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arXiv 0812.1858hep-th
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连续介质中的空间威尔逊圈,解压缩SU(2)Yang-Mills热力学

Spatial Wilson loop in continuum, deconfining SU(2) Yang-Mills thermodynamics

Josef Ludescher, Jochen Keller, Francesco Giacosa, Ralf Hofmann

摘要:

明确了描述4D SU(2)和SU(3)连续体、无限体积Yang-Mills热力学的有效作用量在其去限制和预限制阶段的不确定性。随后,在Korthals-Altes提出的方法中计算空间弦张力。这种SU(2)计算是基于一个特殊的,有效的双回路校正的压力需要提取的假设数密度的孤立和屏蔽磁单极子或反单极子在退澄清阶段。通过对有效理论中边长为$L$的二次空间轮廓内的树级无质量单圈缀饰模的交换取幂,我们证明了对于$L\to\infty$,威尔逊圈具有{ \sl周长}定律.这与严格的{ \sl晶格}结果相反,该结果服从Wilson作用,并且该作用在足够高的温度下有效。然而,在有效理论的框架中,对于小的(空间未分辨的)$L$存在一种机制,即空间威尔逊圈的指数具有作为$L$的函数的曲率。

英文摘要:

The uniquess of the effective actions describing 4D SU(2) and SU(3) continuum, infinite-volume Yang-Mills thermodynamics in their deconfining and preconfining phases is made explicit. Subsequently, the spatial string tension is computed in the approach proposed by Korthals-Altes. This SU(2) calculation is based on a particular, effective two-loop correction to the pressure needed for the extraction of the hypothetic number density of isolated and screened magnetic monopoles or antimonopoles in the deconfining phase. By exponentiating the exchange of the tree-level massless but one-loop dressed mode within a quadratic spatial contour of side-length $L$ in the effective theory we demonstrate that for $L\to\infty$ the Wilson loop exhibits {\sl perimeter} law. This is in contrast to a rigorous {\sl lattice} result subject to the Wilson action and for this action valid at sufficiently high temperature. In the framework of the effective theory there is, however, a regime for small (spatially unresolved) $L$ were the exponent of the spatial Wilson loop possesses curvature as a function of $L$.

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