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arXiv 1503.07049hep-lat
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强耦合下QCD phase diagram的涨落效应

Fluctuation effects on QCD phase diagram at strong coupling

Terukazu Ichihara, Akira Ohnishi

摘要:

利用辅助场蒙特卡罗(AFMC)方法研究了强耦合极限(SCL)以外的涨落效应下的QCD相图。首先,我们给出了一个有效的作用量,它包含了强耦合展开的次领先阶(NLO)有限耦合效应以及涨落效应。其次,我们研究了零夸克密度下AFMC中强耦合展开的非线性光学效应。我们发现,手征凝聚体减少的非线性光学项的时间斑和起伏的影响,而几乎没有依赖于非线性光学项的空间斑在目前的分析。这些行为可以从平均场分析中的辅助场对质量和波函数重整化因子的修正以及强耦合极限下的涨落效应中得到理解。

英文摘要:

We study the QCD phase diagram away from the strong coupling limit (SCL) with fluctuation effects in the auxiliary field Monte-Carlo (AFMC) method. First, we give an effective action which contains next-to-leading order (NLO) finite coupling effects of the strong coupling expansion as well as fluctuation effects. Second, we examine NLO effects of the strong coupling expansion in AFMC at zero quark density. We find that the chiral condensate is reduced by both NLO terms from temporal plaquettes and fluctuation effects, and almost no dependence on NLO terms from spatial plaquettes in the current analysis. These behaviors can be understood from the modification of the mass and the wave function renormalization factor by auxiliary fields as in the mean field analysis and the fluctuation effects in the strong coupling limit.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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