Vacuum structure of bifundamental gauge theories at finite topological angles
arXiv:1705.01949 · doi:10.1007/JHEP06(2017)102
Abstract
We discuss possible vacuum structures of $SU(n)\times SU(n)$ gauge theories with bifundamental matters at finite $θ$ angles. In order to give a precise constraint, a mixed 't Hooft anomaly is studied in detail by gauging the center $\mathbb{Z}_n$ one-form symmetry of the bifundamental gauge theory. We propose phase diagrams that are consistent with the constraints, and also give a heuristic explanation of the result based on the dual superconductor scenario of confinement.
28 pages, 6 figures; (v2) references added