Stability of the symmetry-protected topological phase and Ising transitions in a disordered U(1) quantum link model on a ladder

Mykhailo V. Rakov, Luca Tagliacozzo, Maciej Lewenstein +2

We revisit the U(1) quantum link model in a ladder geometry, finding, by finite-size scaling, that the critical exponent $\nu =1$ and the central charge $c=1/2$ are consistent with th…