Thermodynamics of the dissipative cosmic fluid and stability criteria
Pritikana Bhandari, Sourav Haldar, Subenoy Chakraborty
TL;DR
This paper explores the thermodynamics of a dissipative cosmic fluid, focusing on stability criteria for thermal equilibrium in an expanding universe with bulk viscosity and particle creation.
Contribution
It introduces stability analysis for thermal equilibrium in a dissipative, particle-creating universe model, linking thermodynamics with cosmological dynamics.
Findings
Stability conditions depend on particle creation parameters.
Thermal equilibrium stability varies with the equation of state.
Tabular results illustrate parameter restrictions for stability.
Abstract
The work deals with the thermodynamical aspects of the cosmic substratum which is dissipative in nature. For homogeneous and isotropic model of the Universe this dissipative phenomenon is effective bulk viscous pressure in nature and is related to the particle creation mechanism. Finally, the stability criteria for the thermal equilibrium has been analyzed and are presented in tabular form restricting the particle creation parameter or the variation of the equation of state parameter with the volume.
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