Signal estimation and coherence
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Publication date
2021
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Optical Society of America
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Abstract
We address the relation between quantum metrological resolution and quantum coherence. We develop a quantum version of the Wiener-Khintchine theorem for a suitable model of a quantum ruler, putting the contributions of the probe and measurement on equal footing. We illustrate this approach with several examples of linear metrology.
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© 2021 Optical Society of America.
L. A. and A. L. acknowledge financial support from Spanish Ministerio de EconomÃa y Competitividad Project No. FIS2016-75199-P. L. A. acknowledges financial support from European Social Fund and the Spanish Ministerio de Ciencia Innovación y Universidades, Contract Grant No. BES-2017-081942. We thank Dr. J. Rubio for continuous support and helpful comments.