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Ultrafast coherent control of a hole spin qubit in a germanium quantum dot

Author

Listed:
  • Ke Wang

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Gang Xu

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Fei Gao

    (Chinese Academy of Sciences)

  • He Liu

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Rong-Long Ma

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Xin Zhang

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Zhanning Wang

    (University of New South Wales)

  • Gang Cao

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Ting Wang

    (Chinese Academy of Sciences)

  • Jian-Jun Zhang

    (Chinese Academy of Sciences)

  • Dimitrie Culcer

    (University of New South Wales)

  • Xuedong Hu

    (University at Buffalo, SUNY)

  • Hong-Wen Jiang

    (University of California)

  • Hai-Ou Li

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Guang-Can Guo

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Guo-Ping Guo

    (University of Science and Technology of China
    University of Science and Technology of China
    Origin Quantum Computing Company Limited)

Abstract

Operation speed and coherence time are two core measures for the viability of a qubit. Strong spin-orbit interaction (SOI) and relatively weak hyperfine interaction make holes in germanium (Ge) intriguing candidates for spin qubits with rapid, all-electrical coherent control. Here we report ultrafast single-spin manipulation in a hole-based double quantum dot in a germanium hut wire (GHW). Mediated by the strong SOI, a Rabi frequency exceeding 540 MHz is observed at a magnetic field of 100 mT, setting a record for ultrafast spin qubit control in semiconductor systems. We demonstrate that the strong SOI of heavy holes (HHs) in our GHW, characterized by a very short spin-orbit length of 1.5 nm, enables the rapid gate operations we accomplish. Our results demonstrate the potential of ultrafast coherent control of hole spin qubits to meet the requirement of DiVincenzo’s criteria for a scalable quantum information processor.

Suggested Citation

  • Ke Wang & Gang Xu & Fei Gao & He Liu & Rong-Long Ma & Xin Zhang & Zhanning Wang & Gang Cao & Ting Wang & Jian-Jun Zhang & Dimitrie Culcer & Xuedong Hu & Hong-Wen Jiang & Hai-Ou Li & Guang-Can Guo & Gu, 2022. "Ultrafast coherent control of a hole spin qubit in a germanium quantum dot," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-021-27880-7
    DOI: 10.1038/s41467-021-27880-7
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    Cited by:

    1. W. I. L. Lawrie & M. Rimbach-Russ & F. van Riggelen & N. W. Hendrickx & S. L. de Snoo & A. Sammak & G. Scappucci & J. Helsen & M. Veldhorst, 2023. "Simultaneous single-qubit driving of semiconductor spin qubits at the fault-tolerant threshold," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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