Interaction between scalar field and ideal fluid with inhomogeneous equation of state

TL;DR

This paper investigates a cosmological model where a scalar field interacts with an inhomogeneous ideal fluid, analyzing energy densities and revealing a decaying scalar potential and interaction parameter, contributing to dark energy research.

Contribution

It introduces a new interaction model between scalar fields and inhomogeneous fluids with specific solutions for energy densities and potential decay behavior.

Findings

Scalar field potential decays over time.

Interaction parameter decreases with cosmic evolution.

Model supports dark energy explanation for cosmic acceleration.

Abstract

In this letter we study a model of interaction between the scalar field and an inhomogeneous ideal fluid. We have considered two forms of the ideal fluid and a power law expansion for the scale factor. We have solved the equations for the energy densities. Also we show that besides being a dark energy model to explain the cosmic acceleration, this model shows a decaying nature of the scalar field potential and the interaction parameter.