Induced gravity with a non-minimally coupled scalar field on the brane

Details Induced gravity with a non-minimally coupled scalar field on the brane Induced gravity with a non-minimally coupled scalar field on the brane

2004-08-08

arxiv.org/abs/hep-th/0408061v1

Phys.Rev. D71 (2005) 024010

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, latex with revtex

Scientific paper

10.1103/PhysRevD.71.024010

We present the four-dimensional equations on a brane with a scalar field non-minimally coupled to the induced Ricci curvature, embedded in a five-dimensional bulk with a cosmological constant. This is a natural extension to a brane-world context of scalar-tensor (Brans-Dicke) gravity. In particular we consider the cosmological evolution of a homogeneous and isotropic (FRW) brane. We identify low-energy and strong-coupling limits in which we recover effectively four-dimensional evolution. We find de Sitter brane solutions with both constant and evolving scalar field. We also consider the special case of a conformally coupled scalar field for which it is possible (when the conformal energy density exactly cancels the effect of the bulk black hole) to recover a conventional four-dimensional Friedmann equation for all energy densities.

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