The use of amplitude-squeezed states of light as a probe is shown to yield superior measurements of the motion of a moving mirror at low frequencies. The demonstration offers a path to improving the sensitivity of gravitational-wave detectors.
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Purdy, T. Bright squeezed light reduces back-action. Nat. Photonics 14, 1–2 (2020). https://doi.org/10.1038/s41566-019-0569-1
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DOI: https://doi.org/10.1038/s41566-019-0569-1
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