General treatment for dark energy thermodynamics

الأصل · EN

In this work we discuss a general approach for the dark energy thermodynamics considering a varying equation of state (EoS) parameter of the type ω(a)=ω₀+F(a) and taking into account the role of a non-zero chemical potential μ. 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 ω(a). In particular, we find that a phantom-like behavior ω(a)< -1 is allowed only when the chemical potential assumes negative values (μ<0).