One-loop corrections to the power spectrum in general single-field inflation
Cosmology and Nongalactic Astrophysics
2011-01-27 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
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.
Keywords
Cite
@article{arxiv.1006.0196,
title = {One-loop corrections to the power spectrum in general single-field inflation},
author = {Nicola Bartolo and Emanuela Dimastrogiovanni and Alberto Vallinotto},
journal= {arXiv preprint arXiv:1006.0196},
year = {2011}
}
Comments
39 pages, 5 figures, version accepted for publication in JCAP, added references for sections 2 and 3