A note on accelerating cosmologies from compactifications and S-branes
高能物理 - 理论
2009-11-10 v2 天体物理学
广义相对论与量子宇宙学
高能物理 - 唯象学
摘要
We give a simple interpretation of the recent solutions for cosmologies with a transient accelerating phase obtained from compactification in hyperbolic manifolds, or from S-brane solutions of string/M-theory. In the four-dimensional picture, these solutions correspond to bouncing the radion field off its exponential potential. Acceleration occurs at the turning point, when the radion stops and the potential energy momentarily dominates. The virtues and limitations of these approaches become quite transparent in this interpretation.
引用
@article{arxiv.hep-th/0304124,
title = {A note on accelerating cosmologies from compactifications and S-branes},
author = {Roberto Emparan and Jaume Garriga},
journal= {arXiv preprint arXiv:hep-th/0304124},
year = {2009}
}
备注
9 pages, 1 figure. References added