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Reducing the impact of intrinsic dissipation in a superconducting circuit by quantum error detection

Author

Listed:
  • Y. P. Zhong

    (Zhejiang University)

  • Z. L. Wang

    (Zhejiang University)

  • J. M. Martinis

    (University of California)

  • A. N. Cleland

    (University of California)

  • A. N. Korotkov

    (University of California)

  • H. Wang

    (Zhejiang University
    Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China)

Abstract

A fundamental challenge for quantum information processing is reducing the impact of environmentally induced errors. Here we demonstrate a quantum error detection and rejection protocol based on the idea of quantum uncollapsing, using this protocol to reduce the impact of energy relaxation owing to the environment in a three-qubit superconducting circuit. We encode quantum information in a target qubit, and use the other two qubits to detect and reject errors caused by energy relaxation. This protocol improves the storage time of a quantum state by a factor of roughly three, at the cost of a reduced probability of success. This constitutes the first experimental demonstration of the algorithm-based improvement in the lifetime of a quantum state stored in a qubit.

Suggested Citation

  • Y. P. Zhong & Z. L. Wang & J. M. Martinis & A. N. Cleland & A. N. Korotkov & H. Wang, 2014. "Reducing the impact of intrinsic dissipation in a superconducting circuit by quantum error detection," Nature Communications, Nature, vol. 5(1), pages 1-6, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4135
    DOI: 10.1038/ncomms4135
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