Quantum enhanced estimation of optical detector efficiencies

M. Barbieri, A. Datta, T.J. Bartley, X.-M. Jin, W.S. Kolthammer, I.A. Walmsley, Quantum Measurements and Quantum Metrology (2016).

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<jats:title>Abstract</jats:title><jats:p>Quantum mechanics establishes the ultimate limit to the scaling of the precision on any parameter, by identifying optimal probe states and measurements. While this paradigm is, at least in principle, adequate for the metrology of quantum channels involving the estimation of phase and loss parameters, we show that estimating the loss parameters associated with a quantum channel and a realistic quantum detector are fundamentally different. While Fock states are provably optimal for the former, we identify a crossover in the nature of the optimal probe state for estimating detector imperfections as a function of the loss parameter using Fisher information as a benchmark. We provide theoretical results for on-off and homodyne detectors, the most widely used detectors in quantum photonics technologies, when using Fock states and coherent states as probes.</jats:p>
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Quantum Measurements and Quantum Metrology
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Barbieri M, Datta A, Bartley TJ, Jin X-M, Kolthammer WS, Walmsley IA. Quantum enhanced estimation of optical detector efficiencies. Quantum Measurements and Quantum Metrology. 2016. doi:10.1515/qmetro-2016-0002
Barbieri, M., Datta, A., Bartley, T. J., Jin, X.-M., Kolthammer, W. S., & Walmsley, I. A. (2016). Quantum enhanced estimation of optical detector efficiencies. Quantum Measurements and Quantum Metrology. https://doi.org/10.1515/qmetro-2016-0002
@article{Barbieri_Datta_Bartley_Jin_Kolthammer_Walmsley_2016, title={Quantum enhanced estimation of optical detector efficiencies}, DOI={10.1515/qmetro-2016-0002}, journal={Quantum Measurements and Quantum Metrology}, author={Barbieri, Marco and Datta, Animesh and Bartley, Tim J. and Jin, Xian-Min and Kolthammer, W. Steven and Walmsley, Ian A.}, year={2016} }
Barbieri, Marco, Animesh Datta, Tim J. Bartley, Xian-Min Jin, W. Steven Kolthammer, and Ian A. Walmsley. “Quantum Enhanced Estimation of Optical Detector Efficiencies.” Quantum Measurements and Quantum Metrology, 2016. https://doi.org/10.1515/qmetro-2016-0002.
M. Barbieri, A. Datta, T. J. Bartley, X.-M. Jin, W. S. Kolthammer, and I. A. Walmsley, “Quantum enhanced estimation of optical detector efficiencies,” Quantum Measurements and Quantum Metrology, 2016.
Barbieri, Marco, et al. “Quantum Enhanced Estimation of Optical Detector Efficiencies.” Quantum Measurements and Quantum Metrology, 2016, doi:10.1515/qmetro-2016-0002.

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