Twisted Modules over Lattice Vertex Algebras

@article{Bakalov2004TwistedMO,
  title={Twisted Modules over Lattice Vertex Algebras},
  author={Bojko Bakalov and Victor G. Kac},
  journal={arXiv: Quantum Algebra},
  year={2004}
}
For any integral lattice $Q$, one can construct a vertex algebra $V_Q$ called a lattice vertex algebra. If $\sigma$ is an automorphism of $Q$ of finite order, it can be lifted to an automorphism of $V_Q$. In this paper we classify the irreducible $\sigma$-twisted $V_Q$-modules. We show that the category of $\sigma$-twisted $V_Q$-modules is a semisimple abelian category with finitely many isomorphism classes of simple objects. 

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