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Title: Entropy production and curvature perturbation from dissipative curvatons

Abstract

Considering the curvaton field that follows dissipative slow-roll equation, we show that the field can lead to entropy production and generation of curvature perturbation after reheating. Spectral index is calculated to discriminate warm and thermal scenarios of dissipative curvatons from the standard curvaton model. In contrast to the original curvaton model, quadratic potential is not needed in the dissipative scenario, since the growth in the oscillating period is not essential for the model.

Authors:
 [1]
  1. Laboratory of Physics, Saitama Institute of Technology, Fusaiji, Okabe-machi, Saitama 369-0293 (Japan)
Publication Date:
OSTI Identifier:
22275420
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2010; Journal Issue: 09; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGICAL MODELS; COSMOLOGY; DISTURBANCES; ENTROPY; FIELD EQUATIONS; INDEXES; POTENTIALS

Citation Formats

Matsuda, Tomohiro. Entropy production and curvature perturbation from dissipative curvatons. United States: N. p., 2010. Web. doi:10.1088/1475-7516/2010/09/006.
Matsuda, Tomohiro. Entropy production and curvature perturbation from dissipative curvatons. United States. https://doi.org/10.1088/1475-7516/2010/09/006
Matsuda, Tomohiro. Wed . "Entropy production and curvature perturbation from dissipative curvatons". United States. https://doi.org/10.1088/1475-7516/2010/09/006.
@article{osti_22275420,
title = {Entropy production and curvature perturbation from dissipative curvatons},
author = {Matsuda, Tomohiro},
abstractNote = {Considering the curvaton field that follows dissipative slow-roll equation, we show that the field can lead to entropy production and generation of curvature perturbation after reheating. Spectral index is calculated to discriminate warm and thermal scenarios of dissipative curvatons from the standard curvaton model. In contrast to the original curvaton model, quadratic potential is not needed in the dissipative scenario, since the growth in the oscillating period is not essential for the model.},
doi = {10.1088/1475-7516/2010/09/006},
url = {https://www.osti.gov/biblio/22275420}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 09,
volume = 2010,
place = {United States},
year = {2010},
month = {9}
}