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The squeezed dark nuclear spin state in lead halide perovskites

Author

Listed:
  • E. Kirstein

    (TU Dortmund)

  • D. S. Smirnov

    (Ioffe Institute)

  • E. A. Zhukov

    (TU Dortmund)

  • D. R. Yakovlev

    (TU Dortmund)

  • N. E. Kopteva

    (TU Dortmund)

  • D. N. Dirin

    (ETH Zürich)

  • O. Hordiichuk

    (ETH Zürich
    Empa - Swiss Federal Laboratories for Materials Science and Technology)

  • M. V. Kovalenko

    (ETH Zürich
    Empa - Swiss Federal Laboratories for Materials Science and Technology)

  • M. Bayer

    (TU Dortmund)

Abstract

Coherent many-body states are highly promising for robust quantum information processing. While far-reaching theoretical predictions have been made for various implementations, direct experimental evidence of their appealing properties can be challenging. Here, we demonstrate optical manipulation of the nuclear spin ensemble in the lead halide perovskite semiconductor FAPbBr3 (FA = formamidinium), targeting a long-postulated collective dark state that is insensitive to optical pumping after its build-up. Via optical orientation of localized hole spins we drive the nuclear many-body system into this entangled state, requiring a weak magnetic field of only a few milli-Tesla strength at cryogenic temperatures. During its fast establishment, the nuclear polarization along the optical axis remains small, while the transverse nuclear spin fluctuations are strongly reduced, corresponding to spin squeezing as evidenced by a strong violation of the generalized nuclear squeezing-inequality with ξs

Suggested Citation

  • E. Kirstein & D. S. Smirnov & E. A. Zhukov & D. R. Yakovlev & N. E. Kopteva & D. N. Dirin & O. Hordiichuk & M. V. Kovalenko & M. Bayer, 2023. "The squeezed dark nuclear spin state in lead halide perovskites," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42265-8
    DOI: 10.1038/s41467-023-42265-8
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    References listed on IDEAS

    as
    1. E. Togan & Y. Chu & A. Imamoglu & M. D. Lukin, 2011. "Laser cooling and real-time measurement of the nuclear spin environment of a solid-state qubit," Nature, Nature, vol. 478(7370), pages 497-501, October.
    2. Andrei Ruskuc & Chun-Ju Wu & Jake Rochman & Joonhee Choi & Andrei Faraon, 2022. "Nuclear spin-wave quantum register for a solid-state qubit," Nature, Nature, vol. 602(7897), pages 408-413, February.
    3. Vasilii V. Belykh & Dmitri R. Yakovlev & Mikhail M. Glazov & Philipp S. Grigoryev & Mujtaba Hussain & Janina Rautert & Dmitry N. Dirin & Maksym V. Kovalenko & Manfred Bayer, 2019. "Coherent spin dynamics of electrons and holes in CsPbBr3 perovskite crystals," Nature Communications, Nature, vol. 10(1), pages 1-6, December.
    4. Vasilii V. Belykh & Dmitri R. Yakovlev & Mikhail M. Glazov & Philipp S. Grigoryev & Mujtaba Hussain & Janina Rautert & Dmitry N. Dirin & Maksym V. Kovalenko & Manfred Bayer, 2019. "Author Correction: Coherent spin dynamics of electrons and holes in CsPbBr3 perovskite crystals," Nature Communications, Nature, vol. 10(1), pages 1-1, December.
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