3D Dualities and Supersymmetry Enhancement from Domain Walls

Abstract

We test recently proposed IR dualities and supersymmetry enhancement by studying the supersymmetry on domain walls. In the $SU(3)$ Wess-Zumino model studied in arXiv:1804.02018 and arXiv:1804.05707, we show that domain walls exhibit supersymmetry enhancement. This model was conjectured to be dual to an $\mathcal{N}=2$ abelian gauge theory. We show that domain walls on the gauge theory side are consistent with the proposed duality, as they are described by the same effective theory on the wall. In arXiv:1808.04173, a third model was conjectured to be dual to the same IR theory. We study the phases and domain walls of this model and we show that they also agree. We then consider the analogous $SU(5)$ Wess-Zumino model, and study its mass deformations and phases. We argue that even though one might expect supersymmetry enhancement in this model as well, the analysis of its domain walls shows that there is none. Finally, we study the $\mathcal{N}=2$ model in arXiv:1806.07714 which was conjectured to have $\mathcal{N}=4$ supersymmetry in the IR. In this case we don't see the supersymmetry enhancement on the domain wall; however, we argue that half-BPS domain walls of the $\mathcal{N}=2$ algebra are quarter-BPS of the $\mathcal{N}=4$ algebra. This is then in agreement with the conjectured enhancement, even though it does not show that it takes place.

arXiv comment48 pages

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• Global Aspects of Spaces of Vacua
• Notes on $\mathcal{N}=1$ QCD${}_3$ with baryon superpotential
• Two types of domain walls in $\mathcal{N}=1$ super-QCD: how they are classified and counted
• Sequential deconfinement in $3d$ $\mathcal{N}=2$ gauge theories