# Universe consisting of diffusive dark fluids: thermodynamics and stability analysis

## TL;DR

This paper investigates the thermodynamics and stability of a universe modeled with non-interacting diffusive cosmic fluids, analyzing how diffusion affects stability conditions and the universe's evolution.

## Contribution

It introduces a thermodynamic stability analysis for diffusive cosmic fluids within the FLRW universe, deriving new stability conditions based on the equation of state.

## Key findings

- Stability conditions depend on the equation of state parameter.
- Diffusive nature influences thermodynamic stability.
- Constraints on cosmic fluid parameters are established.

## Abstract

The present work deals with homogeneous and isotropic FLRW model of the Universe having a system of non-interacting diffusive cosmic fluids with barotropic equation of state (constant or variable equation of state parameter). Due to diffusive nature of the cosmic fluids, the divergence of the energy momentum tensor is chosen to be proportional to the diffusive current. The thermodynamic stability analysis of individual fluids is done and the stability conditions are expressed as restrictions on the equation of state parameter.