Brane-world inflation without inflaton on the brane

Citations Over TimeTop 10% of 2001 papers

Abstract

Inspired by the Randall-Sundrum brane-world scenario, we investigate the possibility of brane-world inflation driven not by an inflaton field on the brane, but by a bulk, dilaton-like gravitational field. As a toy model for the dilaton-like gravitational field, we consider a minimally coupled massive scalar field in the bulk five-dimensional space-time, and look for a perturbative solution in the anti--de Sitter (AdS) background. For an adequate range of the scalar field mass, we find a unique solution that has a nontrivial dependence on the fifth dimensional coordinate, and that induces slow-roll inflation on the brane.

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