Finite-time singularities in modified $\mathcal{F}(R,G)$-gravity and singularity avoidance

Details Finite-time singularities in modified $\mathcal{F}(R,G)$-gravity and singularity avoidance Finite-time singularities in modified $\mathcal{F}(R,G)$-gravity and singularity avoidance

2010-08-18

arxiv.org/abs/1008.3041v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, submitted to the volume "Cosmology, Quantum Vacuum, and Zeta Functions", in honour of Professor Emilio Elizalde on t

Scientific paper

We study finite-time future singularities in $\mathcal{F}(R,G)$-gravity, where $R$ and $G$ are the Ricci scalar and the Gauss-Bonnet invariant, respectively. In particular, we reconstruct the $F(G)$-gravity and $\mathcal{F}(R,G)$-gravity models realizing the finite-time future singularities. We discuss a possible way to cure the finite-time future singularities in $\mathcal{F}(R,G)$-gravity by taking into account higher-order curvature corrections or effects of viscous fluids.

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