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Spin-cooling of the motion of a trapped diamond

Author

Listed:
  • T. Delord

    (Université PSL, CNRS, Sorbonne Université, Université de Paris)

  • P. Huillery

    (Université PSL, CNRS, Sorbonne Université, Université de Paris)

  • L. Nicolas

    (Université PSL, CNRS, Sorbonne Université, Université de Paris)

  • G. Hétet

    (Université PSL, CNRS, Sorbonne Université, Université de Paris)

Abstract

Observing and controlling macroscopic quantum systems has long been a driving force in quantum physics research. In particular, strong coupling between individual quantum systems and mechanical oscillators is being actively studied1–3. Whereas both read-out of mechanical motion using coherent control of spin systems4–9 and single-spin read-out using pristine oscillators have been demonstrated10,11, temperature control of the motion of a macroscopic object using long-lived electronic spins has not been reported. Here we observe a spin-dependent torque and spin-cooling of the motion of a trapped microdiamond. Using a combination of microwave and laser excitation enables the spins of nitrogen–vacancy centres to act on the diamond orientation and to cool the diamond libration via a dynamical back-action. Furthermore, by driving the system in the nonlinear regime, we demonstrate bistability and self-sustained coherent oscillations stimulated by spin–mechanical coupling, which offers the prospect of spin-driven generation of non-classical states of motion. Such a levitating diamond—held in position by electric field gradients under vacuum—can operate as a ‘compass’ with controlled dissipation and has potential use in high-precision torque sensing12–14, emulation of the spin-boson problem15 and probing of quantum phase transitions16. In the single-spin limit17 and using ultrapure nanoscale diamonds, it could allow quantum non-demolition read-out of the spin of nitrogen–vacancy centres at ambient conditions, deterministic entanglement between distant individual spins18 and matter-wave interferometry16,19,20.

Suggested Citation

  • T. Delord & P. Huillery & L. Nicolas & G. Hétet, 2020. "Spin-cooling of the motion of a trapped diamond," Nature, Nature, vol. 580(7801), pages 56-59, April.
  • Handle: RePEc:nat:nature:v:580:y:2020:i:7801:d:10.1038_s41586-020-2133-z
    DOI: 10.1038/s41586-020-2133-z
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    Cited by:

    1. Yuanbin Jin & Kunhong Shen & Peng Ju & Xingyu Gao & Chong Zu & Alejandro J. Grine & Tongcang Li, 2024. "Quantum control and Berry phase of electron spins in rotating levitated diamonds in high vacuum," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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