English

Twisted $\phi$-coordinated modules for vertex algebras and Zhu's correspondence theorem

Quantum Algebra 2025-12-02 v1

Abstract

Let VV be a vertex algebra and gg be an automorphism of VV of order TT. For any n,m(1/T)Nn, m \in (1/T)\mathbb{N}, we construct an A~g,n(V) ⁣ ⁣A~g,m(V)\tilde{A}_{g,n}(V)\!-\!\tilde{A}_{g,m}(V)-bimodule A~g,n,m(V)\tilde{A}_{g,n,m}(V), where A~g,n(V)\tilde{A}_{g,n}(V) denotes the associative algebra constructed by the authors in \cite{Shun1}. We introduce the notion of (1/T)N(1/T)\mathbb{N}-graded gg-twisted ϕ\phi-coordinated VV-modules and prove that there exists a bijection between the simple A~g(V)\tilde{A}_{g}(V)-modules and the irreducible (1/T)N(1/T)\mathbb{N}-graded gg-twisted ϕ\phi-coordinated VV-modules, where A~g(V)=A~g,0(V)\tilde{A}_{g}(V)=\tilde{A}_{g,0}(V). We construct the universal enveloping algebra U(V[g])U(V[g]), showing that A~g(V)\tilde{A}_{g}(V) is subquotient of U(V[g])U(V[g]). When VV is vertex operator algebra, we show that each A~g,n,m(V)\tilde{A}_{g,n,m}(V) is isomorphic to the Ag,n(V)Ag,m(V)A_{g,n}(V)-A_{g,m}(V)-bimodule Ag,n,m(V)A_{g,n,m}(V) constructed by Dong and Jiang~\cite{DJ2}. Also we prove that there exists a bijection between the irreducible admissible gg-twisted VV-modules and the irreducible (1/T)N(1/T)\mathbb{N}-graded gg-twisted ϕ\phi-coordinated VV-modules.

Keywords

Cite

@article{arxiv.2512.01272,
  title  = {Twisted $\phi$-coordinated modules for vertex algebras and Zhu's correspondence theorem},
  author = {Shun Xu},
  journal= {arXiv preprint arXiv:2512.01272},
  year   = {2025}
}

Comments

44 pages