Towards A Nonsingular Tachyonic Big Crunch
High Energy Physics - Theory
2008-11-26 v2 Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We discuss an effective field theory background containing the gravitational field, the dilaton and a closed string tachyon, and couple this background to a gas of fundamental strings and D strings. Allowing for the possibility of a non-vanishing dilaton potential of Casimir type, we demonstrate the possibility of obtaining a nonsingular, static tachyon condensate phase with fixed dilaton. The time reversal of our solution provides a candidate effective field theory description of a Hagedorn phase of string gas cosmology with fixed dilaton.
Keywords
Cite
@article{arxiv.0705.3265,
title = {Towards A Nonsingular Tachyonic Big Crunch},
author = {Robert H. Brandenberger and Andrew R. Frey and Sugumi Kanno},
journal= {arXiv preprint arXiv:0705.3265},
year = {2008}
}