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arXiv 1012.1509hep-lat
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强耦合格点量子色动力学中的手征跃迁和退禁闭跃迁

Chiral and deconfinement transitions in strong coupling lattice QCD

Kohtaroh Miura, Takashi Z. Nakano, Akira Ohnishi, Noboru Kawamoto

摘要:

我们研究了在有限温度和有限化学势下,基于单种交错费米子的格点量子色动力学的强耦合展开的QCD相图。在平均场近似下,我们解析地导出了一个包含手征和解禁闭(Z_3)动力学的有效势。我们着重研究了全T-mu平面上的Polyakov圈性质,并研究了手征交叉与退禁闭交叉之间的关系。在一个固定的大mu下,随着T的增加,观察到Polyakov环的序列快速变化。将它们统称为“手性诱导”和“Z_3诱导”的去禁闭交叉是很自然的。

英文摘要:

We investigate the QCD phase diagram based on the strong coupling expansion of the lattice QCD with one species of the staggered fermions at finite temperature (T) and chemical potential (mu). We analytically derive an effective potential including both chiral and deconfinement (Z_3) dynamics with finite coupling effects in mean-field approximations. We focus on Polyakov loop properties in whole T-mu plane, and study relations between the chiral and deconfinement crossovers. At a fixed large mu, sequencial rapid variations of the Polyakov loop are observed with increasing T. It is natural to interprete them as the "chiral induced" and "Z_3 induced" deconfinement crossovers.

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