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.

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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