Cyclic, ekpyrotic and little rip universe in modified gravity

Details Cyclic, ekpyrotic and little rip universe in modified gravity Cyclic, ekpyrotic and little rip universe in modified gravity

2011-08-03

arxiv.org/abs/1108.0767v2

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX 11 pages, no figure, typos corrected

Scientific paper

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

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