2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/20628We consider a model of a semiconductor quantum ring of finite width in a constant perpendicular magnetic field. We show how a current of the same order as the persistent current can be generated non-adiabatically by a short intensive pulse in the Tera-Hertz regime.LaTeX, 4 pages with included eps figuresMesoscale and Nanoscale Physicstext