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

Bachana Beradze, Mikheil Tsitsishvili, Emanuele Tirrito +3

We consider a system of interacting spinless fermions on a two-leg triangular ladder with $\pi /2$ magnetic flux per triangular plaquette. Microscopically, the system exhibits a U(1)…