2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/27771We develop a new real-space method which allows to evaluate the Kubo-Greenwood conductivity of independent electrons in static aperiodic potentials. We apply it to a numerical study of propagation modes in 3 dimensional quasiperiodic systems. The effect of quenched disorder is analysed and for Fermi energies in pseudo-gaps, the conductivity can be stable or even increase with disorder.Latex, Phys. Rev. Lett. in pressCondensed Mattertext