When it comes to measuring physical quantities, the more that quantum uncertainties can be squeezed the better. But when just one atom is involved, demonstrating less squeezing is the real challenge. See Letter p.623
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Carmichael, H., Orozco, L. Atom gives light a subtle squeeze. Nature 474, 584–585 (2011). https://doi.org/10.1038/474584a
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DOI: https://doi.org/10.1038/474584a
