Mechanical oscillations of microscopic resonators have recently been observed in the quantum regime. This idea could soon be extended from localized vibrations to travelling waves thanks to a sensitive probe of so-called surface acoustic waves.
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Clerk, A. To see a SAW. Nature Phys 8, 256–257 (2012). https://doi.org/10.1038/nphys2243
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DOI: https://doi.org/10.1038/nphys2243
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