A Cosmological Model with Fermionic Field and Gauss-Bonnet Term

Abstract

In this work, a cosmological model inspired by string theory with Gauss-Bonnet term coupled to the fermionic field is taken into consideration. The self-interaction potential is considered as a combination of the scalar and pseudo-scalar invariants. Here the cosmological contribution of the coupling of Gauss-Bonnet term with a non-Dirac fermionic field--characterized by an \textit{interaction term}$L_{DG}^2$-- is investigated. It is observed that the new type of coupling plays a significant role in the accelerating behavior of the universe. Specifically, in addition to the late time acceleration for the universe, $L_{DG}^2$ produces an early decelerating behavior. The behavior of the equation-of-state parameter $(w)$ is such that it guarantees the stability of the theory.

arXiv comment12 pages, 9 figures, Submitted to IJMP-A

References in corpus (5)

• Gauss-Bonnet dark energy
• Fermions as sources of accelerated regimes in cosmology
• Cosmological models described by a mixture of van der Waals fluid and dark energy
• Irreversible Processes in a Universe modelled as a mixture of a Chaplygin gas and radiation
• Irreversible Processes in Inflationary Cosmological Models

Cited by in corpus (9)

• Teleparallel dark energy model with a fermionic field via Noether symmetry
• Modified Chaplygin Gas and Solvable F-essence Cosmologies
• Fermionic cosmologies with Yukawa type interactions
• G-essence with Yukawa Interactions
• Torsion gravity with non-minimally coupled fermionic field: some cosmological models
• Non minimally coupled condensate cosmologies: a phase space analysis
• Spinor fields in $f(\mathcal{Q})$-gravity
• Space-time evolution induced by spinor fields with canonical and non-canonical kinetic terms
• Accelerating and decelerating cosmology from spinor and scalar fields non-minimally coupled with f(R) gravity