Finite-time future singularities in modified gravity

Details Finite-time future singularities in modified gravity Finite-time future singularities in modified gravity

2009-04-17

arxiv.org/abs/0904.2655v1

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, no figure, published in The Casimir Effect and Cosmology, Tomsk State Pedagogical University 2008, p. 142-152

Scientific paper

We review finite-time future singularities in modified gravity. We reconstruct an explicit model of modified gravity realizing a crossing of the phantom divide and show that the Big Rip singularity appears in the modified gravitational theory. It is also demonstrated that the (finite-time) Big Rip singularity in the modified gravity is transformed into the infinite-time singularity in the corresponding scalar field theory obtained through the conformal transformation. Furthermore, we study several models of modified gravity which produce accelerating cosmologies ending at the finite-time future singularities of all four known types.

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