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Coulomb-driven single defect engineering for scalable qubits and spin sensors in diamond

Author

Listed:
  • Tobias Lühmann

    (University Leipzig)

  • Roger John

    (University Leipzig)

  • Ralf Wunderlich

    (University Leipzig)

  • Jan Meijer

    (University Leipzig)

  • Sébastien Pezzagna

    (University Leipzig)

Abstract

Qubits based on colour centres in diamond became a prominent system for solid-state quantum information processing and sensing. But the deterministic creation of qubits and the control of their environment are still critical issues, preventing the development of a room-temperature quantum computer. We report on the high creation yield of NV centres of 75% (a tenfold enhancement) by charge-assisted defect engineering, together with an improvement of their spin coherence. The method strongly favours the formation and negative charge state of the NV centres with respect to intrinsic diamond, while it hinders the formation of competing and perturbing defects such as di-vacancies or NVH complexes. We evidence spectrally the charge state tuning of the implantation-induced vacancies from V0 to V−, key element of this Coulomb-driven engineering. The generality of the method is demonstrated using several donors (phosphorous, oxygen and sulphur) and applying it to other centres (SnV and MgV) in diamond.

Suggested Citation

  • Tobias Lühmann & Roger John & Ralf Wunderlich & Jan Meijer & Sébastien Pezzagna, 2019. "Coulomb-driven single defect engineering for scalable qubits and spin sensors in diamond," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12556-0
    DOI: 10.1038/s41467-019-12556-0
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    Cited by:

    1. Cunzhi Zhang & Francois Gygi & Giulia Galli, 2023. "Engineering the formation of spin-defects from first principles," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. Alexander Savvin & Alexander Dormidonov & Evgeniya Smetanina & Vladimir Mitrokhin & Evgeniy Lipatov & Dmitriy Genin & Sergey Potanin & Alexander Yelisseyev & Viktor Vins, 2021. "NV– diamond laser," Nature Communications, Nature, vol. 12(1), pages 1-8, December.

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