Cosmological dynamics of a non-minimally coupled bulk scalar field in DGP setup
General Relativity and Quantum Cosmology
2015-06-17 v1
Abstract
We consider cosmological dynamics of a canonical bulk scalar field, which is coupled non-minimally to 5-dimensional Ricci scalar in a DGP setup. We show that presence of this non-minimally coupled bulk scalar field affects the jump conditions of the original DGP model significantly. Within a superpotential approach, we perform some numerical analysis of the model parameter space and consider bulk-brane energy exchange in this setup. Also we show that the normal, ghost-free branch of the DGP solutions in this case has the potential to realize a self-consistent phantom-like behavior and therefore explains late time acceleration of the universe in a consistent way.
Keywords
Cite
@article{arxiv.1308.5772,
title = {Cosmological dynamics of a non-minimally coupled bulk scalar field in DGP setup},
author = {Kourosh Nozari and Narges Rashidi},
journal= {arXiv preprint arXiv:1308.5772},
year = {2015}
}
Comments
25 pages, Accepted for publication in Astrophyics and Space Science