Cancellation of unwanted ZZ interactions for cross-resonance gates by superconducting qubit engineering

ORAL

Abstract

Superconducting qubit architectures are susceptible to unwanted ZZ interactions that limit 2QB gate fidelities and introduce correlated errors. This unwanted ZZ interaction is especially harmful to the cross-resonance gate. In this talk, we augment the transmon-qubit architecture by introducing a new superconducting qubit similar to the transmon but with positive anharmonicity. We experimentally demonstrate how this new architecture allows the unwanted ZZ between two distinct qubits to be greatly reduced with respect to typical values for transmon-only devices, and how this can be further leveraged to achieve high fidelity gates. We discuss design considerations and show how this approach can be integrated for designing a large-scale device with reduced ZZ between all pairs of nearest neighbors qubits and negligible spectator-qubit effects.

*This research was funded in part by the ARO grant No. W911NF-18-1-0411; and in part by the Department of Defense under Air Force Contract No. FA8721-05-C-0002. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the US Government.

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Presenters

  • Roni Winik

    • MIT Research Laboratory of Electronics
    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • MIT

Authors

  • Roni Winik

    • MIT Research Laboratory of Electronics
    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • MIT

  • Catherine Leroux

    • Universite de Sherbrooke
    • Département de Physique, Université de Sherbrooke

  • Agustin Di Paolo

    • Physics, Universite de Sherbrooke
    • Universite de Sherbrooke
    • Département de Physique, Université de Sherbrooke
    • Institut quantique & Departement de Physique, Universite de Sherbrooke

  • Thomas Hazard

    • MIT Lincoln Laboratory
    • MIT Lincoln Lab
    • Department of Electrical Engineering, Princeton University
    • Lincoln Laboratory, MIT
    • MIT - Lincoln Laboratory

  • Ross Shillito

    • Universite de Sherbrooke
    • Département de Physique, Université de Sherbrooke

  • Antti Vepsalainen

    • Massachusetts Institute of Technology MIT
    • Research Laboratory of Electronics, Massachusetts Institute of Technology

  • Youngkyu Sung

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology
    • MIT
    • Research Laboratory of Electronics, Massachusetts Institute of Technology

  • Ziqiao Ao

    • Massachusetts Institute of Technology MIT

  • Morten Kjaergaard

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • MIT

  • Jochen Braumueller

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • MIT

  • Mollie Schwartz

    • MIT Lincoln Laboratory
    • MIT Lincoln Lab
    • Lincoln Laboratory, MIT
    • MIT - Lincoln Laboratory

  • Kyle Serniak

    • MIT Lincoln Lab
    • MIT Lincoln Laboratory
    • MIT-Lincoln Lab
    • Lincoln Laboratory, MIT
    • MIT - Lincoln Laboratory

  • David K Kim

    • MIT Lincoln Lab
    • MIT Lincoln Laboratory
    • Lincoln Laboratory, MIT
    • MIT - Lincoln Laboratory
    • Massachusetts Institute of Technology MIT

  • Jonilyn Yoder

    • MIT Lincoln Lab
    • MIT Lincoln Laboratory

  • Alexander Melville

    • MIT Lincoln Lab
    • MIT Lincoln Laboratory
    • Lincoln Laboratory, MIT
    • MIT - Lincoln Laboratory

  • Bethany Niedzielski

    • MIT Lincoln Laboratory
    • MIT Lincoln Lab
    • Lincoln Laboratory, MIT
    • MIT - Lincoln Laboratory
    • Massachusetts Institute of Technology MIT

  • Alexandre Blais

    • Universite de Sherbrooke
    • Institut Quantique and Département de Physique, Université de Sherbrooke
    • Physics, Universite de Sherbrooke
    • Université de Sherbrook
    • Université de Sherbrooke
    • Département de Physique, Université de Sherbrooke
    • Institut quantique & Departement de Physique, Universite de Sherbrooke
    • Institut quantique and Departement de physique, Universite de Sherbrooke
    • Institut Quantique and Department de Physique, Universite de Sherbrooke
    • Institut quantique and Departement de Physique, Universite de Sherbrooke

  • Simon Gustavsson

    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • MIT Research Laboratory of Electronics
    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology
    • MIT

  • William Oliver

    • MIT Lincoln Laboratory
    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • Research Laboratory of Electronics, MIT Lincoln Laboratory, Department of Electrical Engineering and Computer Science
    • MIT Research Laboratory of Electronics, MIT Lincoln Laboratory, MIT Department of Electrical Engineering and Computer Science
    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology
    • Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Massachusetts Institute of Technology, MIT Lincoln Laboratory
    • MIT
    • MIT, MIT Lincoln Lab
    • MIT Lincoln Lab
    • MIT Lincoln Lab, Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, and Department of Physics, Massachusetts Institute of Technology. MIT Lincoln L
    • Department of Physics, Department of Electrical Engineering & Computer Science, Research Laboratory of Electronics, MIT Lincoln Laboratory, Massachusetts Institute of Technol
    • Lincoln Laboratory, Research Laboratory of Electronics, and Department of Electrical Engineering & Computer Science, MIT