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arXiv 1502.04756math.QA
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二阶isometry下格点代数的轨道折叠

Orbifolds of lattice vertex algebras under an isometry of order two

Bojko Bakalov, Jason Elsinger

摘要:

正定偶格$Q$的每个等距$σ$都可以提升为格顶点代数$V_Q$的自同构。顶点代数理论和共形域论中的一个重要问题是对$V_Q$的$σ$ -不变子代数$V_Q^σ$的表示进行分类,称为轨道。当$σ$是$Q$的二阶等距时,我们对Orbifold顶点代数$V_Q^σ$的不可约模进行了分类,并把它们确定为扭曲或非扭曲$V_Q$ -模的子模.给出了$Q$是根格,$σ$是Dynkin图自同构的例子.

英文摘要:

Every isometry $σ$ of a positive-definite even lattice $Q$ can be lifted to an automorphism of the lattice vertex algebra $V_Q$. An important problem in vertex algebra theory and conformal field theory is to classify the representations of the $σ$-invariant subalgebra $V_Q^σ$ of $V_Q$, known as an orbifold. In the case when $σ$ is an isometry of $Q$ of order two, we classify the irreducible modules of the orbifold vertex algebra $V_Q^σ$ and identify them as submodules of twisted or untwisted $V_Q$-modules. The examples where $Q$ is a root lattice and $σ$ is a Dynkin diagram automorphism are presented in detail.

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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