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Vanessa Wachter1,2, Silvia Viola Kusminskiy2,3, Gabriel Hétet4

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Researchers propose using spinning nanodiamonds with nitrogen-vacancy spins as quantum rotors. This platform could reveal quantum spin-rotation coupling, enabling new superposition experiments with massive objects.

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Area of Science:

  • Quantum physics
  • Nanotechnology
  • Spin dynamics

Background:

  • Recent experiments show all-electric spinning of levitated nanodiamonds with embedded nitrogen-vacancy spins.
  • Gyroscopically stabilized spin rotors are emerging as a novel platform in quantum science.

Purpose of the Study:

  • To investigate the potential of quantum spin rotors for probing and exploiting quantum spin-rotation coupling.
  • To devise experimental protocols for observing spin-rotation coupling in state-of-the-art experiments.

Main Methods:

  • Derivation of the effective Hamiltonian for spin-rotation coupling in quantum rotors.
  • Utilizing Einstein-de Haas and Barnett effects to describe the interaction.
  • Proposing experimental protocols for observation.

Main Results:

  • The study theoretically describes how an embedded spin influences the rotation of quantum rotors.
  • The derived Hamiltonian quantifies the spin-rotation coupling effects.
  • Experimental protocols are proposed for observing these effects.

Conclusions:

  • Quantum spin rotors, specifically nanodiamonds with nitrogen-vacancy spins, offer a promising platform for fundamental quantum studies.
  • This research paves the way for future exploitation of quantum spin rotors in superposition experiments with massive objects.