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arXiv 1406.4397hep-lat
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格点量子色动力学phase diagram在强耦合极限和远离强耦合极限的情况

The lattice QCD phase diagram in and away from the strong coupling limit

Philippe de Forcrand, Jens Langelage, Owe Philipsen, Wolfgang Unger

摘要:

我们研究了四种交错夸克的格点量子色动力学。在无限规范耦合的极限中,可以引入“对偶”变量,这使得有限密度符号问题变得温和,并允许通过蒙特卡罗模拟完全确定$μ-T$相图,也在手征极限中。然而,连续极限与弱耦合极限一致。我们提出了一个强耦合展开的连续极限的方法。我们展示了第一个结果,包括相图和手性临界点,从这个扩展截断到下一个领先的顺序。

英文摘要:

We study lattice QCD with four flavors of staggered quarks. In the limit of infinite gauge coupling, "dual" variables can be introduced, which render the finite-density sign problem mild and allow a full determination of the $μ-T$ phase diagram by Monte Carlo simulations, also in the chiral limit. However, the continuum limit coincides with the weak coupling limit. We propose a strong-coupling expansion approach towards the continuum limit. We show first results, including the phase diagram and its chiral critical point, from this expansion truncated to next-to-leading order.

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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