Role of mesonic fluctuations in the Polyakov loop extended quark-meson model at imaginary chemical potential
Role of mesonic fluctuations in the Polyakov loop extended quark-meson model at imaginary chemical potential
复制标题
虚化学势下波利亚科夫环扩展夸克-介子模型中介子涨落的作用
DOI：
10.1103/physrevd.84.074020
复制
发表时间：
2011
影响因子：
5
通讯作者：
K. Redlich
中科院分区：
文献类型：
--
作者：
K. Morita;V. Skokov;B. Friman;K. Redlich
研究了在虚化学势下平均场近似之外的Polyakov环扩展双味手性夸克-介子（PQM）模型的热力学和相结构。我们的方法是基于功能重整化群（FRG）方法。在有限温度和虚化学势条件下，我们求解了在胶子背景场存在下尺度相关热力学势的重整化群流方程。我们确定了FRG方法中PQM模型阶参量的行为，并计算了相图。我们将FRG结果与虚化学势下的平均场近似结果进行了比较。
We explore the thermodynamics and phase structure of the Polyakov loop-extended two-flavor chiral quark-meson (PQM) model beyond the mean-field approximation at imaginary chemical potential. Our approach is based on the functional renormalization group (FRG) method. At finite temperature and imaginary chemical potential, we solve the renormalization group flow equation for a scale-dependent thermodynamic potential in the presence of the gluonic background field. We determine the behavior of the order parameters of the PQM model in the FRG approach and compute the phase diagram. We compare our FRG results with those obtained in the mean-field approximation at imaginary chemical potential.