Quantum chi-independence for quasimap generating series

For a fixed rank r{\mathsf r}, define the generating series obtained by summing over the flux index, QMˇd(q)=aQMˇda(q)\check{\mathsf{QM}}_{\mathsf d}(q)=\sum_{\mathsf a}\check{\mathsf{QM}}^{\mathsf a}_{\mathsf d}(q) and QM^d(q)=aQM^da(q)\hat{\mathsf{QM}}_{\mathsf d}(q)=\sum_{\mathsf a}\hat{\mathsf{QM}}^{\mathsf a}_{\mathsf d}(q). Quantum χ\chi-independence. If gcd(r,d)=1\gcd({\mathsf r},{\mathsf d})=1 and gcd(r,d)=1\gcd({\mathsf r},{\mathsf d'})=1, then

QMˇd(q)=QMˇd(q),QM^d(q)=QM^d(q).\check{\mathsf{QM}}_{\mathsf d}(q)=\check{\mathsf{QM}}_{{\mathsf d'}}(q),\qquad \hat{\mathsf{QM}}_{\mathsf d}(q)=\hat{\mathsf{QM}}_{{\mathsf d'}}(q).

The claim predicts degree-independence after forgetting the flux; the source motivates it from the explicit higher-rank expressions.

Sources & referencesView supporting material

Primary source

Denis Nesterov, “Enumerative mirror symmetry for moduli spaces of Higgs bundles and S-duality”, arXiv:2302.08379 (2023).

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