Aspectos da teoria da inflação com um campo taquiônico.

Abstract

In this thesis we address the issue of inflation driven by a tachyonic field. After a brief immersion in standard cosmological theory, we study aspects of inflationary theory and discover how a tachyon field can be used to expand the Universe primarily. In the midst of this expansion, the generation of perturbations of curvature and gravitational waves are related to the spectrum of the cosmic background radiation, obtained by the recent experiments. Further analysis of these perturbations lead us to consider quantum states and how they are affected by the measurement problem.