One-Loop Superstring Cosmology and the Non-Singular Universe
高能物理 - 理论
2009-10-30 v2 天体物理学
广义相对论与量子宇宙学
摘要
We study the cosmological implications of the one-loop terms in the string expansion. In particular, we find non-singular solutions which interpolate between a contracting universe and an expanding universe, and show that these solutions provide a mechanism for removing the initial conditions problem peculiar to spatially closed FRW cosmologies. In addition, we perform numerical calculations to show that the non-singular cosmologies do not require a careful choice of initial conditions, and estimate the likely magnitude of higher order terms in the string expansion.
引用
@article{arxiv.hep-th/9605173,
title = {One-Loop Superstring Cosmology and the Non-Singular Universe},
author = {Richard Easther and Kei-ichi Maeda},
journal= {arXiv preprint arXiv:hep-th/9605173},
year = {2009}
}
备注
19 pages, 3 figures (postscript), Latex2e, discussion of curvature invariants added. To appear in Phys. Rev. D