Phantom-Like Behavior of a DGP-Inspired Scalar-Gauss-Bonnet Gravity

Details Phantom-Like Behavior of a DGP-Inspired Scalar-Gauss-Bonnet Gravity Phantom-Like Behavior of a DGP-Inspired Scalar-Gauss-Bonnet Gravity

2009-10-04

arxiv.org/abs/0910.0611v2

JCAP 0910:022,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

20 pages, revised version, typos fixed, new references, to appear in JCAP

Scientific paper

10.1088/1475-7516/2009/10/022

We study the phantom-like behavior of a DGP-inspired braneworld scenario where curvature correction on the brane is taken into account. We include a possible modification of the induced gravity on the brane by incorporating higher order curvature terms of Gauss-Bonnet type. We investigate the cosmological implications of the model and we show that the normal branch of the scenario self-accelerates in this modified scenario without introducing any dark energy component. Also, a phantom-like behavior can be realized in this model without introducing any phantom field that suffers from serious difficulties such as violation of the null energy condition.

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