D-instantons in Type IIA string theory on Calabi-Yau threefolds

Abstract

Type IIA string theory compactified on a Calabi-Yau threefold has a hypermultiplet moduli space whose metric is known to receive non-perturbative corrections from Euclidean D2-branes wrapped on 3-cycles. These corrections have been computed earlier by making use of mirror symmetry, S-duality and twistorial description of quaternionic geometries. In this paper we compute the leading corrections in each homology class using a direct world-sheet approach without relying on any duality symmetry or supersymmetry. Our results are in perfect agreement with the earlier predictions.

arXiv comment42+17 pages

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Cited by in corpus (9)

• Small Cosmological Constants in String Theory
• Euclidean D-branes in Type IIB string theory on Calabi-Yau threefolds
• Mathematical structures of non-perturbative topological string theory: from GW to DT invariants
• D-instanton Induced Superpotential
• The ZZ annulus one-point function in non-critical string theory: A string field theory analysis
• Normalization of D instanton amplitudes in two dimensional type 0B string theory
• D(-1)-Instanton Superpotential In String Theory
• D-instanton, threshold corrections, and topological string
• The complex Liouville string: worldsheet boundaries and non-perturbative effects