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Approaching a fully-polarized state of nuclear spins in a solid

Author

Listed:
  • Peter Millington-Hotze

    (University of Sheffield)

  • Harry E. Dyte

    (University of Sheffield)

  • Santanu Manna

    (Johannes Kepler University Linz
    Indian Institute of Technology Delhi)

  • Saimon F. Covre da Silva

    (Johannes Kepler University Linz)

  • Armando Rastelli

    (Johannes Kepler University Linz)

  • Evgeny A. Chekhovich

    (University of Sheffield)

Abstract

Magnetic noise of atomic nuclear spins is a major source of decoherence in solid-state spin qubits. In theory, near-unity nuclear spin polarization can eliminate decoherence of the electron spin qubit, while turning the nuclei into a useful quantum information resource. However, achieving sufficiently high nuclear polarizations has remained an evasive goal. Here we implement a nuclear spin polarization protocol which combines strong optical pumping and fast electron tunneling. Nuclear polarizations well above 95% are generated in GaAs semiconductor quantum dots on a timescale of 1 minute. The technique is compatible with standard quantum dot device designs, where highly-polarized nuclear spins can simplify implementations of qubits and quantum memories, as well as offer a testbed for studies of many-body quantum dynamics and magnetism.

Suggested Citation

  • Peter Millington-Hotze & Harry E. Dyte & Santanu Manna & Saimon F. Covre da Silva & Armando Rastelli & Evgeny A. Chekhovich, 2024. "Approaching a fully-polarized state of nuclear spins in a solid," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45364-2
    DOI: 10.1038/s41467-024-45364-2
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    References listed on IDEAS

    as
    1. Xueyong Yuan & Fritz Weyhausen-Brinkmann & Javier Martín-Sánchez & Giovanni Piredda & Vlastimil Křápek & Yongheng Huo & Huiying Huang & Christian Schimpf & Oliver G. Schmidt & Johannes Edlinger & Gabr, 2018. "Uniaxial stress flips the natural quantization axis of a quantum dot for integrated quantum photonics," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    2. R. J. Warburton & C. Schäflein & D. Haft & F. Bickel & A. Lorke & K. Karrai & J. M. Garcia & W. Schoenfeld & P. M. Petroff, 2000. "Optical emission from a charge-tunable quantum ring," Nature, Nature, vol. 405(6789), pages 926-929, June.
    3. Peter Millington-Hotze & Santanu Manna & Saimon F. Covre da Silva & Armando Rastelli & Evgeny A. Chekhovich, 2023. "Nuclear spin diffusion in the central spin system of a GaAs/AlGaAs quantum dot," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
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