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arXiv 1104.4470hep-th
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N=4超共形场论在S^1 × S^3和指数上的局部化

Localization of N=4 Superconformal Field Theory on S^1 x S^3 and Index

Satoshi Nawata

摘要:

给出了${\cal N}=4$超共形指数的几何意义。利用这种解释,${\cal N}=4$超共形指数可以实现为Scherk-Schwarz变形背景上的配分函数。我们应用TQFT中的局部化方法来计算变形配分函数,因为变形作用量可以写成$δ_ε$ -精确形式。形变作用量的临界点是平面联络的空间,而平面联络实际上是规范场的零模。在平面联络空间上的单圈计算归结为矩阵积分,通过矩阵积分表示${\cal N}=4$超共形指数。

英文摘要:

We provide the geometrical meaning of the ${\cal N}=4$ superconformal index. With this interpretation, the ${\cal N}=4$ superconformal index can be realized as the partition function on a Scherk-Schwarz deformed background. We apply the localization method in TQFT to compute the deformed partition function since the deformed action can be written as a $δ_ε$-exact form. The critical points of the deformed action turn out to be the space of flat connections which are, in fact, zero modes of the gauge field. The one-loop evaluation over the space of flat connections reduces to the matrix integral by which the ${\cal N}=4$ superconformal index is expressed.

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