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High order perturbation theory for difference equations and Borel summability of quantum mirror curves

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arxiv 1709.00854 v1 pith:UTCEG4QI submitted 2017-09-04 hep-th quant-ph

classification hep-thquant-ph
keywords quantumborelalgorithmbwdifferencecurvesdifferencemechanicalmirror
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We adapt the Bender-Wu algorithm to solve perturbatively but very efficiently the eigenvalue problem of "relativistic" quantum mechanical problems whose Hamiltonians are difference operators of the exponential-polynomial type. We implement the algorithm in the function BWDifference in the updated Mathematica package BenderWu. With the help of BWDifference, we survey quantum mirror curves of toric fano Calabi-Yau threefolds, and find strong evidence that not only are the perturbative eigenenergies of the associated 1d quantum mechanical problems Borel summable, but also that the Borel sums are exact.

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