Properties of a Protected Qubit based on the Superconducting Current Mirror

ORAL

Abstract

Protected quantum circuits are promising candidates to serve as building blocks of fault-tolerant universal quantum computers. One of these designs has been proposed to implement a protected qubit based on two Josephson junction chains with strong interchain capacitive coupling and forming a Moebius strip [1]. In this talk, we present a full circuit analysis to investigate the low-energy spectrum of the device, and the susceptibility to charge and flux noise. Our analytical and numerical studies elucidate the promised protection, motivate practical control protocols, and hence pave the way for the first experimental realization of the design.

[1] A. Kitaev, Protected qubit based on a superconducting current mirror, arXiv:0609441 (2006)

*This research was supported by the Army Research Office under contract W911NF-17-C-0024.

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Presenters

  • Andy C. Y. Li

    • Northwestern Univeristy
    • Department of Physics and Astronomy, Northwestern University

Authors

  • Andy C. Y. Li

    • Northwestern Univeristy
    • Department of Physics and Astronomy, Northwestern University

  • Jens Koch

    • Northwestern Univeristy
    • Department of Physics and Astronomy, Northwestern University
    • Department of Physics and Astronomy, Northwestern Univ
    • Department of Physics & Astronomy, Northwestern University
    • Northwestern University
    • Physics, Northwestern University