Quark mass density- and temperature-dependent model for bulk strange quark matter

It is shown that the quark mass density-dependent model cannot be used to explain the process of the quark deconfinement phase transition because the quark confinement is permanent in this model. A quark mass density- and temperature-dependent model in which the quark confinement is not permanent has been suggested. We argue that the vacuum energy density B is a function of the temperature and satisfies ${B=B}_0\left[1-{(T/T}_c{)}^2\right],$ where $T_c$ is the critical temperature of quark deconfinement. The dynamical and thermodynamical properties of bulk strange quark matter for quark mass density- and temperature-dependent model are discussed.