2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/19074We study numerically the interplay of disorder and attractive interactions for spin-1/2 fermions in the three-dimensional Hubbard model. The results obtained by projector quantum Monte Carlo simulations show that at moderate disorder, increasing the attractive interaction leads to a transition from delocalized superconducting states to the insulating phase of localized pairs. This transition takes place well within the metallic phase of the single-particle Anderson model.revtex, 4 pages, 3 figuresCondensed Mattertext