$K$-theoretic Coulomb branches of quiver gauge theories and cluster varieties (1910.03186v1)

Abstract: Let $\mathscr{A}q$ be the $K$-theoretic Coulomb branch of a $3d$ $\mathcal{N}=4$ quiver gauge theory with quiver $\Gamma$, and $\mathscr{A}'_q \subseteq \mathscr{A}_q$ be the subalgebra generated by the equivariant $K$-theory of a point together with the dressed minuscule monopole operators $M{\varpi_{i,1},f}$ and $M_{\varpi^*_{i,1},f}$. In this paper, we construct an associated cluster algebra quiver $\mathcal{Q}_\Gamma$ and provide an embedding of the subalgebra $\mathscr{A}'_q$ into the quantized algebra of regular functions on the corresponding cluster variety.