Higher Chiral Algebras in a Polysimplicial Model

Abstract

Vertex algebras are equivalent to translation-equivariant chiral algebras on ${\mathbb{A}}^1$, in the sense of Beilinson and Drinfeld. In this paper we give an algebraic construction of a chiral algebra on ${\mathbb{A}}^n$; this can be seen as an algebraic construction of a higher-dimensional vertex algebra. We introduce a model, in dg commutative algebras, of the derived algebra of functions on the configuration space of $k$ distinct labelled marked points in ${\mathbb{A}}^n$. Working in this model -- which we call the polysimplicial model -- we obtain a dg operad of chiral operations on a degree-shifted copy of the canonical sheaf. We prove that there is a quasi-isomorphism, to this dg operad, from the Lie-infinity operad. This result makes the shifted canonical sheaf into a first example of a homotopy polysimplicial chiral algebra on ${\mathbb{A}}^n$, in a sense which generalizes to higher dimensions Malikov and Schechtman's notion of a homotopy chiral algebra.

74 pages. Comments are welcome