Torsion gravity with non-minimally coupled fermionic field: some cosmological models

TL;DR

This paper explores cosmological models where a fermionic field non-minimally couples to gravity with torsion, addressing issues like singularities, inflation, and dark energy within Einstein-Cartan theory.

Contribution

It introduces new cosmological models incorporating non-minimal fermion-gravity coupling with torsion, analyzing their effects on key cosmological problems.

Findings

Non-minimal coupling influences cosmological singularity avoidance.

Torsion effects can drive inflationary behavior.

Models provide alternative explanations for dark energy.

Abstract

We investigate some cosmological models arising from a non-minimal coupling of a fermionic field to gravity in the geometrical setting of Einstein-Cartan-Sciama-Kibble gravity. The role played by the non-minimal coupling together with torsion in facing problems such as cosmological singularity, inflation and dark energy is discussed.