Unstable D-branes and String Cosmology
High Energy Physics - Theory
2007-05-23 v3
Abstract
Cosmological implication of rolling tachyons is reported in the context of effective field theory. With a brief review of rolling tachyons in both flat and curved spacetimes, we study the string cosmological model with both tachyon and dilaton. In the string frame, flat space solutions of both initial-stage and late-time are obtained in closed form. In the Einstein frame, every expanding solution is decelerating. When a Born-Infeld U(1) gauge field is coupled, enhancement of e-folding of scale factor is also discussed by numerical analysis.
Cite
@article{arxiv.hep-th/0404242,
title = {Unstable D-branes and String Cosmology},
author = {Chanju Kim and Hang Bae Kim and Yoonbai Kim and O-Kab Kwon and Chong Oh Lee},
journal= {arXiv preprint arXiv:hep-th/0404242},
year = {2007}
}
Comments
LaTex, 11 pages, 2 figures