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arXiv 1804.04592hep-th
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$T^2\times S^2$上$\mathcal N=4$超杨-Mills的拓扑扭指数与椭圆亏格

The topologically twisted index of $\mathcal N=4$ super-Yang-Mills on $T^2\times S^2$ and the elliptic genus

Junho Hong, James T. Liu

摘要:

研究了$T^2\times S^2$超杨-米尔斯的拓扑扭曲指数,并证明了它接受了多个扇区的贡献,这些扇区对应于自由作用的轨道折叠$T^2/\mathbb Z_m\times\mathbb Z_n$,其中$N=mn$ .在对这些扇区求和之后,该指数可以表示为二维$\mathcal N=(0,2)$理论的椭圆亏格,该理论由$S^2$上的卡鲁扎-克莱因约化得到。这提供了另一条通往指数“高温”极限的路径,并证实了与$\mathcal N=(0,2)$理论的右移中心荷的联系。

英文摘要:

We examine the topologically twisted index of $\mathcal N=4$ super-Yang-Mills with gauge group $SU(N)$ on $T^2\times S^2$, and demonstrate that it receives contributions from multiple sectors corresponding to the freely acting orbifolds $T^2/\mathbb Z_m\times\mathbb Z_n$ where $N=mn$. After summing over these sectors, the index can be expressed as the elliptic genus of a two-dimensional $\mathcal N=(0,2)$ theory resulting from Kaluza-Klein reduction on $S^2$. This provides an alternate path to the 'high-temperature' limit of the index, and confirms the connection to the right-moving central charge of the $\mathcal N=(0,2)$ theory.

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