2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/17681This work presents the study of the excited states of the Cooper problem in the three-dimensional Anderson model. It is shown that the excited pair states remain localized while their excitation energy $ΔE$ is negative. For $ΔE>0$ the particles are delocalized over the three-dimensional lattice.Proceedings of the "Rencontres de Moriond 2001"; 4 pages, 4 figuresCondensed Mattertext