Exact inhomogeneous Einstein-Maxwell-Dilaton cosmologies
Abstract
We present solution generating techniques which permit to construct exact inhomogeneous and anisotropic cosmological solutions to a four-dimensional low energy limit of string theory containing non-minimally interacting electromagnetic and dilaton fields. Some explicit homogeneous and inhomogeneous cosmological solutions are constructed. For example, inhomogeneous exact solutions presenting Gowdy - type EMD universe are obtained. The asymptotic behaviour of the solutions is investigated. The asymptotic form of the metric near the initial singularity has a spatially varying Kasner form. The character of the space-time singularities is discussed. The late evolution of the solutions is described by a background homogeneous and anisotropic universe filled with weakly interacting gravitational, dilatonic and electromagnetic waves.
Cite
@article{arxiv.hep-th/0010156,
title = {Exact inhomogeneous Einstein-Maxwell-Dilaton cosmologies},
author = {Stoytcho Yazadjiev},
journal= {arXiv preprint arXiv:hep-th/0010156},
year = {2009}
}
Comments
10 pages, latex; v2: English corrected, new comments and reference added in section 1, acknowledgments added; v3: final version to be published in Phys. Rev. D