Open Gromov-Witten invariants from the Fukaya category

TL;DR

This paper develops a new theoretical framework linking the Fukaya category of a symplectic manifold to open Gromov-Witten invariants of Lagrangians, extending quantum cohomology via relative cyclic homology and open-closed maps.

Contribution

It introduces the concept of relative cyclic homology and constructs a relative cyclic open-closed map, connecting Fukaya categories to open Gromov-Witten invariants.

Findings

Fukaya category determines open Gromov-Witten invariants for Lagrangians.

Extension of quantum cohomology through relative cyclic homology.

Construction of a relative cyclic open-closed map respecting connections.

Abstract

This paper proposes a framework to show that the Fukaya category of a symplectic manifold $X$ determines the open Gromov-Witten invariants of Lagrangians $L \subset X$. We associate to an object in an $A_\infty$-category an extension of the negative cyclic homology, called \emph{relative cyclic homology}. We extend the Getzler-Gauss-Manin connection to relative cyclic homology. Then, we construct (under simplifying technical assumptions) a relative cyclic open-closed map, which maps the relative cyclic homology of a Lagrangian $L$ in the Fukaya category of a symplectic manifold $X$ to the $S^1$-equivariant relative quantum homology of $(X,L)$. Relative quantum homology is the dual to the relative quantum cohomology constructed by Solomon-Tukachinsky. This is an extension of quantum cohomology, and comes equipped with a connection extending the quantum connection. We prove that the relative open-closed map respects connections. As an application of this framework, we show, assuming a construction of the relative cyclic open-closed map in a broader technical setup, that the Fukaya category of a Calabi-Yau variety determines the open Gromov-Witten invariants with one interior marked point for any null-homologous Lagrangian brane.