Controlling the protected soft zero-pi qubit

ORAL

Abstract

The soft zero-pi circuit [1, 2, 3] has shown experimental evidence of protection against relaxation and dephasing, making it a promising candidate for high-fidelity quantum processing. Here, we show improved Ramsey dephasing times resulting from a larger ratio of the charging energies for the two participating modes, pushing the zero-pi further into its protected regime. We review possible gate schemes for the zero-pi, emphasizing the challenges of realizing two-tone Raman gates in protected superconducting qubits.

[1] A. Kitaev. arXiv:cond-mat/0609441 (2006).

[2] P. Brooks, A. Kitaev, J. Preskill. Phys. Rev. A 87, 052306 (2013).

[3] A. Gyenis, P. Mundada, A. Di Paolo et. al. arXiv:1910.07542 (2019).

*This research was supported by NSF GRF, ARO, MRSEC, and the DOE through C2QA.

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Presenters

  • Anjali Premkumar

    • Princeton University

Authors

  • Anjali Premkumar

    • Princeton University

  • András Gyenis

    • Univ of Copenhagen
    • University of Colorado Boulder

  • Pranav S Mundada

    • Q-CTRL
    • Princeton University

  • Sara F Sussman

    • Princeton

  • Xanthe Croot

    • Princeton University

  • Jens Koch

    • Northwestern University

  • Andrew A Houck

    • Princeton University