A milestone for quantum hydrodynamics may have been reached, with experiments on a black hole-like event horizon for sound waves providing strong evidence for a sonic analogue of Hawking radiation.
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Carusotto, I., Balbinot, R. Acoustic Hawking radiation. Nature Phys 12, 897–898 (2016). https://doi.org/10.1038/nphys3872
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DOI: https://doi.org/10.1038/nphys3872