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arXiv 1603.08058hep-thhep-lat
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Yang-Mills理论的协变变分方法:Polyakov圈的有效势

Covariant variational approach to Yang-Mills Theory: effective potential of the Polyakov loop

Markus Quandt, Hugo Reinhardt

摘要:

本文用协变变分方法计算了SU(2)和SU(3)Yang-Mills理论中Polyakov圈的有效作用量。将该方法推广到背景规范,并给出了如何将低阶格林函数与先前研究的朗道规范中的格林函数联系起来。重整化过程进行了讨论。自洽的有效行动推导和评估使用的间隙方程的数值解。我们发现了一个明确的信号,在有限的温度下,这是一个解禁闭相变,这是二阶SU(2)和一阶SU(3)。计算得到的临界温度与高精度点阵数据吻合较好。

英文摘要:

We compute the effective action of the Polyakov loop in SU(2) and SU(3) Yang-Mills theory using a previously developed covariant variational approach. The formalism is extended to background gauge and it is shown how to relate the low order Green's functions to the ones in Landau gauge studied earlier. The renormalization procedure is discussed. The self-consistent effective action is derived and evaluated using the numerical solution of the gap equation. We find a clear signal for a deconfinement phase transition at finite temperatures, which is second order for SU(2) and first order for SU(3). The critical temperatures obtained are in reasonable agreement with high precision lattice data.

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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