arXiv:1006.0196 [astro-ph.CO]AbstractReferencesReviewsResources
One-loop corrections to the power spectrum in general single-field inflation
Nicola Bartolo, Emanuela Dimastrogiovanni, Alberto Vallinotto
Published 2010-06-01, updated 2010-11-30Version 2
We perform a thorough computation of the one-loop corrections from both scalar and tensor degrees of freedom to the power spectrum of curvature fluctuations for non-canonical Lagrangians in single-field inflation. We consider models characterized by a small sound speed c_{s}, which produce large non-Gaussianities. As expected, the corrections turn out to be inversely proportional to powers of c_{s}; evaluating their amplitudes it is then possible to derive some theoretical bounds on the sound speed by requesting the conditions necessary for perturbation theory to hold.
Comments: 39 pages, 5 figures, version accepted for publication in JCAP, added references for sections 2 and 3
Journal: JCAP 1011:003,2010
Keywords: general single-field inflation, power spectrum, one-loop corrections, produce large non-gaussianities, curvature fluctuations
Tags: journal article
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