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SUMMARY:Geoffrey Penington (Stanford Institute for Theoretical Physics\, S
 tanford University\, California\, USA)
DTSTART:20200727T150000Z
DTEND:20200727T173000Z
DTSTAMP:20260423T011056Z
UID:QASTM/24
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/QASTM/24/">T
 he Replica Trick in Quantum Gravity: From the Ryu-Takayanagi formula to Is
 lands</a>\nby Geoffrey Penington (Stanford Institute for Theoretical Physi
 cs\, Stanford University\, California\, USA) as part of Quantum Aspects of
  Space-Time and Matter\n\n\nAbstract\nStarting with the famous Lewkowycz-M
 aldacena derivation of the Ryu-Takayanagi formula\, the replica trick has 
 played a central role in teaching us about entanglement and entropy in qua
 ntum gravity. I will review these ideas\, showing how a semiclassical anal
 ysis leads to the quantum extremal surface prescription\, entanglement wed
 ge reconstruction\, and eventually to the recent derivations of the Page c
 urve in evaporating black holes.\n
LOCATION:https://researchseminars.org/talk/QASTM/24/
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