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UID:DSC-21507
DTSTART;TZID=Europe/Berlin:20250811T163000
SEQUENCE:1754890546
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20250811T173000
URL:https://www.dresden-science-calendar.de/calendar/de/detail/21507
LOCATION:MPI-PKS\, Nöthnitzer Straße 3801187 Dresden
SUMMARY:Keyserlingk: Subexponential decay of local correlations from diffus
 ion-limited dephasing
CLASS:PUBLIC
DESCRIPTION:Speaker: Dr. Curt von Keyserlingk\nInstitute of Speaker: King's
  College London\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: Chaotic quantum systems at finite energy density 
 are expected to act as their own heat baths\, rapidly dephasing local quan
 tum superpositions. We argue that in fact this dephasing is subexponential
  for chaotic dynamics with conservation laws in one spatial dimension: all
  local correlation functions decay as stretched exponentials or slower. Th
 e stretched exponential bound is saturated for operators that are orthogon
 al to all hydrodynamic modes. This anomalous decay is a quantum coherent e
 ffect\, which lies beyond standard fluctuating hydrodynamics\; it vanishes
  in the presence of extrinsic dephasing. Our arguments are general\, subje
 ct principally to the assumption that there exist zero-entropy charge sect
 ors (such as the particle vacuum) with no nontrivial dynamics: slow relaxa
 tion is due to the persistence of regions resembling these inert vacua\, w
 hich we term \"voids\". In systems with energy conservation\, this assumpt
 ion is automatically satisfied because of the third law of thermodynamics.
DTSTAMP:20260416T021939Z
CREATED:20241116T063844Z
LAST-MODIFIED:20250811T053546Z
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