Marlos O. Ribas, Pedro Zambianchi Jr., Fernando P. Devecchi, Gilberto M. Kremer
A simplified Walecka-type model is investigated in a cosmological scenario.
The model includes fermionic, scalar and vector fields as sources. It is shown
that their interactions, taking place in a Robertson-Walker metric, could be
responsible for the transition of accelerated-decelerated periods in the early
universe and a current accelerated regime. It is also discussed the role of the
fermionic field as the promoter of the accelerated regimes in the early and the
late stages of the universe.
View original:
http://arxiv.org/abs/1201.2901
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