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CATEGORIES:Isaac Newton Institute Seminar Series
SUMMARY:Thermalization and pseudolocality in extended quan
tum systems - Benjamin Doyon (King's College Londo
n)
DTSTART;TZID=Europe/London:20160113T113000
DTEND;TZID=Europe/London:20160113T123000
UID:TALK64626AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/64626
DESCRIPTION:The age-old questions of when and how thermalizati
on occurs in extended systems have received a larg
e amount of attention recently. It has been found
that many integrable models\, because of the prese
nce of infinitely many conservation laws\, display
generalized thermalization: generalized Gibbs ens
embles (GGE) describe equilibration states after l
ong time evolutions with short-range Hamiltonians.
It was also found that extended concepts of local
ity\, such as those of pseudolocal and quasilocal
conserved charges\, were sometimes involved in GGE
s. In this talk I will discuss my recent results i
n this subject. Using precise definitions of pseud
olocal charges and GGEs\, I will describe simple c
onditions on the time-evolved state and the dynami
cal response functions that guarantee generalized
thermalization. I will explain in which cases this
implies ordinary (Gibbs) thermalization. The resu
lts are based on studying a family of states defin
ed by paths whose tangents are pseudolocal ch arge
s. The framework does not involve integrability\,
and all results are mathematically rigorous.
Related Links
LOCATION:Seminar Room 1\, Newton Institute
CONTACT:INI IT
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