Braneworlds, Conformal Fields and Dark Energy

Abstract

In the Randall-Sundrum scenario we analize the dynamics of a spherically symmetric 3-brane when matter fields propagate in the bulk. For a well defined class of conformal fields of weight -4 we determine a new set of exact 5-dimensional solutions which localize gravity in the vicinity of the brane and are stable under radion field perturbations. Geometries which describe the dynamics of inhomogeneous dust, generalized dark radiation and homogeneous polytropic dark energy are shown to belong to this set.

7 pages, latex, no figures. Talk given at the Fifth International Workshop on New Worlds in Astroparticle Physics, University of Algarve, Faro, 8-10 January 2005. To be published in the workshop proceedings