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arXiv 1803.09809hep-thhep-lathep-ph
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威尔逊圈的缺陷action

A defect action for Wilson loops

Carlos Hoyos

摘要:

提出了一种有效的计算方法来计算$(S)U(N)$规范理论中威尔逊圈的期望值。作用量由位于圈上的费米子和固定表象的阿贝尔规范场组成。讨论仅限于弱耦合和沿光滑曲线扩展的基本表象中的威尔逊圈,但只要理论具有UV不动点或共形,则对物质含量没有限制。对于圆形威尔逊圈发现其期望值在首阶与由可解高斯矩阵模型确定的${\cal N}=4$ super Yang-Mills的$1/2$ BPS威尔逊圈的精确结果一致.这暗示了与弦论和SYK模型的普遍联系。

英文摘要:

An effective action is proposed to compute the expectation value of Wilson loops in $(S)U(N)$ gauge theories. The action consists of fermions localized on the loop and an Abelian gauge field that fixes the representation. The discussion is limited to weak coupling and Wilson loops in the fundamental representation extended along a smooth curve, but there are no restrictions on the matter content as long as the theory has a UV fixed point or it is conformal. For a circular Wilson loop it is found that the expectation value coincides at leading order with the exact result of the $1/2$ BPS Wilson loop of ${\cal N}=4$ super Yang-Mills, which is determined by a solvable Gaussian matrix model. This hints towards a universal connection to string theory duals and SYK models.

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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