A causal model for a closed universe

TL;DR

This paper develops a causal thermodynamic model of a closed universe with viscous and quintessence matter, showing it can mimic an accelerated flat universe at low redshift and includes entropy production through dissipative inflation.

Contribution

It introduces a causal thermodynamics framework for dissipative processes in a closed universe with viscous and quintessence components, linking to accelerated expansion.

Findings

Universe can resemble an accelerated flat FRW universe at low redshift

Dissipative processes produce entropy via causal dissipative inflation

Model supports a closed universe with realistic thermodynamics

Abstract

We study a closed model of a universe filled with viscous fluid and quintessence matter components. The dynamical equations imply that the universe might look like an accelerated flat Friedmann-Robertson-Walker (FRW) universe at low redshift. We consider here dissipative processes which obey a causal thermodynamics. Here, we account for the entropy production via causal dissipative inflation.