Gravity on the Bloch Brane

Abstract

Bloch branes were introduced previously and are constructed in a system described by two real scalar fields coupled with gravity in (4, 1) dimensions in warped spacetime involving one extra dimension. This work investigates gravity on such thick branes with internal structure and focuses on the effects of massive graviton modes localization on the brane and to what extent they might reproduce the 4d gravity at a scale before escaping into the extra dimension. In this way gravitational measurements on the brane could reveal the existence of the extra dimension on some scales, with possible applications on brane cosmology.