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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-9761
DTSTART:20260914T180000Z
DTEND:20260914T193000Z
DTSTAMP:20260828T223037Z
LAST-MODIFIED:20260824T144906Z
LOCATION:Chamberlin 5280
SUMMARY:De Sitter shockwave and static patch holography\, Theory Semin
 ar (High Energy/Cosmology)\, Yiming Chen\, Stanford University
DESCRIPTION:We study a version of de Sitter static patch holography in
  which the Euclidean gravitational path integral\, with an observer wo
 rldline included\, is conjectured to compute a trace. Motivated by rec
 ent evidence for this conjecture from the sphere path integral\, we te
 st it further by inserting operators along the observer worldline and 
 computing two-point functions and out-of-time-ordered four-point corre
 lators (OTOCs). Building on earlier work\, we compute the OTOC using t
 he shockwave formalism\, incorporating both observer recoil and gravit
 ational backreaction. I will explain that the OTOC conflicts with two 
 basic properties of a trace in a Hilbert space: cyclicity and positivi
 ty. This talk is based on arXiv:2607.14042.
URL:https://www.physics.wisc.edu/events/?id=9761
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