To the study of non-Gaussianity in two-field slow-roll inflation
Cosmology and Nongalactic Astrophysics
2013-02-26 v2
Abstract
The general expression for the second order large scale curvature perturbation in the form of a functional over a background solution is derived. The explicit expressions was obtained for two special forms of the inflationary potential. In the considered cases, it is shown that a significant level of non-Gaussianity can be generated during the super-Hubble evolution only if nonadiabatic perturbations are non-negligible at the end of inflation.
Keywords
Cite
@article{arxiv.1301.6552,
title = {To the study of non-Gaussianity in two-field slow-roll inflation},
author = {N. A. Koshelev},
journal= {arXiv preprint arXiv:1301.6552},
year = {2013}
}
Comments
15 pages,v2: more careful consideration in section 4, abstract and conclusion corrected, references added