Interface Effect in QCD Phase Transitions via Dyson-Schwinger Equation Approach
Interface Effect in QCD Phase Transitions via Dyson-Schwinger Equation Approach
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通过 Dyson-Schwinger 方程方法研究 QCD 相变中的界面效应
DOI：
10.1103/physrevd.94.094030
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发表时间：
2016-09
影响因子：
5
通讯作者：
Liu Yu xin
中科院分区：
文献类型：
--
作者：
Gao Fei;Liu Yu xin
利用手征磁化率判据，我们得到了QCD Dyson-Schwinger方程框架下强相互作用物质的温度和化学势的相图。在Dyson-Schwinger方法中计算了物质的压强和其他热力学性质后，我们得到了以温度和重子数密度表示的相图。我们还得到了描述一级相变共存区域内两相不均匀的界面张力和界面熵密度。在计入界面效应后，我们发现在一阶相变的退禁闭(动力学手征对称性恢复)和强子化(动力学手征对称性破缺)过程中，系统的总熵密度都增加，从而解决了强子化过程中的熵难题。
With the chiral susceptibility criterion, we obtain the phase diagram of strong-interaction matter in terms of temperature and chemical potential in the framework of Dyson-Schwinger equations of QCD. After calculating the pressure and some other thermodynamic properties of the matter in the Dyson-Schwinger method, we get the phase diagram in terms of temperature and baryon number density. We also obtain the interface tension and the interface entropy density to describe the inhomogeneity of the two phases in the coexistence region of the first-order phase transition. After including the interface effect, we find that the total entropy density of the system increases in both the deconfinement (dynamical chiral symmetry restoration) and the hadronization (dynamical chiral symmetry breaking) processes of the first-order phase transitions and thus solve the entropy puzzle in the hadronization process.