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arXiv 1603.04367math.QAhep-thmath.RT
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顶点算子代数的(对数)扭模的结合代数

Associative algebras for (logarithmic) twisted modules for a vertex operator algebra

Yi-Zhi Huang, Jinwei Yang

摘要:

我们从一个顶点算子代数$V$和$V$的一般自同构$g$构造了两个结合代数.第一种称为$g$ -扭曲零模代数,是我们称为$g$ -$V$的扭曲泛包络代数的子商。这些代数是Frenkel-Zhu和Nagatomo-Tsuchiya在$g$是单位元的(无扭)情形下引入和研究的相应代数的推广.另一个是当$g$的阶为有限时,对Dong-Li-Mason构造的合适的$g$-扭模,推广了朱代数的$g$ -扭形式.本文主要研究第一作者在$g$为无限阶且不半单作用于$V$的情况下引入的$g$ -扭$V$ -模。在这种情况下,扭曲顶点算子通常涉及变量的对数。我们构造函子之间的类别合适的模块,这些结合代数和类别合适的(对数)$g$ -扭曲$V$ -模块。利用这些函子,我们证明了$g$ -扭零模代数与朱氏代数的$g$ -扭推广实际上是同构的.

英文摘要:

We construct two associative algebras from a vertex operator algebra $V$ and a general automorphism $g$ of $V$. The first, called $g$-twisted zero-mode algebra, is a subquotient of what we call $g$-twisted universal enveloping algebra of $V$. These algebras are generalizations of the corresponding algebras introduced and studied by Frenkel-Zhu and Nagatomo-Tsuchiya in the (untwisted) case that $g$ is the identity. The other is a generalization of the $g$-twisted version of Zhu's algebra for suitable $g$-twisted modules constructed by Dong-Li-Mason when the order of $g$ is finite. We are mainly interested in $g$-twisted $V$-modules introduced by the first author in the case that $g$ is of infinite order and does not act on $V$ semisimply. In this case, twisted vertex operators in general involve the logarithm of the variable. We construct functors between categories of suitable modules for these associative algebras and categories of suitable (logarithmic) $g$-twisted $V$-modules. Using these functors, we prove that the $g$-twisted zero-mode algebra and the $g$-twisted generalization of Zhu's algebra are in fact isomorphic.

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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