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SEQUENCE:1
UID:UW-Physics-Event-6111
DTSTART:20201016T190000Z
DTEND:20201016T200000Z
DTSTAMP:20260415T003603Z
LAST-MODIFIED:20201015T001841Z
LOCATION:For zoom link\, sign up at: https://groups.google.com/a/g-gro
 ups.wisc.edu/d/forum/theoryseminars/join
SUMMARY:Islands\, cosmology\, and baby universes\, Theory Seminar (Hig
 h Energy/Cosmology)\, Arjun Kar\, University of British Columbia
DESCRIPTION:I will present a "minimal" model of black hole evaporation
  which uses replica wormholes and the island formula to recover the un
 itary Page curve.  This model combines advantageous features of previo
 us models of evaporation to give a more flexible formalism.  As an exa
 mple of its flexibility\, I will discuss its application to de Sitter 
 black holes\, where the island formula yields results which seem to be
  in tension with some old expectations about quantum gravity in de Sit
 ter space.  Finally\, time permitting\, I will describe more general i
 mplications of wormholes in the gravitational path integral by extendi
 ng a toy model of Marolf and Maxfield to include spin structure.  The 
 inclusion of spin structure presents interesting complications when co
 nstructing the baby universe Hilbert space\, as well as the dual of a 
 single boundary theory.
URL:https://www.physics.wisc.edu/events/?id=6111
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