Light is an excellent tool for making precise measurements of objects, but can sometimes alter or damage a sensitive sample. Researchers have now shown that entanglement and quantum-correlated light can be used to help alleviate this problem.
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Pryde, G. A gentle touch. Nature Photon 7, 8–9 (2013). https://doi.org/10.1038/nphoton.2012.333
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DOI: https://doi.org/10.1038/nphoton.2012.333