World-sheet Instantons via the Myers Effect and N=1^* Quiver Superpotentials

Details World-sheet Instantons via the Myers Effect and N=1^* Quiver Superpotentials World-sheet Instantons via the Myers Effect and N=1^* Quiver Superpotentials

2002-06-06

arxiv.org/abs/hep-th/0206051v2

JHEP 0210:077,2002

Physics

High Energy Physics

High Energy Physics - Theory

24 pages, JHEP, some small errors and typos corrected

Scientific paper

10.1088/1126-6708/2002/10/077

In this note we explore the stringy interpretation of non-perturbative effects in N=1^* deformations of the A_{k-1} quiver models. For certain types of deformations we argue that the massive vacua are described by Nk fractional D3-branes at the orbifold polarizing into k concentric 5-brane spheres each carrying fractional brane charge. The polarization of the D3-branes induces a polarization of D-instantons into string world-sheets wrapped on the Myers spheres. We show that the superpotentials in these models are indeed generated by these world-sheet instantons. We point out that for certain parameter values the condensates yield the exact superpotential for a relevant deformation of the Klebanov-Witten conifold theory.

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