Multiplexed dispersive readout of superconducting phase qubits

ORAL

Abstract

A dispersive readout scheme is being developed for superconducting phase qubits. By inductively coupling to a LC resonator, the measured state of the qubit (left or right side of the potential well) can be read out as a shift of the resonance frequency. Compared to our current SQUID readout, this method eliminates the generation of quasiparticles, increases the reliability by reducing the junction count per qubit from 4 to 1, and reduces the chip wire count since the readout can be frequency multiplexed.

*This work is supported by IARPA under ARO award W911NF-08-1-0336 and under ARO award W911NF-09-1-0375.

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Authors

  • Yu Chen

    • Department of Physics, Uinversity of California-Santa Barbara

  • Rami Barends

    • Department of Physics, Uinversity of California-Santa Barbara

  • Radoslaw Bialczak

    • Department of Physics, Uinversity of California-Santa Barbara

  • Julian Kelly

    • Department of Physics, Uinversity of California-Santa Barbara

  • Micheal Lenander

    • Department of Physics, Uinversity of California-Santa Barbara

  • Erik Lucero

    • Department of Physics, Uinversity of California-Santa Barbara

  • Matteo Mariantoni

    • Department of Physics, Uinversity of California-Santa Barbara

  • Matthew Neeley

    • Department of Physics, Uinversity of California-Santa Barbara

  • Aaron O'Connell

    • Department of Physics, Uinversity of California-Santa Barbara

  • Peter O'Malley

    • Department of Physics, Uinversity of California-Santa Barbara

  • Daniel Sank

  • Amit Vainsencher

    • Department of Physics, Uinversity of California-Santa Barbara

  • Haohua Wang

    • Department of Physics, Uinversity of California-Santa Barbara

  • Martin Weides

    • Department of Physics, Uinversity of California-Santa Barbara

  • James Wenner

    • Department of Physics, Uinversity of California-Santa Barbara

  • Theodore White

    • Department of Physics, Uinversity of California-Santa Barbara

  • Yi Yin

    • Department of Physics, Uinversity of California-Santa Barbara

  • Jian Zhao

    • Department of Physics, Uinversity of California-Santa Barbara

  • Andrew Cleland

    • Department of Physics, Uinversity of California-Santa Barbara

  • John Martinis

    • Department of Physics, Uinversity of California-Santa Barbara