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UID:DSC-23030
DTSTART;TZID=Europe/Berlin:20260710T170000
SEQUENCE:1783661954
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20260710T180000
URL:https://dresden-science-calendar.org/calendar/de/detail/23030
LOCATION:MPI-PKS\, Nöthnitzer Straße 3801187 Dresden
SUMMARY:Avdoshkin: CondMat for Dummies: Eigenstate thermalization in therma
 l first-order phase transitions
CLASS:PUBLIC
DESCRIPTION:Speaker: Alexander Avdoshkin\nInstitute of Speaker: Massachuset
 ts Institute of Technology\nTopics:\nPhysik\n Location:\n  Name: MPI-PKS (
 )\n  Street: Nöthnitzer Straße 38\n  City: 01187 Dresden\n  Phone: + 49 
 (0)351 871 0\n  Fax: \nDescription: The eigenstate thermalization hypothes
 is (ETH) posits how isolated quantum many-body systems thermalize\, assumi
 ng that individual eigenstates at the same energy density have identical e
 xpectation values of local observables in the limit of large systems. Whil
 e the ETH apparently holds across a wide range of interacting quantum syst
 ems\, I will discuss (based on our recent preprint arXiv:2601.08347) how i
 t requires generalization in the presence of thermal first-order phase tra
 nsitions (1OPT). I will introduce a class of all-to-all spin models\, feat
 uring 1OPT that stem from two distinct mean-field solutions that exchange 
 dominance in the many-body density of states as the energy is varied. We a
 rgued for a part of the energy spectrum\, eigenstate expectation values do
  not need to converge to the same thermal value. The system has a regime w
 ith coexistence of two classes of eigenstates at the same energy density\,
  and another regime with Schrodinger-cat-like eigenstates that are inter-b
 ranch superpositions. The results are supported by a semiclassical calcula
 tions and an exact diagonalization study of a microscopic spin model. I wi
 ll also cover how our works connects to broader (not yet understood) quest
 ions concerning dynamics of 1OPT and many-body metastability at the quantu
 m level.
DTSTAMP:20260713T211224Z
CREATED:20260709T053713Z
LAST-MODIFIED:20260710T053914Z
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