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Autonomous error correction of a single logical qubit using two transmons

Author

Listed:
  • Ziqian Li

    (University of Chicago
    University of Chicago
    Stanford University)

  • Tanay Roy

    (University of Chicago
    University of Chicago)

  • David Rodríguez Pérez

    (Colorado School of Mines)

  • Kan-Heng Lee

    (University of Chicago
    University of Chicago)

  • Eliot Kapit

    (Colorado School of Mines)

  • David I. Schuster

    (University of Chicago
    University of Chicago
    Stanford University
    University of Chicago)

Abstract

Large-scale quantum computers will inevitably need quantum error correction to protect information against decoherence. Traditional error correction typically requires many qubits, along with high-efficiency error syndrome measurement and real-time feedback. Autonomous quantum error correction instead uses steady-state bath engineering to perform the correction in a hardware-efficient manner. In this work, we develop a new autonomous quantum error correction scheme that actively corrects single-photon loss and passively suppresses low-frequency dephasing, and we demonstrate an important experimental step towards its full implementation with transmons. Compared to uncorrected encoding, improvements are experimentally witnessed for the logical zero, one, and superposition states. Our results show the potential of implementing hardware-efficient autonomous quantum error correction to enhance the reliability of a transmon-based quantum information processor.

Suggested Citation

  • Ziqian Li & Tanay Roy & David Rodríguez Pérez & Kan-Heng Lee & Eliot Kapit & David I. Schuster, 2024. "Autonomous error correction of a single logical qubit using two transmons," Nature Communications, Nature, vol. 15(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45858-z
    DOI: 10.1038/s41467-024-45858-z
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