Brane-bulk energy exchange : a model with the present universe as a global attractor
High Energy Physics - Theory
2009-11-11 v2 Astrophysics
General Relativity and Quantum Cosmology
Abstract
The role of brane-bulk energy exchange and of an induced gravity term on a single braneworld of negative tension and vanishing effective cosmological constant is studied. It is shown that for the physically interesting cases of dust and radiation a unique global attractor which can realize our present universe (accelerating and 0<Omega_{m0}<1) exists for a wide range of the parameters of the model. For Omega_{m0}=0.3, independently of the other parameters, the model predicts that the equation of state for the dark energy today is w_{DE,0}=-1.4, while Omega_{m0}=0.03 leads to w_{DE,0}=-1.03. In addition, during its evolution, w_{DE} crosses the w_{DE}=-1 line to smaller values.
Keywords
Cite
@article{arxiv.hep-th/0510207,
title = {Brane-bulk energy exchange : a model with the present universe as a global attractor},
author = {G. Kofinas and G. Panotopoulos and T. N. Tomaras},
journal= {arXiv preprint arXiv:hep-th/0510207},
year = {2009}
}
Comments
8 pages, 2 figures, RevTex; references added, to appear in JHEP