Summing up D-Instantons

Hirosi Ooguri, Cumrun Vafa

Published 1996-08-12, updated 1996-08-13Version 2

We investigate quantum corrections to the moduli space for hypermultiplets for type IIA near a conifold singularity. We find a unique quantum deformation based on symmetry arguments which is consistent with a recent conjecture. The correction can be interpreted as an infinite sum coming from multiple wrappings of the Euclidean D-branes around the vanishing cycle.