Weak-link-based nonreciprocal devices

ORAL

Abstract

We introduce a coupling scheme based on weak-link junctions that breaks time-reversal symmetry without the need of external drives. Exploiting this idea, we present the design of a dissipationless gyrator that can be used as a building block for the GKP qubit [1]. We moreover extend these concepts to other nonreciprocal devices and discuss applications to quantum information processing.

[1] Rymarz, M., Bosco, S., Ciani, A., & DiVincenzo, D. (2021). Hardware-Encoding Grid States in a Nonreciprocal Superconducting Circuit. Phys. Rev. X, 11, 011032.

*This work was undertaken thanks in part to funding from NSERC, the Canada First Research Excellence Fund, and the Ministère de l'Économie et de l'Innovation du Québec. ARO grant No. W911NF-18-1-0411.

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Presenters

  • Catherine Leroux

    • Universite de Sherbrooke
    • Institut quantique & Département de Physique, Université de Sherbrooke, Sherbrooke J1K2R1, Quebec, Canada

Authors

  • Catherine Leroux

    • Universite de Sherbrooke
    • Institut quantique & Département de Physique, Université de Sherbrooke, Sherbrooke J1K2R1, Quebec, Canada

  • Andras Gyenis

    • Department of Electrical, Computer & Energy Engineering, University of Colorado Boulder, CO 80309, USA
    • University of Colorado Boulder

  • Morten Kjaergaard

    • Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Copenhagen Denmark.
    • University of Copenhagen

  • Agustin Di Paolo

    • Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
    • Universite de Sherbrooke
    • MIT
    • Massachusetts Institute of Technology MIT
    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology

  • Charles M Marcus

    • Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Copenhagen Denmark.
    • Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
    • Univ of Copenhagen

  • Alexandre Blais

    • Universite de Sherbrooke
    • Institut quantique & Département de Physique, Université de Sherbrooke, Sherbrooke J1K2R1, Quebec, Canada