Low-energy graceful exit in anisotropic string cosmology backgrounds
High Energy Physics - Theory
2009-11-07 v1 General Relativity and Quantum Cosmology
Abstract
We discuss the possibility of a smooth transition from the pre- to the post-big bang regime, in the context of the lowest-order string effective action (without higher-derivative corrections), taking into account with a phenomenological model of source the repulsive gravitational effects due to the back-reaction of the quantum fluctuations outside the horizon. We determine a set of necessary conditions for a successful and realistic transition, and we find that such conditions can be satisfied (by an appropriate model of source), provided the background is higher-dimensional and anisotropic.
Keywords
Cite
@article{arxiv.hep-th/0109137,
title = {Low-energy graceful exit in anisotropic string cosmology backgrounds},
author = {G. De Risi and M. Gasperini},
journal= {arXiv preprint arXiv:hep-th/0109137},
year = {2009}
}
Comments
13 pages, latex, 2 figures included using epsfig