A New Variable Modified Chaplygin Gas Model Interacting with Scalar Field

TL;DR

This paper introduces a modified Chaplygin gas model with inhomogeneous equation of state that explains crossing of the dark energy equation of state parameter and explores its interaction with scalar fields, including potential decay over time.

Contribution

It proposes a new inhomogeneous Chaplygin gas model that accounts for $ ext{w}=-1$ crossing and studies its interaction with scalar fields using a phenomenological coupling.

Findings

Model explains $ ext{w}=-1$ crossing behavior.

Graphical representation using $ ext{r-s}$ parameters.

Potential of the scalar field decays with time.

Abstract

In this letter we present a new form of the well known Chaplygin gas model by introducing inhomogeneity in the EOS. This model explains $\omega=-1$ crossing. Also we have given a graphical representation of the model using $\{r,s\}$ parameters. We have also considered an interaction of this model with the scalar field by introducing a phenomenological coupling function and have shown that the potential decays with time.