2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/29470The quasiparticle spectrum inside the vortex core in the mixed state of a strongly type-II superconductors are studied. The s-wave symmetry for the gap parameter is assumed. The crossover behavior from dirty to clean limit is shown by numerical calculation based on the random matrix theory.4 pages REVTeX, 4 PostScript figuresSuperconductivitytext