2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/101669Quantum interference and spin-orbit interaction in a one-dimensional mesoscopic semiconductor ring with one input and two output leads can act as a spin beam splitter. Different polarization can be achieved in the two output channels from an originally totally unpolarized incoming spin state, very much like in a Stern-Gerlach apparatus. We determine the relevant parameters such that the device has unit efficiency.4 pages, 3 figures; minor changesMesoscale and Nanoscale Physicstext