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.

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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