D-instanton probe and the enhançon mechanism from a quiver gauge theory

Abstract

We study the $\mathcal{N}=2$ field theory realized by D3-branes on the ${\mathbb{C}}^2/{\mathbb{Z}}_2$ orbifold. The dual supergravity solution exhibits a repulson singularity cured by the enhancon mechanism. By comparing the open and closed string descriptions of a probe D-instanton, we can compute the exact non-perturbative profile of the supergravity twisted field, which determines the supergravity background. We then show how the non-trivial IR physics of the field theory translates into the stringy effects that give rise to the enhancon mechanism and the associated excision procedure.

32 pages, 3 figures; v2: minor modifications and clarifications, 1 reference added; v3: additional details in sec. 4, version published in JHEP

References in corpus (3)

• Stringy Instantons at Orbifold Singularities
• D-Brane Probes in the Matrix Model
• The N=2 cascade revisited and the enhancon bearings

Cited by in corpus (4)

• Gravity and On-Shell Probe Actions
• Non-perturbative studies of N=2 conformal quiver gauge theories
• Resolved gravity duals of $\mathcal{N}=4$ quiver field theories in 2+1 dimensions
• Holographic backgrounds from D-brane probes