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Listening to quantum grains of sound

An optomechanical device has allowed quanta, or 'grains', of mechanical vibration to be counted by optical means. The system may open up new possibilities in acoustics and thermal engineering. See Letter p.522

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Figure 1: Optical phonon counting.


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Correspondence to Ivan Favero.

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Favero, I. Listening to quantum grains of sound. Nature 520, 441–442 (2015).

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