Study of QCD Thermodynamics at Finite Density by Taylor Expansion

Study of QCD Thermodynamics at Finite Density by Taylor Expansion
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泰勒展开式有限密度QCD热力学研究

DOI：
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发表时间：
2003
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通讯作者：
C. Schmidt
C. Schmidt
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文献类型：
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作者：
S. Ejiri;C. Allton;Simon Hands;O. Kaczmarek;F. Karsch;E. Laermann;C. Schmidt

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讨论了非零温度和非零密度下QCD的相结构和态方程。对于2味QCD，我们计算了$ln Z$对夸克化学势$mu_q$的四阶导数，通过泰勒级数展开，可以估计压强、夸克数密度和相关的磁化率作为$mu_q$的函数。在低密度条件下，研究了2味和3味QCD的相变线和$(T, mu_q)$平面的临界端点。
We discuss the phase structure and the equation of state for QCD at non-zero temperature and density. Derivatives of $ln Z$ with respect to quark chemical potential $mu_q$ up to fourth order are calculated for 2-flavor QCD, enabling estimates of the pressure, quark number density and associated susceptibilities as functions of $mu_q$ via a Taylor series expansion. Also, the phase transition line for 2 and 3-flavor QCD and the critical endpoint in the $(T, mu_q)$ plane are investigated in the low density regime.