Entropy production and curvature perturbation from dissipative curvatons

Details Entropy production and curvature perturbation from dissipative curvatons Entropy production and curvature perturbation from dissipative curvatons

2010-07-21

arxiv.org/abs/1007.3636v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

29 pages, 2 figures, accepted for publication in JCAP

Scientific paper

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.

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