Cosmological Perturbations with Multiple Fluids and Fields
天体物理学
2010-05-28 v3 广义相对论与量子宇宙学
高能物理 - 理论
摘要
We consider the evolution of perturbed cosmological spacetime with multiple fluids and fields in Einstein gravity. Equations are presented in gauge-ready forms, and are presented in various forms using the curvature (\Phi or \phi_\chi) and isocurvature (S_{(ij)} or \delta \phi_{(ij)}) perturbation variables in the general background with K and \Lambda. We clarify the conditions for conserved curvature and isocurvature perturbations in the large-scale limit. Evolutions of curvature perturbations in many different gauge conditions are analysed extensively. In the multi-field system we present a general solution to the linear order in slow-roll parameters.
引用
@article{arxiv.astro-ph/0103244,
title = {Cosmological Perturbations with Multiple Fluids and Fields},
author = {J. Hwang and H. Noh},
journal= {arXiv preprint arXiv:astro-ph/0103244},
year = {2010}
}
备注
19 pages, 6 figures, revised thoroughly; published version in Class. Quant. Grav