title: Resonant Cooper pair tunneling through a double-island qubit.
abstract: We have measured transport in the Coulomb blockade regime through a quantum system consisting of two superconducting islands coupled by a Josephson junction. The double island is weakly connected to leads by small superconducting tunnel junctions. At low bias voltages, a new resonant transport process for Cooper pairs is observed. The results show that Cooper pair transport can be used as a probe of the macroscopic energy levels of the double island.
authors.affiliation: Grenoble High Magnetic Field Laboratory, MPI-FKF and CNRS, BP 166, F-38042 Grenoble Cedex 9, France.
authors.forename: E
authors.initials: E
authors.lastname: Bibow
authors.forename: P
authors.initials: P
authors.lastname: Lafarge
authors.forename: L P
authors.initials: LP
authors.lastname: Lévy