title: Non-Abelian superconducting pumps.
abstract: Cooper pair pumping is a coherent process. We derive a general expression for the adiabatic pumped charge in superconducting nanocircuits in the presence of level degeneracy and relate it to non-Abelian holonomies of Wilczek and Zee. We discuss an experimental system where the non-Abelian structure of the adiabatic evolution manifests in the pumped charge.
authors.affiliation: Institut für Theoretische Festkörperphysik and DFG Center for Functional Nanostructures (CFN), Universität Karlsruhe, 76128 Karlsruhe, Germany.
authors.forename: Valentina
authors.initials: V
authors.lastname: Brosco
authors.forename: Rosario
authors.initials: R
authors.lastname: Fazio
authors.forename: F W J
authors.initials: FW
authors.lastname: Hekking
authors.forename: Alain
authors.initials: A
authors.lastname: Joye