Cancellation of unwanted ZZ interactions by superconducting qubit engineering

ORAL

Abstract

We present a method to cancel the unwanted always-on ZZ interaction in transmon based qubit architectures by qubit engineering. We employ a new engineered qubit, which operates as a weakly anharmonic oscillator and has anharmonicity comparable to the transmon qubit, but with a positive sign. We test this concept on the cross-resonance-gate architecture [1] and outline various strategies for optimal chip design. Based on that, we design a new architecture for a superconducting quantum processor that has an inherent suppression of the unwanted ZZ interactions. Our work addresses on one of the major challenges in a commonly used architecture for superconducting quantum processors, and it enables higher fidelity multiqubit gates.

[1] Chow, J. M. et al. Phys. Rev. Lett. 107, 080502 (2011).

*This research was funded in part by the ARO grant No. W911NF-18-1-0411; and by the Office of the Director of National Intelligence (ODNI), Intelligence Advanced Research Projects Activity (IARPA) 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 ODNI, IARPA, or the US Government.

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Presenters

  • Roni Winik

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

Authors

  • Roni Winik

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

  • Catherine Leroux

    • Universite de Sherbrooke
    • Institut quantique and Departement de Physique, Universite de Sherbrooke
    • Département de Physique, Université de Sherbrooke
    • University of Sherbrooke

  • Agustin Di Paolo

    • Institut quantique and Departement de Physique, Universite de Sherbrooke
    • Universite de Sherbrooke
    • Département de Physique, Université de Sherbrooke
    • Institut quantique & Département de Physique, Université de Sherbrooke
    • Institut Quantique and Departement de Physique, Universite de Sherbrooke, Sherbrooke, Canada
    • Institut quantique and Département de Physique, Universite de Sherbrooke

  • Jochen Braumueller

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

  • Morten Kjaergaard

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

  • Antti Vepsalainen

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

  • David K Kim

    • MIT Lincoln Laboratory
    • MIT Lincoln Lab
    • MIT-Lincoln Lab
    • MIT Lincoln Laboratories
    • Lincoln Laboratory, Massachusetts Institute of Technology (MIT)
    • Massachusetts Institute of Technology (MIT) Lincoln Laboratory

  • Jonilyn Yoder

    • MIT Lincoln Laboratory
    • MIT Lincoln Lab
    • Massachusetts Institute of Technology (MIT) Lincoln Laboratory

  • Alexander Melville

    • MIT Lincoln Laboratory
    • MIT Lincoln Lab
    • MIT Lincoln Laboratories
    • Massachusetts Institute of Technology (MIT) Lincoln Laboratory

  • Bethany Niedzielski

    • MIT Lincoln Laboratory

  • Alexandre Blais

    • Universite de Sherbrooke
    • Institut quantique and Departement de Physique, Universite de Sherbrooke
    • Institut Quantique, Universite de Sherbrooke
    • Département de Physique, Université de Sherbrooke
    • Institut quantique & Département de Physique, Université de Sherbrooke
    • Institut Quantique and Departement de Physique, Universite de Sherbrooke, Sherbrooke, Canada
    • Institut quantique and Département de Physique, Universite de Sherbrooke

  • Simon Gustavsson

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

  • William Oliver

    • Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, Department of Physics, MIT Lincoln Laboratory, Massachusetts Institute of Techn
    • MIT Lincoln Lab
    • MIT Lincoln Laboratory
    • MIT Lincoln Laboratory, Massachusetts Institute of Technology
    • Department of Physics, Department of Electrical Engineering and Computer Science, Research Laboratory of Electronics, Lincoln Laboratory, Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology MIT
    • Department of Electrical Engineering and Computer Science, Department of Physics, Massachusetts Institute of Technology; MIT Lincoln Laboratory
    • Department of Electrical Engineering and Computer Science, Department of Physics, MIT Lincoln Laboratory, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • Research Laboratory of Electronics, Department of Electrical Engineering & Computer Science, Department of Physics, Massachusetts Institute of Technology and MIT Lincoln Labo
    • Physics, MIT
    • MIT-Lincoln Lab
    • MIT Lincoln Laboratories
    • Research Laboratory of Electronics, Department of Physics, Department of Electrical Engineering and Computer Science, Lincoln Laboratory, Massachusetts Institute of Technolog