ANDRADE, R. M. F.; http://lattes.cnpq.br/9968563724645486; ANDRADE, Ronaldo Marcelino Felix de.
Resumo:
Scalar fields have a range of applications in various contexts, one of which is in condensed
matter with defects. These defects appear naturally through the presence of phase
transitions at the beginning of the universe. The type of defect, as well as its properties,
depends on the details of each symmetry break. In this dissertation we will use an
application of scalar fields linked to the cosmological scenario through the study of
quintessence, which involves gravity coupled scalar fields in order to describe a phase of
accelerated cosmic expansion, presenting itself as a promising alternative in the study of
cosmic inflation. of dark energy. Our interest is in analyzing first order formalism-based
cosmological solutions to find 1-field analytical models that describe the current phase of
expansion of the universe without the need for a sllow-rool approximation. The results
are obtained through analytical cosmological parameters that make the results acceptable
in relation to the experimental values. Through the mentioned procedures, we hope to
understand the process of expansion of the accelerated universe, emphasizing the fact that
Lorentz’s symmetry breaking parameter is indispensable for the proposed model.