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SUMMARY:Edgar Shaghoulian (Cornell U.)
DTSTART:20220112T150000Z
DTEND:20220112T160000Z
DTSTAMP:20260423T035539Z
UID:AnLy/4
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/AnLy/4/">The
  central dogma and cosmological horizons</a>\nby Edgar Shaghoulian (Cornel
 l U.) as part of AnLy Strings and Fields online seminars\n\n\nAbstract\nTh
 e central 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 computati
 ons indicating that the interior of the black hole is encoded in the Hawki
 ng radiation of the exterior. In this paper\, we probe whether such a dogm
 a for cosmological horizons has any support from similar computations. The
  fact that the de Sitter bifurcation surface is a minimax surface (instead
  of a maximin surface) causes problems with this interpretation when tryin
 g to import calculations analogous to the AdS case. This suggests anchorin
 g extremal surfaces to the horizon itself\, where we formulate a two-sided
  extremization prescription and find answers consistent with general expec
 tations 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 threat
 ens the central dogma until an island-like transition at half the horizon 
 size when the entanglement wedge becomes the entire static patch interior\
 , and a de Sitter version of the Hartman-Maldacena transition.\n
LOCATION:https://researchseminars.org/talk/AnLy/4/
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