English

$\Lambda$CDM Bounce Cosmology without $\Lambda$CDM: the case of modified gravity

General Relativity and Quantum Cosmology 2015-06-23 v1 Cosmology and Nongalactic Astrophysics High Energy Physics - Theory

Abstract

We provide an F(R)F(R) gravity description of a Λ\LambdaCDM bouncing model, without the need for matter fluids or for cosmological constant. As we explicitly demonstrate, the two cosmological eras that constitute the Λ\LambdaCDM bouncing model, can be generated by F(R)F(R) gravity which can lead to accelerating cosmologies. The resulting F(R) gravity has Einstein frame inflationary properties that have concordance to the latest Planck observational data. Both the F(R)F(R) gravity stability properties are thoroughly investigated and also, the gravitational particle production, a feature necessary for the viability of the Λ\LambdaCDM bounce scenario, is also addressed. As we will show, the Λ\LambdaCDM bounce model can be successfully described by pure F(R)F(R) gravity, with appealing phenomenological attributes, which we extensively discuss.

Keywords

Cite

@article{arxiv.1502.06125,
  title  = {$\Lambda$CDM Bounce Cosmology without $\Lambda$CDM: the case of modified gravity},
  author = {S. D. Odintsov and V. K. Oikonomou},
  journal= {arXiv preprint arXiv:1502.06125},
  year   = {2015}
}

Comments

31 pages, accepted by PRD

R2 v1 2026-06-22T08:34:38.460Z