paper

Resurgence Structure to All Orders of Multi-bions in Deformed SUSY Quantum Mechanics

arXiv:1705.10483 · doi:10.1093/ptep/ptx101

Abstract

We investigate the resurgence structure in quantum mechanical models originating in 2d non-linear sigma models with emphasis on nearly supersymmetric and quasi-exactly solvable parameter regimes. By expanding the ground state energy in powers of a supersymmetry-breaking deformation parameter , we derive exact results for the expansion coefficients. In the class of models described by real multiplets, the ground state energy has a non-Borel summable asymptotic series, which gives rise to imaginary ambiguities leading to rich resurgence structure. We discuss the sine-Gordon quantum mechanics (QM) as an example and show that the semiclassical contributions from complex multi-bion solutions correctly reproduce the corresponding part in the exact result including the imaginary ambiguities. As a typical model described by chiral multiplets, we discuss the QM and show that the exact ground state energy can be completely reconstructed from the semiclassical multi-bion contributions. Although the ground state energy has trivial resurgence structure, a simple but rich resurgence structure appears at . We show the complete cancellation between the imaginary ambiguities arising from the non-Borel summable perturbation series and those in the semiclassical contributions of complex bion solutions. We also discuss the resurgence structure of a squashed QM.

61 pages, 8 figures, references added, typos corrected

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