Evolution of the curvature perturbations during warm inflation

Details Evolution of the curvature perturbations during warm inflation Evolution of the curvature perturbations during warm inflation

2009-05-04

arxiv.org/abs/0905.0308v4

JCAP 0906:002,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

23 pages, 1 figure, fixed references, accepted for publication in JCAP

Scientific paper

10.1088/1475-7516/2009/06/002

This paper considers warm inflation as an interesting application of multi-field inflation. Delta-N formalism is used for the calculation of the evolution of the curvature perturbations during warm inflation. Although the perturbations considered in this paper are decaying after the horizon exit, the corrections to the curvature perturbations sourced by these perturbations can remain and dominate the curvature perturbations at large scales. In addition to the typical evolution of the curvature perturbations, inhomogeneous diffusion rate is considered for warm inflation, which may lead to significant non-Gaussianity of the spectrum.

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