Non-linear corrections to inflationary power spectrum

Details Non-linear corrections to inflationary power spectrum Non-linear corrections to inflationary power spectrum

2010-11-11

arxiv.org/abs/1011.2572v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

(v1) 14 pages, 2 figures; (v2) references added and discussions expanded, including a new version of Figure 2, to appear in Jo

Scientific paper

We study non-linear contributions to the power spectrum of the curvature perturbation on super-horizon scales, produced during slow-roll inflation driven by a canonical single scalar field. We find that on large scales the linear power spectrum completely dominates and leading non-linear corrections remain totally negligible, indicating that we can safely rely on linear perturbation theory to study inflationary power spectrum. We also briefly comment on the infrared and ultraviolet behaviour of the non-linear corrections.

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