Non-linear corrections to inflationary power spectrum

Jinn Ouk Gong; Hyerim Noh; Jai Chan Hwang

doi:10.1088/1475-7516/2011/04/004

Non-linear corrections to inflationary power spectrum

Jinn Ouk Gong, Hyerim Noh, Jai Chan Hwang

Department of Science Education

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

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 dominates and leading non-linear corrections remain 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.

Original language	English
Article number	004
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2011
Issue number	4
DOIs	https://doi.org/10.1088/1475-7516/2011/04/004
State	Published - Apr 2011

Keywords

cosmological perturbation theory
inflation
physics of the early universe

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10.1088/1475-7516/2011/04/004

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abstract = "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 dominates and leading non-linear corrections remain 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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AB - 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 dominates and leading non-linear corrections remain 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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Non-linear corrections to inflationary power spectrum

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