title: Local current injection into mesoscopic superconductors for the manipulation of quantum states.
abstract: We perform strategic current injection in a small mesoscopic superconductor and control the (non)equilibrium quantum states in an applied homogeneous magnetic field. In doing so, we realize a current-driven splitting of multiquanta vortices, current-induced transitions between states with different angular momenta, and current-controlled switching between otherwise degenerate quantum states. These fundamental phenomena form the basis for the electronic and logic applications discussed, and are confirmed in both theoretical simulations and multiple-small-tunnel-junction transport measurements.
authors.affiliation: Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium.
authors.forename: M V
authors.initials: MV
authors.lastname: Milosević
authors.forename: A
authors.initials: A
authors.lastname: Kanda
authors.forename: S
authors.initials: S
authors.lastname: Hatsumi
authors.forename: F M
authors.initials: FM
authors.lastname: Peeters
authors.forename: Y
authors.initials: Y
authors.lastname: Ootuka