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SUMMARY:Soft de Sitter Effective Theory - Dan Green\, UCSD
DTSTART:20200622T150000Z
DTEND:20200622T160000Z
UID:TALK142636@talks.cam.ac.uk
CONTACT:David Stefanyszyn
DESCRIPTION:Understanding the quantum evolution of a de Sitter universe on
  superhorizon scales is notoriously difficult.  To address this challenge\
 , we introduce the Soft de Sitter Effective Theory (SdSET)\, which holds f
 or superhorizon modes whose (comoving) momentum is far below the UV cutoff
 \, the (comoving) horizon.  SdSET makes power counting manifest while pres
 erving the low energy symmetries\, simplifying many aspects of perturbatio
 n theory outside the horizon.  As an example\, we will give a simple deriv
 ations of the all orders conservation of the adiabatic modes and gravitati
 onal waves.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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