Constraining warm inflation with the cosmic microwave background

2004/02/12 by Lisa M. Hall, Lisa M. H. Hall, Ian G. Moss +1 · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #CMB cold spot #COSMIC cancer database #Classical mechanics #Cosmic background radiation #Cosmic microwave background #Cosmology and Gravitation Theories #Geophysics and Gravity Measurements #Inflation (cosmology) #Inflaton #Perturbation (astronomy) #Physics #Primordial fluctuations #Quantum electrodynamics #Quantum mechanics #Scalar (mathematics) #Scalar field #Spectral density #Spectral index #Spectral line #Statistical physics #Statistics #Theoretical physics #astro-ph #hep-ph

paper · pdf · doi:10.1016/j.physletb.2004.03.044

published as Phys.Lett. B589 (2004) 1-6 · 6 pages, 2 figures, RevTeX 4

arxiv created 2004/02/12 · openalex publication_date 2004/04/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We discuss the spectrum of scalar density perturbations from warm inflation when the friction coefficient Γ in the inflaton equation is dependent on the inflaton field. The spectral index of scalar fluctuations depends on a new slow-roll parameter constructed from Γ. A numerical integration of the perturbation equations is performed for a model of warm inflation and gives a good fit to the WMAP data for reasonable values of the model's parameters.

Citations

• A new inflationary universe scenario: A possible solution of the horizon, flatness, homogeneity, isotropy and primordial monopole problems
• Construction of a robust warm inflation mechanism
• Cosmology for Grand Unified Theories with Radiatively Induced Symmetry Breaking
• Thermal Properties of an Inflationary Universe
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Preliminary Maps and Basic Results

Cited by

• Warm inflation and its microphysical basis