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On the Stability of Randall-Sundrum Braneworlds with Conformal Bulk Fields

Research paper by Rui Neves

Indexed on: 03 Sep '04Published on: 03 Sep '04Published in: High Energy Physics - Theory



Abstract

In the Randall-Sundrum scenario we consider exact 5-dimensional solutions with localized gravity which are associated with a well defined class of conformal bulk fields. We analyze their behaviour under radion field perturbations. We show that if the Randall-Sundrum exponential warp is the localizing metric function and the equation of state of the conformal fields is not changed by the radion perturbation then the 5-dimensional solutions are unstable. We present new stable solutions which describe on the brane the dynamics of inhomogeneous dust, generalized dark radiation and homogeneous polytopic matter.