f(G) modified gravity and the energy conditions
Abstract
Motivated by string/M-theory predictions that scalar field couplings with the Gauss-Bonnet invariant, G, are essential in the appearance of non-singular early time cosmologies, we discuss the viability of an interesting alternative gravitational theory, namely, modified Gauss-Bonnet gravity, and present the viability bounds arising from the energy conditions. In particular, we consider a specific realistic form of f(G) analyzed in the literature that accounts for the late-time cosmic acceleration and that has been found to cure the finite-time future singularities present in the dark energy models, and further examine the respective viability of the specific f(G) model imposed by the weak energy condition.
Keywords
Cite
@article{arxiv.1012.0953,
title = {f(G) modified gravity and the energy conditions},
author = {Nadiezhda Montelongo García and Tiberiu Harko and Francisco S. N. Lobo and José P. Mimoso},
journal= {arXiv preprint arXiv:1012.0953},
year = {2015}
}
Comments
4 pages. Prepared for the proceedings of the Spanish Relativity meeting (ERE2010), Granada, Spain, 6-10 Sep 2010