Scale-invariant perturbations from chaotic inflation

Chris Byrnes, David Wands

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Abstract

Vacuum fluctuations in the inflaton field driving chaotic inflation with a quadratic potential give a red spectrum of primordial density perturbations, n=0.97. However angular fluctuations in an O(N)-symmetric quadratic potential have a very nearly scale-invariant spectrum, n=0.9998. We investigate the possibility that these isocurvature field perturbations could give the dominant contribution to the primordial density perturbation after inflation.
Original languageEnglish
Pages (from-to)063509
Number of pages1
JournalPhysical Review D
Volume73
Issue number6
DOIs
Publication statusPublished - 10 Mar 2006

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