Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration

Details Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration

2003-07-30

arxiv.org/abs/hep-th/0307288v4

Phys.Rev.D68:123512,2003

Physics

High Energy Physics

High Energy Physics - Theory

23 pages, 3 figures, discussion is extended, references added, version to appear in PRD

Scientific paper

10.1103/PhysRevD.68.123512

The modified gravity, which eliminates the need for dark energy and which seems to be stable, is considered. The terms with positive powers of the curvature support the inflationary epoch while the terms with negative powers of the curvature serve as effective dark energy, supporting current cosmic acceleration. The equivalent scalar-tensor gravity may be compatible with the simplest solar system experiments.

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