Time-dependent supergravity solutions in null dilaton background
High Energy Physics - Theory
2008-11-26 v3
Abstract
A class of time dependent pp-waves with NS-NS flux in type IIA string theory is considered. The background preserves 1/4 supersymmetry and may provide a toy model of Big Bang cosmology with non trivial flux. At the Big Bang singularity in early past, the string theory is strongly coupled and Matrix string model can be used to describe the dynamics. We also construct some time dependent supergravity solutions for D-branes and analyze their supersymmetry properties.
Cite
@article{arxiv.hep-th/0605278,
title = {Time-dependent supergravity solutions in null dilaton background},
author = {Rashmi R. Nayak and Kamal L. Panigrahi and Sanjay Siwach},
journal= {arXiv preprint arXiv:hep-th/0605278},
year = {2008}
}
Comments
11 pages, a typo is fixed in eqn 20. To appear in Phys. Lett. B