Cosmological perturbations for an inflaton field coupled to radiation

Abstract

Within the framework of the interacting fluid formalism, we provide the numerical solution to the Boltzmann equation describing the evolution of an inflaton field coupled to radiation. We study the behavior of the system during the slow-roll regime, in the case in which an additional stochastic source term is included in the set of equations, and we recover the expression for the cosmological perturbations previously obtained in the Warm inflation scenarios.

arXiv comment23 pages, 6 figures

References in corpus (66)

• Towards the Theory of Reheating After Inflation
• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• Reheating after Inflation
• Generating the curvature perturbation without an inflaton
• Hybrid Inflation
• Inflation Dynamics and Reheating
• Adiabatic CMB perturbations in pre-big bang string cosmology
• Effects of Cosmological Moduli Fields on Cosmic Microwave Background
• Warm Inflation
• Density Perturbations and Black Hole Formation in Hybrid Inflation
• Natural Inflation: Particle Physics Models, Power Law Spectra for Large Scale Structure, and Constraints from COBE
• MeV-scale Reheating Temperature and Thermalization of Neutrino Background
• What is the lowest possible reheating temperature?
• Production of massive particles during reheating
• Thermally Induced Density Perturbations in the Inflation Era
• Cosmological Constraints on Late-time Entropy Production
• Adiabatic Modes in Cosmology
• Warm Inflation and its Microphysical Basis
• Scalar perturbation spectra from warm inflation
• Warm Inflation in the Adiabatic Regime- a Model, an Existence Proof for Inflationary Dynamics in Quantum Field Theory
• Analytic and Numerical Study of Preheating Dynamics
• Preheating of Fermions
• Supernatural Inflation: Inflation from Supersymmetry with No (Very) Small Parameters
• The oscillation effects on thermalization of the neutrinos in the universe with low reheating temperature
• Large-scale curvature and entropy perturbations for multiple interacting fluids
• Perturbation Spectra in the Warm Inflationary Scenario
• Warm inflation model building
• General dissipation coefficient in low-temperature warm inflation
• Cosmic Density Perturbations from Late-Decaying Scalar Condensations
• Reheating Effects in the Matter Power Spectrum and Implications for Substructure
• Density fluctuations from warm inflation
• Multiple field inflation
• Shear viscous effects on the primordial power spectrum from warm inflation
• Adiabatic and entropy perturbations with interacting fluids and fields
• Non-gaussianity in fluctuations from warm inflation
• Cosmological Perturbations with Multiple Fluids and Fields
• Thermalization after inflation and production of massive stable particles
• Stochastic dynamics of correlations in quantum field theory: From Schwinger-Dyson to Boltzmann-Langevin equation
• Production of massive stable particles in inflaton decay
• Correlation-consistency cartography of the double inflation landscape
• On the consistency of warm inflation
• Reheating the Universe After Multi-Field Inflation
• Cosmological fluctuations of a random field and radiation fluid
• Cosmological perturbations in warm inflationary models with viscous pressure
• On Perturbations in Warm Inflation
• Chain Inflation in the Landscape: "Bubble Bubble Toil and Trouble"
• Natural Warm Inflation
• Natural Inflation: status after WMAP 3-year data
• Testing for double inflation with WMAP
• Constraint on the Effective Number of Neutrino Species from the WMAP and SDSS LRG Power Spectra
• Observational implications of mattergenesis during inflation
• Determining the regimes of cold and warm inflation in the susy hybrid model
• On the consistency of warm inflation in the presence of viscosity
• Curvature and isocurvature perturbations in a three-fluid model of curvaton decay
• Stability analysis for the background equations for inflation with dissipation and in a viscous radiation bath
• Density perturbations in warm inflation and COBE normalization
• Large-scale curvature perturbations with spatial and time variations of the inflaton decay rate
• Successful Modular Cosmology
• Inflating with the QCD Axion
• Non-gaussianity in the strong regime of warm inflation
• Natural inflation at the GUT scale
• Warming up for Planck
• Cosmological perturbations in warm-tachyon inflationary universe model with viscous pressure
• Fresh inflation with increasing cosmological parameter
• Delaying the waterfall transition in warm hybrid inflation
• Aspects of warm-flat directions

Cited by in corpus (26)

• Warm inflation as a way out of the swampland
• Minimal Warm Inflation
• Warm Inflation in the light of Swampland Criteria
• Probing the Early Universe with Axion Physics and Gravitational Waves
• Observational Constraints on New Exact Inflationary Scalar-field Solutions
• Late time transitions in the quintessence field and the $H_0$ tension
• Axion Miniclusters in Modified Cosmological Histories
• Warm brane inflation with an exponential potential: A consistent realization away from the swampland
• Metric preheating and radiative decay in single-field inflation
• The warm inflation story
• Observational Constraints on Monomial Warm Inflation
• Axion dark matter from Higgs inflation with an intermediate $H_{\ast }$
• Dynamical and observational constraints on the Warm Little Inflaton scenario
• Minimal warm inflation with complete medium response
• Observational Constraints on Warm Natural Inflation
• Hamilton-Jacobi formalism to warm inflationary scenario
• The QCD Axion and Gravitational Waves in light of NANOGrav results
• Probability of Warm Inflation in Loop Quantum Cosmology
• Warm Tachyon Inflation and Swampland Criteria
• Warm-tachyon Gauss-Bonnet inflation in the light of Planck 2015 data
• Warm-assisted natural inflation
• Observational Constraints on Warm Inflation in Loop Quantum Cosmology
• Opening the reheating box in multifield inflation
• Warm Higgs G-inflation: predictions and constraints from Planck 2015 likelihood
• Inflating without a flat potential: Viscous inflation
• Is warm inflation quasi-stable?