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SUMMARY:On the physical spectra of primordial perturbations from inflation
  - Silvia Pla Garcia (King's College London)
DTSTART:20240226T130000Z
DTEND:20240226T140000Z
UID:TALK212188@talks.cam.ac.uk
CONTACT:Thomas Colas
DESCRIPTION:It has been suggested that the effects of renormalization sign
 ificantly reduce the amplitude of the inflationary spectra at scales measu
 rable in the cosmic microwave background. Via a gauge-invariant analysis\,
  we compute the renormalized scalar and tensor power spectra and follow th
 eir evolution in an inflating universe that undergoes a transition to an F
 RW phase with a growing horizon.  For perturbations originating from Minko
 wski vacuum fluctuations\, we show that the standard prediction for the sp
 ectrum on superhorizon scales is a late-time attractor\, while it is UV fi
 nite at all times. Our result is independent of the equation of state afte
 r inflation\, showing that the standard prediction is fully robust.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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