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SUMMARY:Don Marolf (UCSB)
DTSTART:20200409T203000Z
DTEND:20200409T223000Z
DTSTAMP:20260423T035604Z
UID:IFQ/5
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/IFQ/5/">Baby
  Universes and Black Hole Information</a>\nby Don Marolf (UCSB) as part of
  It from Qubit\n\n\nAbstract\nIn the 1980’s\, work by Coleman and by Gid
 dings and Strominger linked the physics of spacetime wormholes to ‘baby 
 universes’ and an ensemble of theories. We revisit such ideas\, using fe
 atures associated with a negative cosmological constant and asymptotically
  AdS boundaries to strengthen the results\, introduce a change in perspect
 ive\, and connect with recent replica wormhole discussions of the Page cur
 ve. A key new feature is an emphasis on the role of null states. We explor
 e this structure in detail in simple topological models of the bulk that a
 llow us to compute the full spectrum of associated boundary theories.  We 
 also argue that similar properties must hold in any consistent gravitation
 al path integral.\n
LOCATION:https://researchseminars.org/talk/IFQ/5/
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