On the interplay of disorder and correlations

I address here the question of the mutual interplay of strong correlations and disorder in the system. I consider random version of the Hubbard model. Diagonal randomness is introduced via random on-site energies and treated by the coherent potential approximation. Strong, short ranged, electron ele ctron interactions are described by the slave boson technique and found to induce additional disorder in the system. As an example I calculate the den sity of states of the random interacting binary alloy and compare it with t hat for non-interacting system.