Axions and the Graceful Exit Problem in String Cosmology
High Energy Physics - Theory
2009-09-15 v1 Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We reexamine the graceful exit problem in the Pre-Big-Bang inflationary scenario. The dilaton-gravity action is generalized by adding the axion and a general axion/dilaton potential. We provide a phase space analysis of the dynamics which leads us to extend the previous no-go theorem and rule out the branch change necessary for graceful exit in this context.
Cite
@article{arxiv.hep-th/9510117,
title = {Axions and the Graceful Exit Problem in String Cosmology},
author = {N. Kaloper and R. Madden and K. A. Olive},
journal= {arXiv preprint arXiv:hep-th/9510117},
year = {2009}
}
Comments
12 pages, latex, no figures