Parity measurement via ancillary RF-SQUIDs for superconducting flux qubit quantum annealers

ORAL

Abstract

Next generation quantum annealing (QA) will likely rely on error suppression codes. Proposals for error suppression in QA often use energy penalties [Quantum Inf. Process. 16: 89 (2017)] or parity measurements [Phys.Rev.A 95, 032317 (2017)]. We propose a device to do parity measurements in quantum annealers based on flux qubits. This device consists of two RF-SQUIDs coupled to the measured qubits. We simulate the quantum measurement process, including realistic implementation effects. We consider generalizations of this approach to higher-order parity measurements. We also present a different approach based on symmetrical coupling of a flux readout device, designed to measure parity information. Prospects for experimental demonstration are discussed.

*This material is based upon work supported by the Intelligence Advanced Research Projects Activity (IARPA) and the Army Research Office (ARO) under Contract No. W911NF-17-C-0050. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the Intelligence Advanced Research Projects Activity (IARPA) and the Army Research Office (ARO).

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Presenters

  • Antonio Martinez

    • University of Waterloo
    • Institute for Quantum Computing, Department of Physics and Astronomy, and Waterloo Institute for Nanotechnology, University of Waterloo
    • Physics and Astronomy, Institute for Quantum Computing, Waterloo Institute for Nanotechnology, University of Waterloo

Authors

  • Antonio Martinez

    • University of Waterloo
    • Institute for Quantum Computing, Department of Physics and Astronomy, and Waterloo Institute for Nanotechnology, University of Waterloo
    • Physics and Astronomy, Institute for Quantum Computing, Waterloo Institute for Nanotechnology, University of Waterloo

  • Denis Melanson

    • Institute for Quantum Computing, Department of Physics and Astronomy, and Waterloo Institute for Nanotechnology, University of Waterloo
    • Physics and Astronomy, Institute for Quantum Computing, Waterloo Institute for Nanotechnology, University of Waterloo

  • Daniel Tennant

    • Physics, University of Texas
    • Institute for Quantum Computing, Department of Physics and Astronomy, and Waterloo Institute for Nanotechnology, University of Waterloo

  • Yongchao Tang

    • Institute for Quantum Computing, University of Waterloo
    • University of Waterloo
    • Institute for Quantum Computing, Department of Physics and Astronomy, and Waterloo Institute for Nanotechnology, University of Waterloo
    • Physics and Astronomy, Institute for Quantum Computing, Waterloo Institute for Nanotechnology, University of Waterloo

  • Sergey Novikov

    • Northrop Grumman
    • Northrop Grumman - Mission Systems
    • Northrop Grumman Corporation - Mission Systems

  • Steven Disseler

    • National Institute of Standards and Technology
    • Northrop Grumman - Mission Systems
    • Northrop Grumman

  • James I. Basham

    • Northrop Grumman - Mission Systems
    • Northrop Grumman

  • Jeffrey Grover

    • Northrop Grumman - Mission Systems
    • Northrop Grumman

  • Alexander Marakov

    • Northrop Grumman - Mission Systems
    • Northrop Grumman

  • Zachary A Stegen

    • Northrop Grumman - Mission Systems
    • Northrop Grumman

  • Adrian Lupascu

    • University of Waterloo
    • Institute for Quantum Computing, Department of Physics and Astronomy, and Waterloo Institute for Nanotechnology, University of Waterloo
    • Physics and Astronomy, Institute for Quantum Computing, Waterloo Institute for Nanotechnology, University of Waterloo