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SUMMARY:CMSP Seminar (Joint ICTP/SISSA Statistical Physics): Rényi entrop
ies in one-dimensional quantum critical systems with open boundaries
DTSTART;VALUE=DATE-TIME:20221125T130000Z
DTEND;VALUE=DATE-TIME:20221125T140000Z
DTSTAMP;VALUE=DATE-TIME:20230205T144008Z
UID:indico-event-10143@ictp.it
DESCRIPTION:\n Andrei Rotaru\n (Paris\, Jussieu)\n \n Abstract:\n \n\n
The past 20 years have solidified quantum entanglement as a research topic
of continued and central interest for physicists working in domains as di
verse as high energy physics\, condensed matter theory and quantum informa
tion. Most relevantly for this talk\, entanglement measures have turned ou
t to be a powerful probe into the physics of 1D quantum critical systems.\
n \n Most known results for such setups address the entanglement in crit
ical quantum systems with periodic BC. For open systems\, there are result
s for the Rényi entropies and other entanglement measures of an interval
touching one of the boundaries with the rest of the system. However\, for
more generic bipartitions or mixed boundaries\, few exact calculations hav
e been completed.\n \n In this talk\, I will show how the second Rényi
entropy of an interval disconnected from the boundary can be computed exac
tly\, through CFT methods\, provided the same conformal boundary condition
is applied on both sides. This will be followed by a comparison with spin
chain numerics and a discussion of finite-size effects.\n \n Finally\,
I will also succinctly present some results for Rényi entropies in system
s with mixed boundaries.\n References:[1] M. Fagotti\, Phys. Rev. Lett. 1
28\, 110602 (2022) [arXiv:2110.11322][2] M. Fagotti\, V. Marić\, and L. Z
adnik\, arXiv:2205.02221.\n\n//indico.ictp.it/event/10143/
LOCATION:Hybrid Seminar room 138\, SISSA (via Bonomea 265) + via Zoom
URL://indico.ictp.it/event/10143/
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