Equation of state in the PNJL model with the entanglement interaction
Equation of state in the PNJL model with the entanglement interaction
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DOI：
10.1088/0954-3899/39/3/035004
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发表时间：
2011-04
期刊：
影响因子：
--
通讯作者：
Y. Sakai;T. Sasaki;H. Kouno;M. Yahiro
中科院分区：
文献类型：
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作者：
Y. Sakai;T. Sasaki;H. Kouno;M. Yahiro
本文用Polyakov圈扩展的Nambu？Jona-Lasinio（PNJL）模型，在手征凝聚体和Polyakov环之间具有纠缠顶点。纠缠PNJL（EPNJL）模型再现格点QCD（LQCD）数据？? 0优于PNJL模型。强子的自由度考虑到自由强子气体近似的体积排斥效应，由于强子的产生。强子的自由度提高了EPNJL模型与LQCD数据的一致性，特别是在低温下。即使手征凝聚体和波利亚科夫圈之间的相关性很强，并且考虑到强子的自由度，夸克相仍然存在。然而，夸克相的位置对体积不相容的强度很敏感。
The equation of state and the phase diagram in two-flavor quantum chromodynamics (QCD) are investigated by the Polyakov-loop extended Nambu?Jona-Lasinio (PNJL) model with an entanglement vertex between the chiral condensate and the Polyakov loop. The entanglement-PNJL (EPNJL) model reproduces lattice QCD (LQCD) data at ? ? 0 better than the PNJL model. Hadronic degrees of freedom are taken into account by the free-hadron-gas approximation with the volume-exclusion effect due to the hadron generation. The hadron degrees of freedom improve agreement of the EPNJL model with LQCD data particularly at low temperature. The quarkyonic phase survives, even if the correlation between the chiral condensate and the Polyakov loop is strong and hadron degrees of freedom are taken into account. However, the location of the quarkyonic phase is sensitive to the strength of the volume exclusion.