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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-6115
DTSTART:20201113T200000Z
DTEND:20201113T210000Z
DTSTAMP:20260414T104333Z
LAST-MODIFIED:20201104T160542Z
LOCATION:For zoom link\, sign up at: https://groups.google.com/a/g-gro
 ups.wisc.edu/d/forum/theoryseminars/join
SUMMARY:Two topics in quantum gravity\, Theory Seminar (High Energy/Co
 smology)\, Oliver Janssen\, ICTP\, Trieste
DESCRIPTION:I will discuss two topics in quantum gravity\, both involv
 ing the gravitational path integral. In the first part I will introduc
 e the “no-boundary wave function”\, a path integral over geometrie
 s on compact four-manifolds which solves the Wheeler-DeWitt equation. 
 I will then outline how this object can be computed\, and comment on i
 ts interpretation\, in the scenario of minimally coupled scalar field 
 matter subject to a potential energy function of the slow-roll type. I
 n the second part I will comment on a proposal which identifies bulk g
 ravitational path integrals with ensemble averages of boundary partiti
 on functions. This talk is based on 2009.06282 and work in progress.
URL:https://www.physics.wisc.edu/events/?id=6115
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