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Title: Cosmological perturbations for an inflaton field coupled to radiation

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.
Authors:
 [1]
  1. Department of Physics and Astronomy, University of Utah, 115 South 1400 East #201, Salt Lake City, Utah 84112-0830 (United States)
Publication Date:
OSTI Identifier:
22382043
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 01; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BOLTZMANN EQUATION; COSMOLOGICAL INFLATION; EVOLUTION; FLUIDS; NUMERICAL SOLUTION; PERTURBATION THEORY; STOCHASTIC PROCESSES