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SUMMARY:A non-perturbative construction of de Sitter late-time boundary - 
 Kamran Salehi Vaziri\, University of Amsterdam
DTSTART:20250320T160000Z
DTEND:20250320T170000Z
UID:TALK229501@talks.cam.ac.uk
CONTACT:Jackson Fliss
DESCRIPTION:In this talk\, I will review some of the recent progress in no
 n-perturbative quantum field theory in de Sitter such as Kallen-Lehmann an
 d partial wave expansion. I will start by explaining why we are interested
  in de Sitter and pointing out some of the differences and similarities be
 tween anti-de Sitter and de Sitter spacetimes. With the goal of bootstrapp
 ing de Sitter's conformal boundary\, I will propose a de Sitter-specific b
 ulk-to-boundary expansion\, with a continuous family of boundary operators
 . In the end\, I will derive an inversion formula for the bulk-to-boundary
  expansion\, where\, given a bulk theory\, the boundary operator content i
 s constructed as an integral of the bulk operator times the bulk-to-bounda
 ry propagator. These boundary operators exhibit two-point functions that i
 nclude contact terms alongside standard CFT two-point functions.
LOCATION:Potter Room (B1.19)
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