Wilson loop correlators at strong coupling in $$ \mathcal{N} $$ = 2 quiver gauge theories

Abstract

A bstract We consider 4-dimensional $$ \mathcal{N} $$ N = 2 superconformal quiver theories with SU( N ) M gauge group and bi-fundamental matter and we evaluate correlation functions of n coincident Wilson loops in the planar limit of the theory. Exploiting specific untwisted/twisted combinations of these operators and using supersymmetric localization, we are able to resum the whole perturbative expansion and find exact expressions for these correlators that are valid for all values of the ’t Hooft coupling. Moreover, we analytically derive the leading strong coupling behaviour of the correlators, showing that they obey a remarkable simple rule. Our analysis is complemented by numerical checks based on a Padé resummation of the perturbative series.