Symmetry Enhancement, SPT Absorption, and Duality in QED$_3$
Symmetry Enhancement, SPT Absorption, and Duality in QED$_3$
Quantum Electrodynamics in 2+1 dimensions (QED$_3$) with two Dirac fermions displays time reversal symmetry, nontrivial SPT phases and anomalies. The fate of this theory in its strongly coupled regime has been debated extensively. Surprisingly, we find that gluing together the phase diagrams of two standard Wilson-Fisher $O(4)$ theories suffices to …