On resumming inflationary perturbations beyond one-loop

125Citations
Citations of this article
14Readers
Mendeley users who have this article in their library.
Get full text

Abstract

It is well known that the correlation functions of a scalar field in a quasi-de Sitter space exhibit at the loop level cumulative infrared effects proportional to the total number of e-foldings of inflation. Using the in-in formalism, we explore the behavior of these infrared effects in the large N limit of an O(N)-invariant scalar field theory with quartic self-interactions. By resumming all higher-order loop diagrams non-perturbatively, we show that the connected four-point correlation function, which is a signal of non-Gaussianity, is non-perturbatively enhanced with respect to its tree-level value. © IOP Publishing Ltd.

Cite

CITATION STYLE

APA

Riotto, A., & Sloth, M. S. (2008). On resumming inflationary perturbations beyond one-loop. Journal of Cosmology and Astroparticle Physics, 2008(4). https://doi.org/10.1088/1475-7516/2008/04/030

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free