Non-singular solutions in multidimensional cosmology with a perfect fluid: acceleration and variation of G
High Energy Physics - Theory
2008-11-26 v2 Astrophysics
General Relativity and Quantum Cosmology
Abstract
Exact solutions with an exponential behaviour of the scale factors are considered in a multidimensional cosmological model describing the dynamics of n+1 Ricci-flat factor spaces M_i in the presence of a one-component perfect fluid. The pressures in all spaces are proportional to the density: p_i = w_i \rho, i = 0,...,n. Solutions with accelerated expansion of our 3-space M_0 and a small enough variation of the gravitational constant G are found. These solutions exist for two branches of the parameter w_0. The first branch describes superstiff matter with w_0 > 1, the second one may contain phantom matter with w_0 < - 1.
Keywords
Cite
@article{arxiv.hep-th/0612264,
title = {Non-singular solutions in multidimensional cosmology with a perfect fluid: acceleration and variation of G},
author = {V. D. Ivashchuk and S. A. Kononogov and V. N. Melnikov and M. Novello},
journal= {arXiv preprint arXiv:hep-th/0612264},
year = {2008}
}
Comments
6 pages, Latex, G&C style, few typos corrected