Suppression of the large scale curvature perturbation by interacting fluids
Astrophysics
2009-11-11 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
The large-scale dynamics of a two-fluid system with a time dependent interaction is studied analytically and numerically. We show how a rapid transition can significantly suppress the large-scale curvature perturbation and present approximative formulae for estimating the effect. By comparing to numerical results, we study the applicability of the approximation and find good agreement with exact calculations.
Keywords
Cite
@article{arxiv.astro-ph/0609019,
title = {Suppression of the large scale curvature perturbation by interacting fluids},
author = {T. Multamaki and J. Sainio and I. Vilja},
journal= {arXiv preprint arXiv:astro-ph/0609019},
year = {2009}
}
Comments
7 pages, 4 figures. v2: Significant revisions: conclusion changed, references added, figures replaced