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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:7
UID:UW-Physics-Event-7049
DTSTART:20220930T203000Z
DTEND:20220930T213000Z
DTSTAMP:20260414T152708Z
LAST-MODIFIED:20220928T142641Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Black holes and quantum information\, Physics Department Collo
 quium\, Tom Hartman\, Cornell
DESCRIPTION:The black hole information paradox\, discovered by Hawking
  in 1976\, is that black hole evaporation seems to violate quantum mec
 hanics by creating too much entropy. I will describe the current statu
 s of this problem and discuss recent progress\, including a new calcul
 ation of the entropy of Hawking radiation that is compatible with unit
 ary quantum mechanics. There are two key ingredients: a link between c
 lassical geometry and quantum entanglement\, and higher topologies in 
 quantum gravity known as replica wormholes. I will also discuss the pr
 ospects for applying similar methods to cosmology in the early univers
 e\, which is similar in some ways to the inside of a black hole.
URL:https://www.physics.wisc.edu/events/?id=7049
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