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arXiv 1111.4677hep-lat
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对交错格点量子色动力学强耦合极限的修正

Towards corrections to the strong coupling limit of staggered lattice QCD

Philippe de Forcrand, Michael Fromm, Jens Langelage, Kotaroh Miura, Owe Philipsen, Wolfgang Unger

摘要:

我们报告的第一个步骤正在进行的项目,增加规范观测和规范修正的交错格点量子色动力学,这已被证明是服从数值模拟的手征极限和有限密度的蠕虫算法的强耦合极限。在这里,我们将展示如何评估的Polyakov循环的期望值在有限温度下的强耦合极限的框架中,允许研究禁闭性质以及那些手征对称性打破。我们发现波利雅科夫环平稳上升,从而发出解除禁闭的信号。手征相变的非解析性质反映在Polyakov环的导数中。我们还讨论了如何建立一个有效的非零晶格耦合理论,这是有效的$O(β)$。

英文摘要:

We report on the first steps of an ongoing project to add gauge observables and gauge corrections to the well-studied strong coupling limit of staggered lattice QCD, which has been shown earlier to be amenable to numerical simulations by the worm algorithm in the chiral limit and at finite density. Here we show how to evaluate the expectation value of the Polyakov loop in the framework of the strong coupling limit at finite temperature, allowing to study confinement properties along with those of chiral symmetry breaking. We find the Polyakov loop to rise smoothly, thus signalling deconfinement. The non-analytic nature of the chiral phase transition is reflected in the derivative of the Polyakov loop. We also discuss how to construct an effective theory for non-zero lattice coupling, which is valid to $O(β)$.

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