Modelos cosmológicos analíticos via ínflatons assimétricos.

Abstract

Analytic solutions associated with nonlinear differential equations are present in the context of classical field theory. In this dissertation, we made a review covering the main concepts on one dimensional defect like solutions known as Kink, and Lump. During our investigation, we determine the equations of motion related with such defects, and we also used the so-called first-order to find analytic defect-like solutions. We then applied these solutions in standard cosmology and we discovered scenarios which are compatible with the different phases of evolution our Universe passed through. In this work, we carried out a study on cosmological scenarios, in order to describe the current phase of expansion of the Universe, based on hybrid models, built with asymmetric inflatons.