Fermions in a Walecka-type cosmology

Abstract

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.

8 pages, 4 figures. To appear in EPL

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• Spinor fields in $f(\mathcal{Q})$-gravity
• Isotropization in Bianchi type-I cosmological model with fermions and bosons interacting via Yukawa potential
• Fermionic Tachyons as a Source of Dark Energy
• Exit from accelerated regimes by symmetry breaking in a universe filled with fermionic and bosonic sources