The main goal of this paper is deriving Density of states g(ϵ)
(degeneracy function) per volume for an equation of state (EOS) p=−ρ (we
called it dark energy(DE)).We have concluded that thermodynamic quantities such
as pressure and energy density are simple functions of temperature, fugacity,
curvature and mass of Bosons. Our work has been expressed the origin of some
claims about the negativity of the entropy for the scalar fields models of DE.Comment: 12 pages,Major revision,Typos fixed,References added,it has now been
accepted for publication in International Journal of Modern Physics E. It was
accepted on May 31, 201