The 2-flavor Polyakov-loop extended model is generalized by taking intoaccount the effective four-quark vector-type interaction with the couplingstrengths, which are endowed with a dependence on the Polyakov field $\Phi$.The effective vertex generates entanglement interaction between the Polyakovloop and the chiral condensate. We investigate the influence of an additionalquark vector interaction and the entanglement interaction on the location ofthe critical end-point at the given chemical potential or quark density. It isshown that the finite value of the vector interaction strength $G_{\rm v}$improves the model agreement with the lattice data. The influence of thenon-zero $G_{\rm v}$ and entanglement on the thermodynamic observables and thecurvature of the crossover boundary in the $T-\mu$ plane is also examined.
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机译：通过考虑有效的四夸克矢量类型与耦合强度的相互作用，推广了2-味的Polyakov环扩展模型，这些相互作用依赖于Polyakov场$ \ Phi $。有效顶点在两个顶点之间产生纠缠相互作用。 Polyakovloop和手性冷凝物。我们研究了在给定化学势或夸克密度下，额外夸克矢量相互作用和纠缠相互作用对关键终点位置的影响。结果表明，矢量相互作用强度$ G _ {\ rm v} $的有限值改善了模型与晶格数据的一致性。还研究了非零的$ G _ {\ rm v} $和纠缠对$ T- \ mu $平面中热力学观测值和交叉边界曲率的影响。
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