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Nat Commun. 2014 Jul 18;5:4429. doi: 10.1038/ncomms5429.

Dynamic strain-mediated coupling of a single diamond spin to a mechanical resonator.

Author information

1
1] Department of Physics, University of California Santa Barbara, Broida Hall, Santa Barbara, California 93106, USA [2].
2
Department of Physics, University of California Santa Barbara, Broida Hall, Santa Barbara, California 93106, USA.

Abstract

The development of hybrid quantum systems is central to the advancement of emerging quantum technologies, including quantum information science and quantum-assisted sensing. The recent demonstration of high-quality single-crystal diamond resonators has led to significant interest in a hybrid system consisting of nitrogen-vacancy centre spins that interact with the resonant phonon modes of a macroscopic mechanical resonator through crystal strain. However, the nitrogen-vacancy spin-strain interaction has not been well characterized. Here, we demonstrate dynamic, strain-mediated coupling of the mechanical motion of a diamond cantilever to the spin of an embedded nitrogen-vacancy centre. Via quantum control of the spin, we quantitatively characterize the axial and transverse strain sensitivities of the nitrogen-vacancy ground-state spin. The nitrogen-vacancy centre is an atomic scale sensor and we demonstrate spin-based strain imaging with a strain sensitivity of 3 × 10(-6) strain Hz(-1/2). Finally, we show how this spin-resonator system could enable coherent spin-phonon interactions in the quantum regime.

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