Evolution of the curvature perturbations during warm inflation

Abstract

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.

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

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Cited by in corpus (15)

• Power spectrum for inflation models with quantum and thermal noises
• Shear viscous effects on the primordial power spectrum from warm inflation
• Cosmological fluctuations of a random field and radiation fluid
• Cosmological perturbations from an inhomogeneous phase transition
• Non-Gaussianity in the inflating curvaton
• Spotted Inflation
• Delta-N formalism for the evolution of the curvature perturbations in generalized multi-field inflation
• Particle production and dissipation caused by the Kaluza-Klein tower
• Remote Inflation: Hybrid-like inflation without hybrid-type potential
• Free light fields can change the predictions of hybrid inflation
• The gravitino problem in supersymmetric warm inflation
• Observational Constraints on Two-field Warm Inflation
• Trans-Planckian Effects in Warm Inflation
• Two-field Warm Inflation and Its Scalar Perturbations on Large Scales
• Entropy production and curvature perturbation from dissipative curvatons