2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/29986The interaction of a Josephson fluxon with an external magnetic field-induced potential in a long Josephson junction is investigated experimentally. The thermal activation of the fluxon from a potential well is observed and experiments probing its predicted quantum properties are discussed. A method for engineering a magnetic double-well potential for a fluxon is proposed and the use of the coupled fluxon states for quantum computation is suggested.11 pages, 6 figuresSuperconductivitytext