Evolution of the curvature perturbations during warm inflation

2009/05/31 by Tomohiro Matsuda · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmological perturbation theory #Cosmology and Gravitation Theories #Curvature #Formalism (music) #Galaxies: Formation, Evolution, Phenomena #Horizon #Inflation (cosmology) #Perturbation (astronomy) #astro-ph.CO #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1088/1475-7516/2009/06/002

published as JCAP 0906:002,2009 · 23 pages, 1 figure, fixed references, accepted for publication in JCAP

openalex publication_date 2009/06/01 · arxiv created 2009/06/18 · arxiv updated 2010/04/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

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.

Citations

• Minimal Supersymmetric Higgs Bosons with Extra Dimensions as the Source of Reheating and All Matter
• Cosmological perturbations from inhomogeneous reheating, freeze-out, and mass domination
• Elliptic inflation: generating the curvature perturbation without slow-roll
• Non-Gaussianity from Inflation: Theory and Observations
• Generating the Curvature Perturbation at the End of Inflation in String Theory
• A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
• Non-Gaussianity from instant and tachyonic preheating
• Cosmological perturbations from varying masses and couplings
• Non-Gaussianity from the second-order cosmological perturbation
• Modulated inflation

Cited by

• Power spectrum for inflation models with quantum and thermal noises
• Shear viscous effects on the primordial power spectrum from warm inflation

Related

• Post-Inflationary Curvature Perturbations
• Inflation and Birth of Cosmological Perturbations
• The curvature perturbation generated by thermal fluctuations during thermal inflation
• δn formalism: A new formulation for the probability density of the curvature perturbation
• A geometric description of the non-Gaussianity generated at the end of multi-field inflation