Primordial fluctuations in the warm inflation scenario with a more realistic coarse - grained field

Details Primordial fluctuations in the warm inflation scenario with a more realistic coarse - grained field Primordial fluctuations in the warm inflation scenario with a more realistic coarse - grained field

1999-08-24

arxiv.org/abs/gr-qc/9908063v3

Nucl.Phys. B563 (1999) 245-258

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, no figures (revtex file)

Scientific paper

10.1016/S0550-3213(99)00537-4

I study a semiclassical approach to warm inflation scenario introduced in previous works. In this work, I define the fluctuations for the matter field by means of a new coarse - grained field with a suppression factor G. This field describes the matter field fluctuations on the now observable scale of the universe. The power spectrum for the fluctuations of the matter field is analyzed in both, de Sitter and power - law expansions for the universe. The constraint for the spectral index gives a constraint for the mass of the matter field in the de Sitter expansion and a constraint for the friction parameter in the power - law expansion for the universe.

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