With the chiral susceptibility criterion we obtain the phase diagram ofstrong-interaction matter in terms of temperature and chemical potential in theframework of Dyson-Schwinger equations (DSEs) of QCD.After calculating thepressure and some other thermodynamic properties of the matter in the DSEmethod, we get the phase diagram in terms of temperature and baryon numberdensity. We also obtain the interface tension and the interface entropy densityto describe the inhomogeneity of the two phases in the coexistence region ofthe first order phase transition. After including the interface effect, we findthat the total entropy density of the system increases in both thedeconfinement (dynamical chiral symmetry restoration) and the hadronization(dynamical chiral symmetry breaking) processes of the first order phasetransitions and thus solve the entropy puzzle in the hadronization process.
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