General treatment for dark energy thermodynamics

Abstract

In this work we discuss a general approach for the dark energy thermodynamics considering a varying equation of state (EoS) parameter of the type $\omega (a)={\omega }_0+F(a)$ and taking into account the role of a non-zero chemical potential $\mu$. We derive generalized expressions for the entropy density, chemical potential and dark energy temperature $T$ and use the positiveness of the entropy to impose thermodynamic bounds on the EoS parameter $\omega (a)$. In particular, we find that a phantom-like behavior $\omega (a)<-1$ is allowed only when the chemical potential assumes negative values ($\mu <0$).

4 pages. 1 figure, LaTeX

References in corpus (4)

• A parametric model for dark energy
• Unified dark energy thermodynamics: varying w and the -1-crossing
• Chemical Potential and the Nature of the Dark Energy: The case of phantom
• On phantom thermodynamics with negative temperature

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