Cosmological Models Coupled with Dark Matter in a Dissipative Universe

TL;DR

This paper explores cosmological models with interacting dark energy and dark matter in a dissipative universe, providing analytic solutions for various universe evolution scenarios and analyzing energy density corrections due to dissipation.

Contribution

It introduces analytic models of dissipative universe cosmologies with coupled dark energy and dark matter, including Little Rip, Pseudo Rip, and bounce scenarios, with detailed thermodynamic analysis.

Findings

Analytic solutions for Little Rip, Pseudo Rip, and bounce cosmologies with dissipation.

Corrections to dark matter energy density due to dissipative processes.

Impact of coupling between dark energy and dark matter on universe evolution.

Abstract

We consider the cosmological system with two interacting fluids: dark energy and dark matter, in a homogeneous and isotropic universe with dissipation. The modified gravitational equation for dark matter is solved. The analytic representations for the Little Rip, the Pseudo Rip, and the bounce cosmology models with dissipation are obtained in terms of the thermodynamic parameters in the equation of state. We analyze the corrections in the energy density for dark matter, in view of the dissipative processes and the coupling with dark energy.