Theory of non-Gaussianity in warm inflation

Understand

The theory and methodology is developed to compute the bispectrum in warm inflation, leading to results for the non-linearity parameter and the shape of the bispectrum.

• Particular attention is paid to the study of the bispectrum in the regime of weak dissipation and how stochastic fluctuations affect the bispectrum.
• It is shown that, in contrast to the strong dissipative regime, the amplitude of non-Gaussianity is strongly dependent on the parameters governing the microscopic physics in the intermediate and weak dissipation warm inflation regimes.
• The most important results concern the shape of the bispectrum, which has two different, but distinct, forms in the weak and strong dissipative regimes.