One-loop graviton corrections to the curvature perturbation from inflation

Details One-loop graviton corrections to the curvature perturbation from inflation One-loop graviton corrections to the curvature perturbation from inflation

Publishing date

2008-07-17

URL

arxiv.org/abs/0807.2790v3

Journals

JCAP 0811:016,2008

Science

Astronomy and Astrophysics

Field

Astrophysics

Additional info

LateX file; 29 pages; typo corrected; comments added to Sec. 3 and 4. Matches published version in JCAP

Type

Scientific paper

Digital Object Identifier

10.1088/1475-7516/2008/11/016

Abstract

We compute one-loop corrections to the power spectrum of the curvature perturbation in single-field slow-roll inflation arising from gravitons and inflaton interactions. The quantum corrections due to gravitons to the power spectrum of the inflaton field are computed around the time of horizon crossing and their effect on the curvature perturbation is obtained on superhorizon scales through the delta-N formalism. We point out that one-loop corrections from the tensor modes are of the same magnitude as those coming from scalar self-interactions, therefore they cannot be neglected in a self-consistent calculation.

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