Constraining Warm Inflation with the Cosmic Microwave Background

Abstract

We discuss the spectrum of scalar density perturbations from warm inflation when the friction coefficient $\Gamma$ 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 $\Gamma$. 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.

arXiv comment6 pages, 2 figures, RevTeX 4

References in corpus (23)

• Efficient Computation of CMB anisotropies in closed FRW models
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
• False Vacuum Inflation with Einstein Gravity
• Warm Inflation
• Formalising the Slow-Roll Approximation in Inflation
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Parameter Estimation Methodology
• COBE, Gravitational Waves, Inflation and Extended Inflation
• Thermally Induced Density Perturbations in the Inflation Era
• Hybrid Inflation in Supergravity
• Scalar perturbation spectra from warm inflation
• Warm Inflation in the Adiabatic Regime- a Model, an Existence Proof for Inflationary Dynamics in Quantum Field Theory
• Interpolating the Stage of Exponential Expansion in the Early Universe: a possible alternative with no reheating
• Thermal Properties of an Inflationary Universe
• Perturbation Spectra in the Warm Inflationary Scenario
• The Spectrum of Density Perturbations produced during Inflation to Leading Order in a General Slow-Roll Approximation
• WKB approximation for inflationary cosmological perturbations
• Cosmological Perturbations with Multiple Fluids and Fields
• Construction of a robust warm inflation mechanism
• The Inflationary Perturbation Spectrum
• Mass Density Perturbations from Inflation with Thermal Dissipation
• Absence of isentropic expansion in various inflation models
• Momentum state engineering and control in Bose-Einstein condensates

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• Thermal Effects on Pure and Hybrid Inflation
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