Soluções escalares em cosmologia de branas.

Abstract

In this work we use the first-order framework to get cosmological solutions in a braneworld scenario in which our quadridimensional Universe is considered like a 3-brane embedded in a five-dimensional bulk. We consider the case in which the cosmology is governed by a real scalar field. We show how we can use an analytic continuation to stablish a correspondence between brane-cosmology and domain-wall, which allow us to get solutions that can describe domain-wall in a simple and direct way. Finally, we contrast the corresponding desaceleration parameter role gotten by analytic continuation.