy follows a logar
 ithmic behaviour with a universal coefficient.\n	Our results show that the
  Shannon(Renyi) entropy of the subsystem energies closely mimics the behav
 iour of the entanglement entropy in quantum chains. We support the argumen
 ts by detailed numerical calculations performed on the transverse field XY
 -chain.\n\n//indico.ictp.it/event/8581/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8581/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: F
 urther Evidence for Quasi-Phases and Pseudo-Transitions in One-Dimensional
  Models
DTSTART;VALUE=DATE-TIME:20180809T093000Z
DTEND;VALUE=DATE-TIME:20180809T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8589@ictp.it
DESCRIPTION:\n	One-dimensional systems with short-range interactions canno
 t exhibit a long-range order at nonzero temperature. However\, there are s
 ome particular one-dimensional models\, such as the Ising-Heisenberg spin 
 models with a variety of lattice geometries\, which exhibit unexpected beh
 avior similar to the discontinuous or continuous temperature-driven phase 
 transition. Although these pseudo-transitions are not true temperature-dri
 ven transitions showing only abrupt changes or sharp peaks in thermodynami
 c quantities\, they may be confused while interpreting experimental data. 
 Here we consider the spin-\\frac{1}{2} Ising-XYZ diamond chain in the regi
 me when the model exhibits temperature-driven pseudo-transitions. We provi
 de a detailed investigation of how this phenomenon occurs in several physi
 cal quantities\, such as entropy\, magnetization\, specific heat\, magneti
 c susceptibily\, and correlation functions between distant spins that illu
 strates the properties of quasi-phases separated by pseudo-transitions. In
 evitably\, all correlation functions show the evidence of pseudo-transitio
 n. It is worth to mention that the correlation functions between distant s
 pins have an extremely large correlation length at pseudo-critical tempera
 ture.\n\n//indico.ictp.it/event/8589/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8589/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics: Electrocatalytic Convers
 ion of Organic Compounds at Solid/Liquid Interface from Ab Initio Molecula
 r Dynamics Simulation
DTSTART;VALUE=DATE-TIME:20180912T090000Z
DTEND;VALUE=DATE-TIME:20180912T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8610@ictp.it
DESCRIPTION:\n	Electrocatalytic conversion of biomass derived feedstocks o
 ffers a promising avenue for effective carbon recycling from renewable ene
 rgy resources. To retain economic viability of this target technology\, ra
 tional design of electrocatalysts with high activity and selectivity towar
 ds producing value-added chemicals and fuels is necessary. For improved co
 nversion of biomass resources to fuels and fine chemicals\, understanding 
 and controlling the aqueous-phase catalytic hydrogenation of organic compo
 unds on metals is crucial. Unlike gas-phase hydrogenation\, the presence o
 f water and the solid/liquid interface play critical roles in catalysis. A
 lthough there have been extensive studies in electrocatalysis\, there exis
 ts a lack of mechanistic exploration and molecular-level understanding of 
 electrocatalytic conversion of organic compounds specifically pertaining t
 o biomass feedstocks. Moreover\, these reactions occur at the solvated ele
 ctrode-electrolyte interface where complex interactions between the electr
 ode and solvent molecules have a critical influence on the reaction chemis
 try. In this talk\, I will address the effect of the solvent and the charg
 ed metal electrode on the reaction pathways and their capacity to undergo 
 reduction/hydrogenation. Results of molecular-scale structural/electronic 
 properties near the electrochemical interface and the reaction energetics 
 of target organic compounds obtained from density-functional-theory(DFT) b
 ased ab initio molecular dynamics (AIMD) simulations will be presented. Th
 e inferences drawn will be used to postulate design criteria for electroca
 talytic conversion of organic compounds from an experimental and theoretic
 al perspective.\n\n//indico.ictp.it/event/8610/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8610/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Glueing together Mod
 ular Flows with Free Fermions
DTSTART;VALUE=DATE-TIME:20180918T090000Z
DTEND;VALUE=DATE-TIME:20180918T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8637@ictp.it
DESCRIPTION:\n	We revisit the calculation of multi-interval modular Hamilt
 onians for free fermions using a Euclidean path integral approach. We show
  how the multi-interval modular flow is obtained by glueing together the s
 ingle interval modular flows. Our methods are based on a derivation of the
  non-local field theory describing the reduced density matrix\, and makes 
 manifest its non-local conformal symmetry and U(1) symmetry. We will show 
 how the non local conformal symmetry provides a simple calculation of the 
 entanglement entropy. Time-permitting\, we will connect multi-interval mod
 ular flows to the frame work of extended quantum field theory.\n\n//indico
 .ictp.it/event/8637/
LOCATION:SISSA\, Via Bonomea 263\, Room 128
URL://indico.ictp.it/event/8637/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics 'S
 YK Model with Quadratic Perturbations: The Route to a Non-Fermi-Liquid'
DTSTART;VALUE=DATE-TIME:20180920T090000Z
DTEND;VALUE=DATE-TIME:20180920T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8734@ictp.it
DESCRIPTION:\n	We study stability of the SYK4 model with a large but finit
 e number of fermions N with respect to a perturbation\, quadratic in ferm
 ionic operators. We develop  analytic perturbation theory in the amplitu
 de of the SYK2 perturbation and demonstrate stability of the SYK4\n	infra
 -red asymptotic behavior characterized by a Green function G(t) µ 1/t3/2\
 , with respect to weak  perturbation.  This result is supported by exac
 t numerical diagornalization.  Our results open the way to build a theory
  of non-Fermi-liquid states of strongly interacting fermions.\n A. V. Lun
 kin\, K. S. Tikhonov\, M. V. Feigel'man     arxiv:1806.11211\n\n//indi
 co.ictp.it/event/8734/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8734/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: L
 ight Scattering in Cavity Optomagnonics
DTSTART;VALUE=DATE-TIME:20180927T090000Z
DTEND;VALUE=DATE-TIME:20180927T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8744@ictp.it
DESCRIPTION:\n	Recent experiments on magnets put inside optical and microw
 ave cavities demonstrated a variety of interesting phenomena. After an ext
 ensive introduction\, we will first concentrate on asymmetry of Stokes and
  anti-Stokes peaks in light transmission through a cavity and present a th
 eory which explains this difference and also predicts only one peak in ref
 lection [1]. After that\, we will discuss cooling of magnons with light [2
 ].\n	[1] S. Sharma\, Ya. M. Blanter\, and G. E. W. Bauer\, Phys. Rev. B 96
 \, 094412 (2017)\n	[2] S. Sharma\, Ya. M. Blanter\, and G. E. W. Bauer\, P
 hys. Rev. Lett. 121\, 087205 (2018)\n\n//indico.ictp.it/event/8744/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8744/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: T
 ransport and Photochemistry from Multiscale Quantum Dynamics Simulations
DTSTART;VALUE=DATE-TIME:20181004T090000Z
DTEND;VALUE=DATE-TIME:20181004T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8746@ictp.it
DESCRIPTION:\n	In this seminar I will present results from time-dependent 
 density functional theory (TDDFT) simulations in real time\, where the cou
 pling of the Kohn-Sham Hamiltonian with classical force-fields or with a T
 ight-Binding (TB) approach provide multiscale treatments to tackle large m
 olecular or condensed phase systems. In particular\, the integration of TD
 DFT with a TB Hamiltonian allows to model quantum transport across molecul
 es immobilized between massive electrodes. On the other hand\, hybrid QM-M
 M Ehrenfest dynamics are used to describe photoisomerization or photodisso
 ciation of organics in solution.\n\n//indico.ictp.it/event/8746/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8746/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter and Statistical Physics Seminar: Amplitude Tuning
  of Steady State Entanglement in Strongly Driven Coupled Qubits
DTSTART;VALUE=DATE-TIME:20181005T093000Z
DTEND;VALUE=DATE-TIME:20181005T103000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8639@ictp.it
DESCRIPTION:\n	We report a new mechanism to generate dissipative steady st
 ate entanglement in coupled qubits driven by strong periodic fields. We de
 monstrate that steady entanglement can be induced and tuned by changing th
 e amplitude of the driving field. A rich dynamic behavior with {\\it creat
 ion\, death and revival} of entanglement can be observed near multiphoton 
 resonances. Coupled superconducting qubits are good candidates for the obs
 ervation of these effects.\n	Please see paper in arXiv:1806.09047 \n\n//in
 dico.ictp.it/event/8639/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8639/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: L
 andau-Zener-Stueckelberg-Majorana Interference"
DTSTART;VALUE=DATE-TIME:20181011T090000Z
DTEND;VALUE=DATE-TIME:20181011T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8632@ictp.it
DESCRIPTION://indico.ictp.it/event/8632/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8632/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Walking\, Weakly Fir
 st Order Phase Transitions and Complex CFTs
DTSTART;VALUE=DATE-TIME:20181016T090000Z
DTEND;VALUE=DATE-TIME:20181016T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8735@ictp.it
DESCRIPTION:\n	I will discuss walking behavior in gauge theories and weakl
 y first order phase transition in statistical models. Despite being phenom
 ena appearing in very different physical systems\, they both show a region
  of approximate scale invariance. They can be understood as a theory passi
 ng between two fixed points living at complex couplings\, which we call co
 mplex CFTs. By using conformal perturbation theory\, knowing the conformal
  data of the complex CFTs allows us to make predictions on the observables
  of the walking theory. As an example\, I will discuss the two dimensional
  Q-state Potts model with Q>4.\n\n//indico.ictp.it/event/8735/
LOCATION:SISSA\, Via Bonomea 265\, room 004
URL://indico.ictp.it/event/8735/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter & Statistical Physics SPECIAL SERIES OF TUTORIALS
 : Evolving Quantum States with Matrix Product Ansatz- Part I
DTSTART;VALUE=DATE-TIME:20181018T120000Z
DTEND;VALUE=DATE-TIME:20181018T133000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8769@ictp.it
DESCRIPTION:\n	KINDLY NOTE CHANGED TIME - from 14:00 to 15:30\n	PART I\n	I
 n this tutorial I will describe matrix product state (MPS) ansatz and its 
 generalization to operators\, and show how it can be used to calculate uni
 tary or dissipative quantum evolution. Such ansatz is\, in many situations
 \, rather efficient and allows one to study large many-body systems.\n	 \
 n	I will explain how to write states in the canonical MPS form and how to 
 perform transformations\, preserving optimal finite-rank description. The 
 tutorial will include blackboard exercises as well as hands-on numerical e
 xamples and will give sufficient knowledge to produce your own code.\n	 \
 n	 \n	 \n\n//indico.ictp.it/event/8769/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8769/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter & Statistical Physics SPECIAL SERIES OF TUTORIALS
 : Evolving Quantum States with Matrix Product Ansatz - Part II
DTSTART;VALUE=DATE-TIME:20181019T083000Z
DTEND;VALUE=DATE-TIME:20181019T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8770@ictp.it
DESCRIPTION:\n	PART II\n	In this tutorial I will describe matrix product s
 tate (MPS) ansatz and it's generalization to operators\, and show how it c
 an be used to calculate unitary or dissipative quantum evolution. Such ans
 atz is namely in some situations rather efficient and allows to study larg
 e many-body systems.\n	I will explain how to write states in the canonical
  MPS form and how to perform transformations\, preserving optimal finite-r
 ank description. The tutorial will include blackboard exercises as well as
  hands-on numerical examples and will give sufficient knowledge to produce
  your own code. \n	 \n\n//indico.ictp.it/event/8770/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8770/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Condensed Matter & Statistical Physics SPECIAL SERIES OF TUTORIALS
 : Evolving Quantum States with Matrix Product Ansatz- Part III
DTSTART;VALUE=DATE-TIME:20181025T083000Z
DTEND;VALUE=DATE-TIME:20181025T100000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8779@ictp.it
DESCRIPTION:\n	PART III\n	In this tutorial I will describe matrix product 
 state (MPS) ansatz and it's generalization to operators\, and show how it 
 can be used to calculate unitary or dissipative quantum evolution. Such an
 satz is namely in some situations rather efficient and allows to study lar
 ge many-body systems.\n	I will explain how to write states in the canonica
 l MPS form and how to perform transformations\, preserving optimal finite-
 rank description. The tutorial will include blackboard exercises as well a
 s hands-on numerical examples and will give sufficient knowledge to produc
 e your own code.\n\n//indico.ictp.it/event/8779/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8779/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar 'The Frustration in B
 eing Odd: Area Law Violation in Local Systems'
DTSTART;VALUE=DATE-TIME:20181106T100000Z
DTEND;VALUE=DATE-TIME:20181106T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8638@ictp.it
DESCRIPTION:\n	We demonstrate the existence of a new quantum phase of matt
 er that arises in antiferromagnetic spin chains with a weak frustration -j
 ust one bond in a large chain-. This is the case\, for instance\, of syste
 ms with an odd number of spins with periodic boundary conditions. Such new
  phase is extended\, gapless\, but not relativistic: the low-energy excita
 tions have a quadratic (Galilean) spectrum. Locally\, the correlation func
 tions on the ground state do not show significant deviations compared to t
 he non-frustrated case\, but correlators involving a number of sites (or d
 istances) scaling like the system size display new behaviors. In particula
 r\, the von Neumann entanglement entropy is found to follow new rules\, fo
 r which neither area law applies\, nor one has a divergence of the entropy
  with the system size. Such very long-range correlations are novel and of 
 potential technological interest. We display such new phase in a few proto
 typical chains using numerical simulations and we study analytically the p
 aradigmatic example of the Ising chain. Through these examples we argue th
 at this phase emerges generally in (weakly) frustrated systems with discre
 te symmetries.\n	Reference: Salvatore Marco Giampaolo\, Flávia Braga Ramo
 s\, Fabio Franchini: arXiv:1807.07055\n\n//indico.ictp.it/event/8638/
LOCATION:SISSA\, Via Bonomea 265\, Room 004
URL://indico.ictp.it/event/8638/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics: S
 imulating Higher Spatial Dimensions with Atoms and Photons
DTSTART;VALUE=DATE-TIME:20181115T100000Z
DTEND;VALUE=DATE-TIME:20181115T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8626@ictp.it
DESCRIPTION:\n	Spatial dimensionality deeply affects the physical phenomen
 a which can emerge in a system. Our physical world has three spatial dimen
 sions\, and so condensed matter physicists have long asked what happens wh
 en quantum particles are effectively confined to move in 1D\, 2D or 3D geo
 metries. However\, recent advances in ultracold atomic and photonics syste
 ms are now providing ways to go beyond these limitations\, in order to sim
 ulate the physics associated with four or more effective spatial dimension
 s. As I will present\, the development of techniques such as 'synthetic di
 mensions' and 'topological pumping' with photons or atoms can allow us to 
 explore higher-dimensional phenomena\, such as the 4D topological quantum 
 Hall effect\, for the first time.\n\n//indico.ictp.it/event/8626/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8626/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: A Study of a Non-Uni
 tary Statistical Model: Super Spin Chains and Intersecting Loops
DTSTART;VALUE=DATE-TIME:20181120T100000Z
DTEND;VALUE=DATE-TIME:20181120T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8758@ictp.it
DESCRIPTION:\n	We study a non-unitary spin chain with orthosymplectic symm
 etry that generalizes the O(N) model to any positive or negative integer N
 . The lack of unitarity allows a stable massless Goldstone phase to appear
 \, otherwise forbidden by the Mermin-Wagner theorem\, that is described by
  a supersphere sigma model. On the 2D lattice it is represented as a dense
  loop model with loop weight N in which crossings are allowed. Unlike the 
 usual O(N) loop model\, the presence of crossings makes the model flow to 
 a different regime where correlations involve logarithms. We compute these
  logarithmic critical exponents with field theory and the Bethe ansatz.\n\
 n//indico.ictp.it/event/8758/
LOCATION:SISSA Via Bonomea 265\, rm 128
URL://indico.ictp.it/event/8758/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Statistical Physics Seminar: Role of the Effectiv
 e Central Charge in Non-unitary Conformal Field Theories
DTSTART;VALUE=DATE-TIME:20181127T100000Z
DTEND;VALUE=DATE-TIME:20181127T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8753@ictp.it
DESCRIPTION:\n	Critical lattice models with a non-hermitian Hamiltonian ar
 e described by non-unitary CFTs. There are many physical applications such
  as open quantum systems\, geometrical problems or electronic disordered s
 ystems. We know that in many cases we can define the notion of effective c
 entral charge.I will show why this quantity is important in two problems: 
 the scaling of the entanglement entropy and the identification of universa
 lity classes in truncated models. I will illustrate the discussion with ex
 amples such as the XXZ model\, supersymmetric spin chains\, loop models an
 d truncations of the Brownian motion.\n\n//indico.ictp.it/event/8753/
LOCATION:SISSA\, Via Bonomea 265\, Room 128
URL://indico.ictp.it/event/8753/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics - 
 A Tale of Two Systems: How Fluorination Affects Amino Acid Solvation\, and
  How Oligomerization Influences the Mechanical Response of Protein Coil Co
 ils
DTSTART;VALUE=DATE-TIME:20181129T103000Z
DTEND;VALUE=DATE-TIME:20181129T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8624@ictp.it
DESCRIPTION:\n	The interplay between solutes and water is central to under
 stand the liquid world around us: water modulates the magnitude and the ki
 netics of the interactions between solutes\, and how solutes respond to me
 chanical force\; solutes affect the structure and dynamics of water. My gr
 oup has explored this interplay from the perspective of the solute and tha
 t of the water in a variety of systems\, using simulations. In this talk I
  will discuss recent results for two distinct systems: the interactions of
  fluorinated amino acids and water\, and the mechanical response of protei
 n helices and coiled coils to applied force.\n\n//indico.ictp.it/event/862
 4/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8624/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joint ICTP/SISSA Informal Condensed Matter Seminar: AA to AB via T
 wist in Bilayer Graphene: Moire' is Different
DTSTART;VALUE=DATE-TIME:20181130T103000Z
DTEND;VALUE=DATE-TIME:20181130T113000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8801@ictp.it
DESCRIPTION:\n	Single layer graphene hides manybody physics\, Bilayer grap
 hene\, with AA and AB registry\, exposes some of them. Twist springs more 
 surprises. A theory [1] for superconductivity seen after tiny commensurate
  twists in bilayer graphene is discused. We invoke resonating valence bon
 d (RVB) pairing contained in the dense p-pi electron fluid in graphene. RV
 B pairing fails to produce superconductivity in neutral graphene\, as elec
 tron density of states vanish at the Fermi level. In a twisted bilayer\, 
 interlayer tunneling adds equal number of electrons and holes in regions o
 f dominant AA registry. Self doped carriers use RVB pairing and develop ch
 arge -2e and +2e Cooper pair correlations\, in spite of Coulomb repulsion
 . Resulting periodic superlattice of Cooper pair puddles form a Josephson 
 lattice. Coulomb blockade makes it a Bosonic Mott insulator. Gate voltage
  dopes the Bose Mott insulator and interesting consequences follow.\n	[1]
  G. Baskaran\, arXiv:1804.00627\n\n//indico.ictp.it/event/8801/
LOCATION:SISSA\, Via Bonomea 265\, room 131
URL://indico.ictp.it/event/8801/
END:VEVENT
BEGIN:VEVENT
SUMMARY:ICTP Seminar Series in Condensed Matter and Statistical Physics - 
 Warm Dense Matter: Investigating Planets and Stars in the Laboratory
DTSTART;VALUE=DATE-TIME:20181206T100000Z
DTEND;VALUE=DATE-TIME:20181206T110000Z
DTSTAMP;VALUE=DATE-TIME:20261007T025322Z
UID:indico-event-8631@ictp.it
DESCRIPTION:\n	High-energy laser systems can be used to mimic extreme stat
 es of matter\, as found in the interiors of various celestial bodies\, in 
 the laboratory. Combining such laser systems with extremely bright X-ray s
 ources\, such as X-ray free electron lasers\, allows for studying exotic p
 hysical processes in real-time. This includes diamond precipitation\, whic
 h has been predicted to happen deep inside Neptune and Uranus\, and many o
 ther interesting phenomena.\n\n//indico.ictp.it/event/8631/
LOCATION:ICTP Leonardo Building - Luigi Stasi Seminar Room
URL://indico.ictp.it/event/8631/
END:VEVENT
END:VCALENDAR