Viscous dark energy and generalized second law of thermodynamics

Abstract

We examine the validity of the generalized second law of thermodynamics in a non-flat universe in the presence of viscous dark energy. At first we assume that the universe filled only with viscous dark energy. Then, we extend our study to the case where there is an interaction between viscous dark energy and pressureless dark matter. We examine the time evolution of the total entropy, including the entropy associated with the apparent horizon and the entropy of the viscous dark energy inside the apparent horizon. Our study show that the generalized second law of thermodynamics is always protected in a universe filled with interacting viscous dark energy and dark matter in a region enclosed by the apparent horizon. Finally, we show that the the generalized second law of thermodynamics is fulfilled for a universe filled with interacting viscous dark energy and dark matter in the sense that we take into account the Casimir effect.

12 pages

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Cited by in corpus (12)

• Viscous Cosmology for Early- and Late-Time Universe
• Friedmann model with viscous cosmology in modified $f(R,T)$ gravity theory
• Generalized Second Law of Thermodynamics in $f(T)$ Gravity with Entropy Corrections
• Late-Time Viscous Cosmology in $f(R,T)$ Gravity
• Crossing the phantom divide with dissipative normal matter in the Israel-Stewart-Hiscock formalism
• Viscous cosmology in $f(T)$ gravity
• Phantom Instability of Viscous Dark Energy in Anisotropic Space-Time
• Bulk viscous matter in $f(T)$ gravity: A path to cosmic acceleration
• No stable dissipative phantom scenario in the framework of a complete cosmological dynamics
• A comprehensive analysis of Barrow holographic Chaplygin gas model reconstruction and its cosmological consequences
• Thermodynamical aspects of modified holographic dark energy model
• Late time cosmological solutions in $f(R,T)$ gravity in a viscous Universe