Starts 3 May 2011 12:30
Ends 3 May 2011 20:00
Central European Time
Leonardo da Vinci Building Luigi Stasi Seminar Room
Strada Costiera, 11 I - 34151 Trieste (Italy)
Spin chains represent interesting quantum many-body systems, well realized in several novel materials. Theoretical understanding of transport in clean and disordered spin chains will be reviewed in the talk. T>0 spin stiffness will be discussed in connection with the integrability of the model. In particular, the interplay of electron correlations and random static disorder will be analysed with respect to possible many-body Anderson localization. It will be shown that a single static impurity as well 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