Reconstruction and deceleration-acceleration transitions in modified gravity
High Energy Physics - Theory
2014-11-20 v3 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
We discuss the cosmological reconstruction in modified Gauss-Bonnet and F(R) gravities. Two alternative representations of the action (with and without auxiliary scalar) are considered. The approximate description of deceleration-acceleration transition cosmologies is reconstructed. It is shown that cosmological solution containing Big Bang and Big Rip singularities may be reconstructed only using the representation with the auxiliary field. The analytical description of the deceleration-acceleration transition cosmology in modified Gauss-Bonnet gravity is demonstrated to be impossible at sufficiently general conditions.
Keywords
Cite
@article{arxiv.0912.2488,
title = {Reconstruction and deceleration-acceleration transitions in modified gravity},
author = {Shin'ichi Nojiri and Sergei D. Odintsov and Alexey Toporensky and Petr Tretyakov},
journal= {arXiv preprint arXiv:0912.2488},
year = {2014}
}
Comments
LaTeX 8 pages, published version.