2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/27940Recent experiments on the conductance of high quality quantum wires have revealed an unexpected feature: the quantization step of the conductance is apparently system dependent. We provide the understanding of this behaviour using the appropriately extended random matrix approach. A single additional parameter governs the size of the conductance quantization steps. In effect the behaviour seems to remain `universal', generic for the conductance of a class of mesoscopic systems.4 pages in LaTex + 4 figures in .eps submitted to Phys. Rev. BMesoscale and Nanoscale Physicstext