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arXiv 1606.01653hep-th
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具有表面缺陷的${\cal S}_k$类超共形指数

Superconformal index with surface defects for class ${\cal S}_k$

Yuto Ito, Yutaka Yoshida

摘要:

本文研究了从$\mathcal{S}_k$型的6d(1,0)理论得到的$\mathcal{N}=1$超共形规范理论中的表面缺陷。6d(1,0)理论是在$\mathbb{C}^2/\mathbb{Z}_k$奇点处的$N$ M5-膜上的世界体积理论,紧化在具有穿孔的黎曼曲面上。首先,我们应用一种方法的基础上的黎曼表面描述和获得的超共形指数的理论在存在的表面缺陷标记的任意对称表示的$su(N)$。然后,我们提出了另一种描述相同的表面缺陷,其中涉及4D-2D耦合系统,通过识别2D $\mathcal{N}=(0,2)$理论应该耦合。我们计算了4d-2d系统的指数,重现了第一种方法得到的结果。最后,我们研究了二维TQFT结构的指数类$\mathcal{S}_{k}$理论获得几个本征函数和本征值的差分算子,捕捉表面缺陷,并检查它们之间的关系。

英文摘要:

We study surface defects in 4d $\mathcal{N}=1$ $SU(N)$ superconformal gauge theories of class $\mathcal{S}_k$ obtained from the 6d (1,0) theories of type $A_{N-1}$, which are worldvolume theories on $N$ M5-branes at $\mathbb{C}^2/\mathbb{Z}_k$ singularities, compactified on Riemann surfaces with punctures. First we apply a method based on Riemann surface description and obtain the superconformal index of the theories in the presence of surface defects labelled by arbitrary symmetric representations of $su(N)$. Then we propose another description for the same surface defects, which involves 4d-2d coupled systems, by identifying which 2d $\mathcal{N}=(0,2)$ theories should be coupled. We compute the index of the 4d-2d systems and reproduce the results obtained from the first method. Finally we study the 2d TQFT structure of the index for class $\mathcal{S}_{k}$ theories by obtaining several eigenfunctions and eigenvalues of the difference operators that capture the surface defects and checking their relation.

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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