Non-gaussianity in the strong regime of warm inflation

Abstract

The bispectrum of scalar mode density perturbations is analysed for the strong regime of warm inflationary models. This analysis generalises previous results by allowing damping terms in the inflaton equation of motion that are dependent on temperature. A significant amount of non-gaussianity emerges with constant (or local) non-linearity parameter $f_{NL}\sim 20$, in addition to the terms with non-constant $f_{NL}$ which are characteristic of warm inflation.

15 pages, 3 figures. New plots in v2

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• Warm Inflation and its Microphysical Basis
• The shape of primordial non-Gaussianity and the CMB bispectrum
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