Quantum cohomology of the Hilbert scheme of points on an elliptic surface

We determine the quantum multiplication with divisor classes on the Hilbert scheme of points on an elliptic surface $S\to \mathrm{\Sigma }$ for all curve classes which are contracted by the induced fibration $S^{[n]}\to {\mathrm{\Sigma }}^{[n]}$. The formula is expressed in terms of explicit operators on Fock space. The structure constants are meromorphic quasi-Jacobi forms of index $0$. Combining with work of Hu-Li-Qin, this determines the quantum multiplication with divisors on the Hilbert scheme of elliptic surfaces with $p_g(S)>0$. We also determine the equivariant quantum multiplication with divisor classes for the Hilbert scheme of points on the product $E\times \mathbb{C}$. The proof of our formula is based on Nesterov’s Hilb/PT wall-crossing, a newly established GW/PT correspondence for the product of an elliptic surface times a curve, and new computations in the Gromov-Witten theory of an elliptic curve.