Bulk scalar field in DGP braneworld cosmology

Details Bulk scalar field in DGP braneworld cosmology Bulk scalar field in DGP braneworld cosmology

2007-09-20

arxiv.org/abs/0709.3136v1

JCAP 0709:021,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, to appear in JCAP

Scientific paper

10.1088/1475-7516/2007/09/021

We investigated the effects of bulk scalar field in the braneworld cosmological scenario. The Friedmann equations and acceleration condition in presence of the bulk scalar field for a zero tension brane and cosmological constant are studied. In DGP model the effective Einstein equation on the brane is obtained with bulk scalar field. The rescaled bulk scalar field on the brane in the DGP model behaves as an effective four dimensional field, thus standard type cosmology is recovered. In present study of the DGP model, the late-time accelerating phase of the universe can be explained .

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