Superconducting-qubit coupler design with exponentially large on-off ratio

ORAL

Abstract

We present a design for a superconducting-qubit coupler featuring an exponentially large on-off ratio that is controlled by the amplitude of a microwave drive. In this architecture, the tunable bus interacts with a driven mode such as to, on demand, exponentially suppress the qubit-qubit virtual interactions with respect to the amplitude of the external control field. We demonstrate how this scheme can be used to reduce residual cross-Kerr (or~ZZ) interactions in transmon-qubit-based quantum processors. We also provide a superconducting-circuit implementation of the coupler, which can enable high-fidelity parametric two-qubit gates and help to reduce cross-talk.

*This work was undertaken thanks in part to funding from NSERC, the Canada First Research Excellence Fund and the ARO grant No. W911NF-18-1-0411.

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Presenters

  • Catherine Leroux

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

Authors

  • 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

  • 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