Sustainability of multi-field inflation and bound on string scale
Abstract
We study the effects of the interaction terms between the inflaton fields on the inflationary dynamics in multi-field models. With power law type potential and interactions, the total number of e-folds may get considerably reduced and can lead to unacceptably short period of inflation. Also we point out that this can place a bound on the characteristic scale of the underlying theory such as string theory. Using a simple multi-field chaotic inflation model from string theory, the string scale is constrained to be larger than the scale of grand unified theory.
Keywords
Cite
@article{arxiv.0708.2045,
title = {Sustainability of multi-field inflation and bound on string scale},
author = {Jinn-Ouk Gong},
journal= {arXiv preprint arXiv:0708.2045},
year = {2014}
}
Comments
(v1) 9 pages, 1 figure;(v2) 10 pages, references added; (v3) 15 pages, 4 figures, more discussions about parameters and observable quantities, references added, to appear in Modern Physics Letters A