SUSY localization for Coulomb branch operators in omega-deformed 3d N=4 gauge theories

TL;DR

This paper applies SUSY localization to Coulomb branch operators in omega-deformed 3d N=4 gauge theories, revealing non-perturbative effects and connecting physical results with mathematical algebraic structures.

Contribution

It introduces a localization framework for Coulomb branch operators in omega-deformed 3d N=4 theories, including non-perturbative monopole bubbling corrections and relations to mathematical algebra.

Findings

Reproduces abelianization results for certain monopole operators.

Calculates non-perturbative monopole bubbling corrections using matrix models.

Establishes a link between wall-crossing phenomena and operator ordering.

Abstract

We perform SUSY localization for Coulomb branch operators of 3d $\mathcal{N}=4$ gauge theories in $\mathbb{R}^3$ with $\Omega$-deformation. For the dressed monopole operators whose expectation values do not involve non-perturbative corrections, our computations reproduce the results of the so-called abelianization procedure. For the expectation values of other operators and the correlation functions of multiple operators in $U(N)$ gauge theories, we compute the non-perturbative corrections due to monopole bubbling using matrix models obtained by brane construction. We relate the results of localization to algebraic structures discussed in the mathematical literature, and also point out a similar relation for line operators in 4d $\mathcal{N}=2$ gauge theories. For $U(N)$ (quiver) gauge theories in 3d we demonstrate a direct correspondence between wall-crossing and the ordering of operators.