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SUMMARY:Total derivatives in cosmological perturbations: implications for 
 decoherence and Bell violation - Chon Man Sou 蘇俊文 (Tsinghua U.\, Bei
 jing)
DTSTART:20250224T130000Z
DTEND:20250224T140000Z
UID:TALK224944@talks.cam.ac.uk
CONTACT:Thomas Colas
DESCRIPTION:We examine the role of total time derivatives (boundary terms)
  in the action of cosmological perturbations and their impact on momentum-
 space entanglement\, including the processes of decoherence and two-mode s
 queezing. We also discuss the necessity of considering such terms from sev
 eral perspectives: the well-defined variational principle in gravity\, the
  integration-by-parts procedure in cosmological perturbations and the WKB 
 limit of the Wheeler-DeWitt equation. Finally\, we explore their relevance
  in a proposed cosmological Bell test utilizing momentum-space entanglemen
 t\, suggesting a possible window for Bell violation in minimal single-fiel
 d inflation. \n\nReferences: 2405.07141\, 2305.08071 and 2207.04435
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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