Exact multi-instantons in topological string theory

Abstract

Topological string theory has multi-instanton sectors which lead to non-perturbative effects in the string coupling constant and control the large order behavior of the perturbative genus expansion. As proposed by Couso, Edelstein, Schiappa and Vonk, these sectors can be described by a trans-series extension of the BCOV holomorphic anomaly equations. In this paper we find exact, closed form solutions for these multi-instanton trans-series in the case of local Calabi-Yau manifolds. The resulting multi-instanton amplitudes turn out to be very similar to the eigenvalue tunneling amplitudes of matrix models. Their form suggests that the flat coordinates of the Calabi-Yau manifold are naturally quantized in units of the string coupling constant, as postulated in large $N$ dualities. Based on our results we obtain a general picture for the resurgent structure of the topological string in the local case, which we illustrate with explicit calculations in the case of local ${\mathbb{P}}^2$.

36 pages, 3 figures; typos corrected, references added

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• Resurgent Structure of the Topological String and the First Painlevé Equation
• Resurgence of Refined Topological Strings and Dual Partition Functions
• Resurgence, Stokes constants, and arithmetic functions in topological string theory
• Resurgence and Riemann-Hilbert problems for elliptic Calabi-Yau threefolds
• Symplectic cuts and open/closed strings I
• The factorial growth of topological recursion
• Nonperturbative features in the Lie-algebraic Kähler sigma model with fermions