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arxiv: 1108.0767 · v2 · pith:VWUPATXKnew · submitted 2011-08-03 · ✦ hep-th · astro-ph.CO· gr-qc

Cyclic, ekpyrotic and little rip universe in modified gravity

classification ✦ hep-th astro-ph.COgr-qc
keywords littlegravitytheorycyclicekpyroticsolutionuniverseadmits
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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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