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Compound Josephson-junction coupler for flux qubits with minimal crosstalk
Harris, R. Lanting, T. Berkley, A. J. Johansson, J. Johnson, M. W. Bunyk, P. Ladizinsky, E. Oh, T. Han, Siyuan
Harris, R.
Lanting, T.
Berkley, A. J.
Johansson, J.
Johnson, M. W.
Bunyk, P.
Ladizinsky, E.
Oh, T.
Han, Siyuan
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Abstract
An improved tunable coupling element for building networks of coupled rf-superconducting quantum interference device (rf-SQUID) flux qubits has been experimentally demonstrated. This new form of coupler, based on the compound Josephson-junction rf-SQUID, provides a sign and magnitude tunable mutual inductance between qubits with minimal nonlinear crosstalk from the coupler tuning parameter into the qubits. Quantitative agreement is shown between an effective one-dimensional model of the coupler’s potential and measurements of the coupler persistent current and susceptibility.
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This is the published version, also available here: http://dx.doi.org/10.1103/PhysRevB.80.052506.
Date
2009-08-20
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American Physical Society
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R. Harris, T. Lanting, A. J. Berkley, J. Johansson, M. W. Johnson, P. Bunyk, E. Ladizinsky, N. Ladizinsky, T. Oh, and S. Han. "Compound Josephson-junction coupler for flux qubits with minimal crosstalk." Phys. Rev. B 80, 052506 – Published 20 August 2009. http://dx.doi.org/10.1103/PhysRevB.80.052506