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arXiv · 0708.2045

Sustainability of multi-field inflation and bound on string scale

Jinn-Ouk Gong
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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.

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Jinn-Ouk Gong. 2009-02-11. Sustainability of multi-field inflation and bound on string scale. https://doi.org/10.1142/s0217732309030552

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