2008/03/18 by Shamit Kachru, Kachru, Shamit, Dušan Simić +1
Chemistry · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Magnetic confinement fusion research #Molecular Spectroscopy and Structure #Quantum, superfluid, helium dynamics
paper · pdf · doi:10.48550/arxiv.0803.2514
openalex publication_date 2008/03/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
In this note, we study D-brane instantons which intersect N=1 supersymmetric configurations of space-filling D-branes in general Calabi-Yau compactifications of type IIB string theory. Our focus is on rigid ``stringy instantons'' -- those which cannot be interpreted as Yang-Mills instantons in a non-Abelian gauge group on any stack of space-filling D-branes. We show that their contributions to the space-time superpotential can be determined by a topological B-model computation of the tree-level superpotential for a related auxiliary brane system. This computation is very tractable, as it is governed by an A-infinity structure. We summarize the stringy instanton contribution to the space-time superpotential in a simple formula.