Thermodynamic aspects of entropic cosmology with viscosity

Abstract

We describe the evolution of the early and late universe from thermodynamic considerations, using the generalized non-extensive Tsallis entropy with a variable exponent. A new element in our analysis is the inclusion of a bulk viscosity in the description of the cosmic fluid. Using the generalized Friedmann equation, a description of the early and the late universe is obtained.

arXiv comment12 pages, no figures. To appear in Int. J. Mod. Phys. D

References in corpus (27)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Planck 2013 results. XVI. Cosmological parameters
• The Cosmological Constant and Dark Energy
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Thermodynamics of Spacetime: The Einstein Equation of State
• A Model of Holographic Dark Energy
• Modified Gauss-Bonnet theory as gravitational alternative for dark energy
• Properties of singularities in (phantom) dark energy universe
• Non-Gaussianity from Inflation: Theory and Observations
• Modified f(R) gravity consistent with realistic cosmology: from matter dominated epoch to dark energy universe
• Thermodynamical Aspects of Gravity: New insights
• Unifying phantom inflation with late-time acceleration: scalar phantom-non-phantom transition model and generalized holographic dark energy
• Quintom Cosmology: Theoretical implications and observations
• Interpretation of the nonextensitivity parameter $q$ in some applications of Tsallis statistics and Lévy distributions
• Black hole thermodynamical entropy
• Gravity and the Thermodynamics of Horizons
• Nonextensivity and multifractality in low-dimensional dissipative systems
• Observational constraints on dark energy with generalized equations of state
• Covariant Generalized Holographic Dark Energy and Accelerating Universe
• Modified cosmology from extended entropy with varying exponent
• Holographic inflation
• Unifying Holographic Inflation with Holographic Dark Energy: a Covariant Approach
• Entropic cosmology for a generalized black-hole entropy
• Modified cosmology through nonextensive horizon thermodynamics
• Correspondence of cosmology from non-extensive thermodynamics with fluids of generalized equation of state
• Inhomogeneous viscous dark fluid coupled with dark matter in the FRW universe

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