A dinâmica inflacionária no universo Rainbow.

Abstract

In this work we present a brief introduction to the Standard Cosmological Model (MCP). This model provides the best current explanation for the formation of structures in large scale, as well as observed cosmological dynamics, however, it does not give us information about the nature of dark matter and dark energy. So the description and Understanding these quantities emerges as one of the great challenges for Cosmology. We assume the current scenario of Cosmology, which through Hubble’s discoveries and other observations, considers a universe in accelerated expansion. We deduce Friedmann’s equations, which are fundamental for modeling the universe. We deal with the cosmological model that involves the scalar inflaton field that depends only on time (t), which allows the reproduction of an accelerated cosmic expansion phase and, therefore, presents itself as a promising alternative in the study of cosmic inflation and dark energy. This work investigated a dynamic model, where rainbow gravity appears as an alternative context capable of meeting the needs of the inflation paradigm. It modifies some aspects of General Relativity by introducing rainbow functions that depend on the red shift z factor. We derive the modified Friedmann equations. Finally, we must consider a cosmological scenario with an inflaton field on the effect of the rainbow functions which constitutes a background field in terms of the redshift factor.