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SUMMARY:Onsager’s regression hypothesis adjusted to quantum systems: the
 ory\, applications and outlook
DTSTART:20250515T121500Z
DTEND:20250515T130000Z
DTSTAMP:20260315T171100Z
UID:indico-event-252@indico.physik.uni-bielefeld.de
DESCRIPTION:Speakers: Christian Eidecker-Dunkel\n\nOnsager’s regression 
 hypothesis connects the temporal relaxation of close-to-equilibrium system
 s with their dynamical correlation functions at thermal equilibrium. While
  the hypothesis is provably correct in classical systems\, it is known to 
 fail in the quantumregime. On the other hand\, in [1] we have derived an a
 djusted version of Onsager’s regression hypothesis suitable for quantum 
 systems.In my presentation\, I will introduce the formalism established in
  [1]\, together with analytical and numerical considerations regarding its
  validity. Furthermore\, I will show the usefulness of this approach by ap
 plying it to selected spin-chain models to rigorously tackle the problem o
 f (re-)thermalization after a local quantum quench in these systems [2]. I
  will conclude my talk with an outlook for a possible generalization toget
 her with a useful approximation of the adjusted version of Onsager's regre
 ssion hypothesis.[1] P. Reimann and C. Eidecker-Dunkel\, Onsager’s regre
 ssion hypothesis adjusted to quantum systems\, Phys. Rev. B 110\, 014306 (
 2024)[2] P. Reimann and C. Eidecker-Dunkel\, Thermalization in a simple sp
 in-chain model\, Phys. Rev. B 111\, 054312 (2025)\n\nhttps://indico.physik
 .uni-bielefeld.de/event/252/
LOCATION:D5-153 (UHG)
URL:https://indico.physik.uni-bielefeld.de/event/252/
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