Stable maps to Looijenga pairs: orbifold examples

TL;DR

This paper extends the study of log Calabi-Yau surfaces to orbifold settings, providing explicit solutions for various Gromov-Witten theories and exploring their connections to BPS invariants and Donaldson-Thomas theory.

Contribution

It generalizes previous results to orbifold pairs, offering closed-form solutions for multiple Gromov-Witten theories and linking them to BPS and Donaldson-Thomas invariants.

Findings

Explicit solutions for orbifold log Gromov-Witten invariants

Connections established between Gromov-Witten theories and BPS invariants

New examples of BPS integral structures and their relations to DT theory

Abstract

In arXiv:2011.08830 we established a series of correspondences relating five enumerative theories of log Calabi-Yau surfaces, i.e. pairs $(Y,D)$ with $Y$ a smooth projective complex surface and $D=D_1+\dots +D_l$ an anticanonical divisor on $Y$ with each $D_i$ smooth and nef. In this paper we explore the generalisation to $Y$ being a smooth Deligne-Mumford stack with projective coarse moduli space of dimension 2, and $D_i$ nef $\mathbb{Q}$-Cartier divisors. We consider in particular three infinite families of orbifold log Calabi-Yau surfaces, and for each of them we provide closed form solutions of the maximal contact log Gromov-Witten theory of the pair $(Y,D)$, the local Gromov-Witten theory of the total space of $\bigoplus_i \mathcal{O}_Y(-D_i)$, and the open Gromov-Witten theory of toric orbi-branes in a Calabi-Yau 3-orbifold associated to $(Y,D)$. We also consider new examples of BPS integral structures underlying these invariants, and relate them to the Donaldson-Thomas theory of a symmetric quiver specified by $(Y,D)$, and to a class of open/closed BPS invariants.