Persistent currents in a one-dimensional ring for a disordered Hubbard model
Persistent currents in a one-dimensional ring for a disordered Hubbard model
We consider a one-dimensional Hubbard model in the presence of disorder. We compute the charge stiffness for a mesoscopic ring, as a function of the size $L$, which is a measure of the permanent currents. We find that for finite disorder the permanent currents of the system with repulsive interactions …