Quantum physics ultimately constrains how well sensors of position, speed and acceleration can perform. A hybrid quantum system that avoids these constraints could give rise to improved sensor technologies. See Letter p.191
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Baker, C., Bowen, W. Sensing past the quantum limit. Nature 547, 164–165 (2017). https://doi.org/10.1038/547164a
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DOI: https://doi.org/10.1038/547164a
