A Cosmological Model with Fermionic Field

Abstract

In this work, a cosmological model inspired by string/M- theory with fermionic field is taken into consideration. Here it is investigated whether the introduction of a non-Dirac fermionic field--characterized by an \textit{interaction term}--affects the cosmological evolution. The self-interaction potential is considered as a combination of the scalar and pseudo-scalar invariants. It is observed that the fermionic field under consideration behaves like an inflation field for the early Universe and later on, as a dark energy field. The late time acceleration becomes more prominent by the addition of the interaction term. There is a slight decrease for the inflation peak as well as for the energy density. We see that addition of higher order terms to the fermionic part of Lagrangian does not significantly change either the inflation or the late time acceleration behavior.

arXiv comment12 Pages, 7 Figures

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

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• Reconstruction of f-essence and fermionic Chaplygin gas models of dark energy
• Analysis cosmological tachyon and fermion model and observation data constraints
• Accelerated expansion of the Universe driven by G-essence
• Space-time evolution induced by spinor fields with canonical and non-canonical kinetic terms
• Fermionic wave functions and Grassmann fields as possible sources of dark energy
• Exploring Weak measurements within the Einstein-Dirac Cosmological framework