Localização de gravidade e defeitos em Branas.

Abstract

In This study we analyzes the gravity uctuations in a topological defect, domain wall type, coupled to a four-dimensional gravity on a 3-brane in Minkowski space (M4) or anti de Sitter (AdS4). Introduced the concept of extra dimensions, in which we approach the model of extra dimensions Randall-Sundrum, whose model describes gravity in ve dimensions in the presence of dynamic scalar elds in a bulk. After we make a correspondence between brane cosmology and domain walls by using the formalism of the rst order and the analytic continuation process. Then investigated the fluctuations of gravity on the metric that represents solutions in two-dimensional at domain walls within asymptotically in Minkowski space (M4) or anti de Sitter (AdS4) and from the linearization of gravity then we obtain the gravitational potential on the domain wall in the 3����� brane, which describes a potential type Schr odinger. Finally, we determine the zero mode of the equation Schr odinger, the which provides Newtonian gravity in four-dimensional.