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SUMMARY:Edgar Shaghoulian (University of Pennsylvania)
DTSTART:20220301T203000Z
DTEND:20220301T213000Z
DTSTAMP:20260423T024550Z
UID:HET/25
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/HET/25/">The
  central dogma and entanglement in de Sitter space</a>\nby Edgar Shaghouli
 an (University of Pennsylvania) as part of Purdue HET\n\n\nAbstract\nThe c
 entral dogma of black hole physics – which says that from the outside a 
 black hole can be described in terms of a quantum system with exp(Area/4G)
  states evolving unitarily – has recently been supported by computations
  indicating that the interior of the black hole is encoded in the Hawking 
 radiation of the exterior. In this paper\, we probe whether such a dogma f
 or cosmological horizons has any support from similar computations. The fa
 ct that the de Sitter bifurcation surface is a minimax surface (instead of
  a maximin surface) causes problems with this interpretation when trying t
 o import calculations analogous to the AdS case. This suggests anchoring e
 xtremal surfaces to the horizon itself\, where we formulate a two-sided ex
 tremization prescription and find answers consistent with general expectat
 ions for a quantum theory of de Sitter space: vanishing total entropy\, an
  entropy of A/4G when restricting to a single static patch\, an entropy of
  a subregion of the horizon which grows with the region size and threatens
  the central dogma until an island-like transition at half the horizon siz
 e when the entanglement wedge becomes the entire static patch interior\, a
 nd a de Sitter version of the Hartman-Maldacena transition.\n
LOCATION:https://researchseminars.org/talk/HET/25/
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