English

Cyclic, ekpyrotic and little rip universe in modified gravity

High Energy Physics - Theory 2015-05-30 v2 Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology

Abstract

We propose the reconstruction of F(R)F(R) gravity in such a way that corresponding theory admits cyclic and ekpyrotic universe solutions. The number of explicit examples of such F(R)F(R) model is found. The comparison with the reconstructed scalar-tensor theory is made. We also present F(R)F(R) gravity which provides the little rip evolution and gives the realistic gravitational alternative for Λ\LambdaCDM cosmology. The time for little rip dissolution of bound structures in such theory is estimated. We demonstrate that transformed little rip F(R)F(R) solution becomes qualitatively different cosmological solution with Big Bang type singularity in Einstein frame.

Keywords

Cite

@article{arxiv.1108.0767,
  title  = {Cyclic, ekpyrotic and little rip universe in modified gravity},
  author = {Shin'ichi Nojiri and Sergei D. Odintsov and Diego Saez-Gomez},
  journal= {arXiv preprint arXiv:1108.0767},
  year   = {2015}
}

Comments

LaTeX 11 pages, no figure, typos corrected

R2 v1 2026-06-21T18:45:48.173Z