2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/90735An experiment that shows the modulation of the Aharonov-Bohm oscillations of magneto-resistance in a mesoscopic ring is described. Possible theoretical explanations of this modulation due to the interaction of the electron spin with the magnetic and electric fields are considered.A slightly different version was published in Science, Vol. 297, 1656 (Sept. 6, 2002)Quantum Physicstext