English

Variety of cosmic acceleration models from massive $F(R)$ bigravity

High Energy Physics - Theory 2015-06-12 v4 Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology

Abstract

We study the accelerating cosmology in massive F(R)F(R) 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 gg metric while the corresponding solution of the universe described by the reference ff metric is also found. It is demonstrated that in general the cosmological singularities of gg metric are not always manifested as cosmological singularities of the reference ff 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 gg and ff coincide with each other, which may indicate the connection with the convenient single metric background formulation. For another solution, where two metrics gg and ff 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