Instantons and Toric Quiver Gauge Theories

Understand

We show how to construct the general action coupling (multi)instantons to gauge theories arising from branes probing arbitrary toric singularities.

• We give a general set of rules for how to construct such an action given the knowledge of the superpotential for the gauge theory.
• The main idea is to obtain the action by higgsing a theory whose instanton dynamics is known, namely an orbifold of N=4 super Yang-Mills.
• We find that the couplings of the fermionic zero-modes with the holomorphic fields are dictated by the structure of the superpotential describing the toric singularity.