Bulk scalar field in DGP braneworld cosmology

Abstract

We investigated the effects of bulk scalar field in the braneworld cosmological scenario. The Friedmann equations and acceleration condition in the presence of the bulk scalar field for a zero tension brane and cosmological constant are studied. In the DGP model the effective Einstein equation on the brane is obtained with a 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 the present study of the DGP model, the late-time accelerating phase of the universe can be explained. © IOP Publishing Ltd.