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arXiv 0907.2593hep-thmath.GT
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Riemann曲面上曲线的Loop算子和S-对偶

Loop operators and S-duality from curves on Riemann surfaces

Nadav Drukker, David R. Morrison, Takuya Okuda

摘要:

研究了Gaiotto最近提出的一类N=2超共形场论中的Wilson 'tHooft环算子.在规范群是SU(2)群的乘积的情况下,我们根据狄拉克量子化条件下的电荷和磁荷对所有可能的圈算符进行了分类。然后,我们表明,这完全符合德恩的分类同伦类的非自相交曲线上的相关黎曼曲面-相同的表面的特点的规范理论。我们的分析提供了一个明确的预测行动的S-对偶循环运营商在这些理论,我们检查对已知的对偶变换在几个例子。

英文摘要:

We study Wilson-'t Hooft loop operators in a class of N=2 superconformal field theories recently introduced by Gaiotto. In the case that the gauge group is a product of SU(2) groups, we classify all possible loop operators in terms of their electric and magnetic charges subject to the Dirac quantization condition. We then show that this precisely matches Dehn's classification of homotopy classes of non-self-intersecting curves on an associated Riemann surface--the same surface which characterizes the gauge theory. Our analysis provides an explicit prediction for the action of S-duality on loop operators in these theories which we check against the known duality transformation in several examples.

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