The graceful exit in pre-big bang string cosmology
High Energy Physics - Theory
2009-10-31 v3
Abstract
We re-examine the graceful exit problem in the pre-big bang scenario of string cosmology, by considering the most general time-dependent classical correction to the Lagrangian with up to four derivatives. By including possible forms for quantum loop corrections we examine the allowed region of parameter space for the coupling constants which enable our solutions to link smoothly the two asymptotic low-energy branches of the pre-big bang scenario, and observe that these solutions can satisfy recently proposed entropic bounds on viable singularity free cosmologies.
Keywords
Cite
@article{arxiv.hep-th/9910169,
title = {The graceful exit in pre-big bang string cosmology},
author = {C. Cartier and E. J. Copeland and R. Madden},
journal= {arXiv preprint arXiv:hep-th/9910169},
year = {2009}
}
Comments
14 pages, 6 figures, JHEP class. Added new section on the classical correction and references