Cross-Platform Comparison of Arbitrary Quantum Computations

ORAL

Abstract

As we approach the era of quantum advantage, when quantum computers (QCs) can outperform any classical computer on particular tasks, there remains the difficult challenge of how to validate their performance. While algorithmic success can be easily verified in some instances such as number factoring or oracular algorithms, these approaches only provide pass/fail information for a single QC. On the other hand, a comparison between different QCs on the same arbitrary circuit provides a lower-bound for generic validation: a quantum computation is only as valid as the agreement between the results produced on different QCs. Such an approach is also at the heart of evaluating metrological standards such as disparate atomic clocks. In this talk, we report a cross-platform QC comparison using randomized and correlated measurements that results in a wealth of information on the QC systems. We execute several quantum circuits on widely different physical QC platforms and analyze the cross-platform fidelities.

*This work was supported by the ARO through the IARPA LogiQ program (11IARPA1008), the NSF STAQ Program (PHY-1818914), the AFOSR MURIs on Dissipation Engineering in Open Quantum Systems (FA9550-19-1-0399) and Quantum Interactive Protocols for Quantum Computation (FA9550-18-1-0161), the ARO MURI on Modular Quantum Circuits (W911NF1610349), and the U.S. Department of Energy Quantum Systems Accelerator (QSA) Research Center (DE-FOA-0002253). N.M.L. acknowledges support from the Maryland—Army-Research-Lab Quantum Partnership (W911NF1920181), the Office of Naval Research (N00014-20-1-2695), and the NSF Physics Frontier Center at JQI (PHY-1430094). A.M.G. is supported by a JQI Postdoctoral Fellowship.

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Publication: Zhu, Daiwei, et al. "Cross-Platform Comparison of Arbitrary Quantum Computations." arXiv preprint arXiv:2107.11387 (2021).

Presenters

  • Qingfeng Wang

    • University of Maryland, College Park
    • University of Maryland

Authors

  • Qingfeng Wang

    • University of Maryland, College Park
    • University of Maryland

  • Daiwei Zhu

    • IonQ

  • Ze-Pei Cian

    • University of Maryland, College Park

  • Crystal Noel

    • JQI and QuICS and Department of Physics, University of Maryland, College Park, MD 20742; Duke Quantum Center and Department of Physics (and ECE), Duke University, Durham NC
    • Duke
    • Duke University

  • Andrew Risinger

    • University of Maryland, College Park

  • Debopriyo Biswas

    • DQC and Duke Physics

  • Laird Egan

    • IonQ

  • Yingyue Zhu

    • University of Maryland, College Park

  • Alaina Green

    • Joint Quantum Institute, University of Maryland
    • University of Maryland, College Park

  • Cinthia H Alderete

    • Joint Quantum Institute, University of Maryland
    • University of Maryland, College Park

  • Nhung H Nguyen

    • University of Maryland, College Park

  • Andrii Maksymov

    • IonQ

  • Yunseong Nam

    • IonQ, Inc
    • IonQ

  • Marko Cetina

    • JQI and QuICS and Department of Physics, University of Maryland, College Park, MD 20742; Duke Quantum Center and Department of Physics, Duke University, Durham NC 27701

  • Norbert M Linke

    • University of Maryland, College Park

  • Mohammad Hafezi

    • University of Maryland, College Park
    • UMD

  • Lei O Feng

    • JQI and QuICS and Department of Physics, University of Maryland, College Park, MD 20742; Duke Quantum Center and Department of Physics (and ECE), Duke University; IonQ
    • Duke University