Implementation of Continuous Parity Measurements and Error Correction

ORAL

Abstract

Continuous monitoring of quantum systems has been successfully used to examine state collapse and quantum jumps in single qubits. Continuous parity measurements allow for the observation of collapse dynamics in multiqubit systems, and naturally motivate a strategy for performing quantum error correction. One can observe the parity of two dispersive superconducting transmons without the need for ancilla qubits by strongly coupling the former to a joint readout resonator. With three qubits pairwise coupled to two resonators, we can measure two generators of the conventional three-qubit bit-flip code simultaneously. Using high-speed field programmable gate array electronics to continuously monitor these parities, we observe multipartite collapse and can apply correction pulses when an error is detected.

*This work was funded by the Army Research Office.

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Presenters

  • William Livingston

    • Univ of California – Berkeley
    • Physics, Univ of California - Berkeley
    • Univ of California - Berkeley

Authors

  • William Livingston

    • Univ of California – Berkeley
    • Physics, Univ of California - Berkeley
    • Univ of California - Berkeley

  • Machiel Blok

    • Univ of California – Berkeley
    • Univ of California - Berkeley
    • Physics, Univ of California - Berkeley

  • Emmanuel Flurin

    • Physics, Ecole Normale Superieure

  • Juan Atalaya

    • Univ of California - Riverside
    • University of California, Riverside
    • Electrical Engineering, Univ of California - Riverside

  • Justin Dressel

    • Physics, Chapman University
    • Schmid College of Science and Technology, Chapman University
    • Physics, Chapman Univ

  • Andrew Jordan

    • University of Rochester
    • Department of Physics and Astronomy, Univ of Rochester
    • Department of Physics and Astromony, University of Rochester
    • Univ of Rochester
    • Department of physics and astronomy, Univ of Rochester
    • Physics and Astronomy, University of Roshester
    • Physics, Univ of Rochester

  • Alexander Korotkov

    • Univ of California - Riverside
    • Department of Electrical and Computer Engineering, University of California
    • University of California, Riverside
    • Physics, University of California, Riverside
    • Electrical Engineering, Univ of California - Riverside

  • Irfan Siddiqi

    • Univ of California - Berkeley
    • Department of Physics, University of California Berkeley
    • Department of Physics, University of California, Berkeley
    • University of California Berkeley
    • Univ of California – Berkeley
    • Physics, Univ of California -- Berkeley
    • Physics, Univ of California - Berkeley
    • University of California - Berkeley