Emergence of non-Abelian SU (2) invariance in Abelian frustrated fermionic ladders

B Beradze, M Tsitsishvili, E Tirrito, M Dalmonte… - Physical Review B, 2023 - APS
We consider a system of interacting spinless fermions on a two-leg triangular ladder with π/2
magnetic flux per triangular plaquette. Microscopically, the system exhibits a U (1) symmetry …