Computing Genus-Zero Twisted Gromov-Witten Invariants

Abstract

Twisted Gromov-Witten invariants are intersection numbers in moduli spaces of stable maps to a manifold or orbifold X which depend in addition on a vector bundle over X and an invertible multiplicative characteristic class. Special cases are closely related to local Gromov-Witten invariants of the bundle, and to genus-zero one-point invariants of complete intersections in X. We develop tools for computing genus-zero twisted Gromov-Witten invariants of orbifolds and apply them to several examples. We prove a "quantum Lefschetz theorem" which expresses genus-zero one-point Gromov-Witten invariants of a complete intersection in terms of those of the ambient orbifold X. We determine the genus-zero Gromov-Witten potential of the type A surface singularity C^2/Z_n. We also compute some genus-zero invariants of C^3/Z_3, verifying predictions of Aganagic-Bouchard-Klemm. In a self-contained Appendix, we determine the relationship between the quantum cohomology of the A_n surface singularity and that of its crepant resolution, thereby proving the Crepant Resolution Conjectures of Ruan and Bryan-Graber in this case.

46 pages. v2: corrected our description of the work of Davesh Maulik. v3 is the refereed version, with many changes: a new appendix containing the results from our preprint arXiv:0704.2034; another new appendix containing foundational results on Givental's Lagrangian cone and formal geometry; also a number of typos were corrected and some references added

References in corpus (8)

• Wall-Crossings in Toric Gromov-Witten Theory I: Crepant Examples
• Central charges, symplectic forms, and hypergeometric series in local mirror symmetry
• Topological Strings and (Almost) Modular Forms
• Gromov-Witten theory of Deligne-Mumford stacks
• The Crepant Resolution Conjecture for Type A Surface Singularities
• Stability conditions on $A_n$-singularities
• Root Systems and the Quantum Cohomology of ADE resolutions
• Chen-Ruan cohomology of ADE singularities

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