11 papers
Adiabatic quantum computation with flux qubits, first experimental results
S. H. W. van der Ploeg, A. Izmalkov, M. Grajcar +10
Controllable adiabatic evolution of a multi-qubit system can be used for adiabatic quantum computation (AQC). This evolution ends at a configuration where the Hamiltonian of the sy…
Sign- and magnitude-tunable coupler for superconducting flux qubits
R. Harris, A. J. Berkley, M. W. Johnson +11
We experimentally confirm the functionality of a coupling element for flux-based superconducting qubits, with a coupling strength whose sign and magnitude can be tuned {\it in…
Low-frequency characterization of quantum tunneling in flux qubits
Ya. S. Greenberg, A. Izmalkov, M. Grajcar +5
We propose to investigate flux qubits by the impedance measurement technique (IMT), currently used to determine the current--phase relation in Josephson junctions. We analyze in de…
Tunable coupling of superconducting qubits
Alexandre Blais, Alec Maassen van den Brink, A. M. Zagoskin
We study an LC-circuit implemented using a current-biased Josephson junction (CBJJ) as a tunable coupler for superconducting qubits. By modulating the bias current, the junction ca…
Multi-Terminal Superconducting Phase Qubit
M. H. S. Amin, A. N. Omelyanchouk, A. Blais +4
Mesoscopic multi-terminal Josephson junctions are novel devices that provide weak coupling between several bulk superconductors through a common normal layer. Because of the nonloc…
SUSY Transformations for Quasinormal Modes of Open Systems
P. T. Leung, Alec Maassen van den Brink, W. M. Suen +2
Supersymmetry (SUSY) in quantum mechanics is extended from square-integrable states to those satisfying the outgoing-wave boundary condition, in a Klein-Gordon formulation. This bo…