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SUMMARY:Thermalization and pseudolocality in extended quantum systems - Be
 njamin Doyon (King's College London)
DTSTART:20160113T113000Z
DTEND:20160113T123000Z
UID:TALK64626@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:The age-old questions of when and how thermalization occurs in
  extended systems have received a large amount of attention recently. It h
 as been found that many integrable models\, because of the presence of inf
 initely many conservation laws\, display generalized thermalization: gener
 alized Gibbs ensembles (GGE) describe equilibration states after long time
  evolutions with short-range Hamiltonians. It was also found that extended
  concepts of locality\, such as those of pseudolocal and quasilocal conser
 ved charges\, were sometimes involved in GGEs. In this talk I will discuss
  my recent results in this subject. Using precise definitions of pseudoloc
 al charges and GGEs\, I will describe simple conditions on the time-evolve
 d state and the dynamical response functions that guarantee generalized th
 ermalization. I will explain in which cases this implies ordinary (Gibbs) 
 thermalization. The results are based on studying a family of states defin
 ed by paths whose tangents are pseudolocal ch arges. The framework does no
 t involve integrability\, and all results are mathematically rigorous.<br>
 <br>Related Links<ul><li><a rel="nofollow" target="_blank">http://arxiv.or
 g/abs/1512.03713</a> - arXiv preprint of related paper</li></ul>
LOCATION:Seminar Room 1\, Newton Institute
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