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Realization of a crosstalk-avoided quantum network node using dual-type qubits of the same ion species

Author

Listed:
  • L. Feng

    (Tsinghua University)

  • Y.-Y. Huang

    (Tsinghua University)

  • Y.-K. Wu

    (Tsinghua University
    Hefei National Laboratory)

  • W.-X. Guo

    (Tsinghua University
    HYQ Co. Ltd.)

  • J.-Y. Ma

    (Tsinghua University
    HYQ Co. Ltd.)

  • H.-X. Yang

    (HYQ Co. Ltd.)

  • L. Zhang

    (Tsinghua University)

  • Y. Wang

    (Tsinghua University)

  • C.-X. Huang

    (Tsinghua University)

  • C. Zhang

    (Tsinghua University)

  • L. Yao

    (HYQ Co. Ltd.)

  • B.-X. Qi

    (Tsinghua University)

  • Y.-F. Pu

    (Tsinghua University
    Hefei National Laboratory)

  • Z.-C. Zhou

    (Tsinghua University
    Hefei National Laboratory)

  • L.-M. Duan

    (Tsinghua University
    Hefei National Laboratory
    New Cornerstone Science Laboratory)

Abstract

Generating ion-photon entanglement is a crucial step for scalable trapped-ion quantum networks. To avoid the crosstalk on memory qubits carrying quantum information, it is common to use a different ion species for ion-photon entanglement generation such that the scattered photons are far off-resonant for the memory qubits. However, such a dual-species scheme can be subject to inefficient sympathetic cooling due to the mass mismatch of the ions. Here we demonstrate a trapped-ion quantum network node in the dual-type qubit scheme where two types of qubits are encoded in the S and F hyperfine structure levels of 171Yb+ ions. We generate ion photon entanglement for the S-qubit in a typical timescale of hundreds of milliseconds, and verify its small crosstalk on a nearby F-qubit with coherence time above seconds. Our work demonstrates an enabling function of the dual-type qubit scheme for scalable quantum networks.

Suggested Citation

  • L. Feng & Y.-Y. Huang & Y.-K. Wu & W.-X. Guo & J.-Y. Ma & H.-X. Yang & L. Zhang & Y. Wang & C.-X. Huang & C. Zhang & L. Yao & B.-X. Qi & Y.-F. Pu & Z.-C. Zhou & L.-M. Duan, 2024. "Realization of a crosstalk-avoided quantum network node using dual-type qubits of the same ion species," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-023-44220-z
    DOI: 10.1038/s41467-023-44220-z
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    References listed on IDEAS

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    1. V. Negnevitsky & M. Marinelli & K. K. Mehta & H.-Y. Lo & C. Flühmann & J. P. Home, 2018. "Repeated multi-qubit readout and feedback with a mixed-species trapped-ion register," Nature, Nature, vol. 563(7732), pages 527-531, November.
    2. Laird Egan & Dripto M. Debroy & Crystal Noel & Andrew Risinger & Daiwei Zhu & Debopriyo Biswas & Michael Newman & Muyuan Li & Kenneth R. Brown & Marko Cetina & Christopher Monroe, 2021. "Fault-tolerant control of an error-corrected qubit," Nature, Nature, vol. 598(7880), pages 281-286, October.
    3. D. Kielpinski & C. Monroe & D. J. Wineland, 2002. "Architecture for a large-scale ion-trap quantum computer," Nature, Nature, vol. 417(6890), pages 709-711, June.
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