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arXiv 2005.08398math.QAmath.RT
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Virasoro顶点代数和$W$ -代数的置换轨道折叠

Permutation orbifolds of Virasoro vertex algebras and $W$-algebras

Antun Milas, Michael Penn, Christopher Sadowski

摘要:

研究了中心荷$c$的Virasoro顶点代数$\mathcal{V}_c$的$2$ -折叠和$3$ -折叠张量积的置换轨道折叠.特别地,我们证明了对于除了1000个中心电荷以外的所有中心电荷,$\left(\mathcal{V}_c^{\otimes 3}\right)^{\mathbb{Z}_3}$都是$(2, 4, 5, 6^3 , 7, 8^3 , 9^3 , 10^2 )$型的$W$ -代数.我们还研究了它们的单幂零元的轨道折叠,得到了与主幂零元相关联的某些有理仿射$W$ -代数的新实现。进一步分析了著名的$(2,5)$ -极小顶点代数$\mathcal{L}_{-\frac{22}{5}}$的置换轨道。

英文摘要:

We study permutation orbifolds of the $2$-fold and $3$-fold tensor product for the Virasoro vertex algebra $\mathcal{V}_c$ of central charge $c$. In particular, we show that for all but finitely many central charges $\left(\mathcal{V}_c^{\otimes 3}\right)^{\mathbb{Z}_3}$ is a $W$-algebra of type $(2, 4, 5, 6^3 , 7, 8^3 , 9^3 , 10^2 )$. We also study orbifolds of their simple quotients and obtain new realizations of certain rational affine $W$-algebras associated to a principal nilpotent element. Further analysis of permutation orbifolds of the celebrated $(2,5)$-minimal vertex algebra $\mathcal{L}_{-\frac{22}{5}}$ is presented.

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