Kaluza-Klein brane cosmology with a bulk scalar field

Abstract

The brane-world cosmological model in higher-dimensional spacetime with a bulk scalar field is investigated. We derive the $(4+n)$-dimensional gravitational field equations for the scalar field on the $(3+n)$-brane in a $(5+n)$-dimensional bulk with Einstein gravity plus a self-interacting scalar field. The $(4+n)$-dimensional gravitational field equations can be formulated to standard form with the extra component. Using this formalism we study the Kaluza-Klein brane cosmology. We derive the Friedmann equation and a possible energy leak out of the brane into the bulk. We present some exact solutions corresponding to vacuum brane and matter on the brane.

11 pages, one section added, accepted for publication in PRD

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• Variable $G$ Correction for Dark Energy Model in Higher Dimensional Cosmology
• Effect of the Chameleon Scalar Field on Brane Cosmological Evolution
• Nonlinear matter terms in general scalar-tensor braneworld cosmology