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NANOELECTROMECHANICAL SYSTEMS

# Quantum sound on a chip

### Subjects

A nanoelectromechanical system made from a nanobeam embedded in a phononic crystal and coupled to a pair of superconducting microwave oscillators can couple hypersonic sound quanta at 0.425 GHz and light quanta with high coherence.

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## References

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Aspelmeyer, M. et al. Rev. Mod. Phys. 86, 1391 (2014).

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Kalaee, M. et al. Nat. Nanotechnol. https://doi.org/10.1038/s41565-019-0377-2 (2019).

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O’Connell, A. D. et al. Nature 464, 697–703 (2010).

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Teufel, J. D. et al. Nature 471, 204–208 (2011).

5. 5.

Gambetta, J. M. et al. npj Quantum Inf. 3, 32 (2017).