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arXiv · 1903.09699

Spin-mechanics with levitating ferromagnetic particles

P. Huillery·T. Delord·L. Nicolas·M. Van Den Bossche·M. Perdriat·G. Hétet
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Abstract

We propose and demonstrate first steps towards schemes where the librational mode of levitating ferromagnets is strongly coupled to the electronic spin of Nitrogen-Vacancy (NV) centers in diamond. Experimentally, we levitate ferromagnets in a Paul trap and employ magnetic fields to attain oscillation frequencies in the hundreds of kHz range with Q factors close to $10^4$. These librational frequencies largely exceed the decoherence rate of NV centers in typical CVD grown diamonds offering prospects for sideband resolved operation. We also prepare and levitate composite diamond-ferromagnet particles and demonstrate both coherent spin control of the NV centers and read-out of the particle libration using the NV spin. Our results will find applications in ultra-sensitive gyroscopy and bring levitating objects a step closer to spin-mechanical experiments at the quantum level.

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P. Huillery, T. Delord, L. Nicolas, M. Van Den Bossche, M. Perdriat, G. Hétet. 2019-03-22. Spin-mechanics with levitating ferromagnetic particles. https://doi.org/10.1103/physrevb.101.134415

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