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SUMMARY:Shreya Vardhan (MIT)
DTSTART:20210519T160000Z
DTEND:20210519T170000Z
DTSTAMP:20260423T023009Z
UID:UKYhepth/46
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKYhepth/46/
 ">An equilibrium approximation for quantum-informational observables in qu
 antum many-body systems and gravity</a>\nby Shreya Vardhan (MIT) as part o
 f Theoretical Physics Seminars (Kentucky)\n\n\nAbstract\nI will explain an
  approximation method that gives a simple universal expression for the Ren
 yi entropies of an equilibrated pure state in a chaotic quantum many-body 
 system. This expression is independent of the details of the initial state
  and hence reflects thermalization\, while also being manifestly consisten
 t with unitarity. I will discuss how applying this method to models of eva
 porating black holes leads to a derivation of replica wormholes\, which ha
 ve recently been used to address the information loss paradox in these mod
 els. More generally\, this approach elucidates the role played by Euclidea
 n path integrals in calculations of time-evolved Renyi entropies. It also 
 helps address the question of whether an average over theories is needed i
 n order to explain results from replica wormholes. I will also comment on 
 work in progress on applications of this approximation method to other qua
 ntum-informational quantities.\n\nPassword: 801404\n
LOCATION:https://researchseminars.org/talk/UKYhepth/46/
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