G-essence with Yukawa Interactions

TL;DR

This paper investigates a g-essence cosmological model with Yukawa interactions, deriving exact solutions and potential reconstructions, linking it to unified dark energy and dark matter models like Chaplygin gas.

Contribution

It introduces a novel g-essence model with Yukawa interactions, providing exact solutions and potential reconstructions, and connects it to unified dark energy-dark matter models.

Findings

Exact solutions for the g-essence model with Yukawa interactions

Reconstructed scalar and fermionic potentials for the model

Linking g-essence models to Chaplygin gas and Dirac-Born-Infeld models

Abstract

We study the g-essence model with Yukawa interactions between a scalar field $\phi$ and a Dirac field $\psi$. For the homogeneous, isotropic and flat Friedmann-Robertson-Walker universe filled with the such g-essence, the exact solution of the model is found. Moreover, we reconstruct the corresponding scalar and fermionic potentials which describe the coupled dynamics of the scalar and fermionic fields. It is shown that some particular g-essence models with Yukawa interactions correspond to the usual and generalized Chaplygin gas unified models of dark energy and dark matter. Also we present some scalar-fermionic Dirac-Born-Infeld models corresponding g-essence models with Yukawa interactions which again describe the unified dark energy-dark matter system.