Variety of cosmic acceleration models from massive $F(R)$ bigravity
Abstract
We study the accelerating cosmology in massive bigravity via the reconstruction scheme. The consistent solution of the FRW equations is presented: it includes Big and Little Rip, quintessence, de Sitter and decelerating universes described by the physical metric while the corresponding solution of the universe described by the reference metric is also found. It is demonstrated that in general the cosmological singularities of metric are not always manifested as cosmological singularities of the reference metric. We give two consistent ways to describe the Big and Little Rip, quintessence, de Sitter and decelerating universes. In one of the consistent solutions, the two metrics and coincide with each other, which may indicate the connection with the convenient single metric background formulation. For another solution, where two metrics and do not coincide with each other, here always appears super-luminal mode.
Keywords
Cite
@article{arxiv.1212.2079,
title = {Variety of cosmic acceleration models from massive $F(R)$ bigravity},
author = {Shin'ichi Nojiri and Sergei D. Odintsov and Norihito Shirai},
journal= {arXiv preprint arXiv:1212.2079},
year = {2015}
}
Comments
LaTeX 13 pages, no figure, published in JCAP