Benchmarking gates in a qubit-bus-qubit tunable transmon architecture

ORAL

Abstract

Using a newly developed frequency tunable transmon qubit (``Xmon''), we are beginning to construct the fundamental gates and architecture for a quantum computer. We show experimental data for gates in a qubit-bus-qubit configuration. We quantify the fidelity of a set of single qubit gates with both randomized benchmarking and tomography. We also investigate the fast swap style cPhase gate [Strauch PRL 2003], where the control qubit is swapped into the bus and interacts dispersively with the target qubit, as a fundamental two-qubit interaction.

Authors

  • Julian Kelly

    • UC Santa Barbara
  • R. Barends

    • UC Santa Barbara
  • J. Bochmann

    • UC Santa Barbara
  • B. Campbell

    • UC Santa Barbara
  • Y. Chen

    • UC Santa Barbara
  • B. Chiaro

    • UC Santa Barbara
  • E. Jeffrey

    • UC Santa Barbara
  • M. Mariantoni

    • UC Santa Barbara
  • A. Megrant

    • UC Santa Barbara
  • J. Mutus

    • UC Santa Barbara
  • C. Neill

    • UC Santa Barbara
  • P. O'Malley

    • UC Santa Barbara
  • S. Ohya

    • UC Santa Barbara
  • P. Roushan

    • UC Santa Barbara
  • D. Sank

    • UC Santa Barbara
  • A. Vainsencher

    • UC Santa Barbara
  • J. Wenner

    • UC Santa Barbara
  • T. White

    • UC Santa Barbara
  • A.N. Cleland

    • UC Santa Barbara
  • J.M. Martinis

    • UC Santa Barbara