Cosmological perturbation with two scalar fields in reheating after inflation
General Relativity and Quantum Cosmology
2008-11-26 v3 Astrophysics
Abstract
We investigate the cosmological perturbation of two-scalar field model during the reheating phase after inflation. Using the exact solution of the perturbation in long-wavelength limit, which is expressed in terms of the background quantities, we analyze the behavior of the metric perturbation. The oscillating inflaton field gives rise to the parametric resonance of the massless scalar field and this leads to the amplification of the iso-curvature mode of the metric perturbations.
Keywords
Cite
@article{arxiv.gr-qc/9709035,
title = {Cosmological perturbation with two scalar fields in reheating after inflation},
author = {A. Taruya and Y. Nambu},
journal= {arXiv preprint arXiv:gr-qc/9709035},
year = {2008}
}
Comments
13 pages, 2 Encapsulated Postscript figures, revtex, references are added and type miss is corrected