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- W2529079799 abstract "We introduce spatial deformations to an array of light sources and study how the estimation precision of the interspacing distance, d, changes with the sources of light used. The quantum Fisher information (QFI) is used as the figure of merit in this work to quantify the amount of information we have on the estimation parameter. We derive the generator of translations, G, in d due to an arbitrary homogeneous deformation applied to the array. We show how the variance of the generator can be used to easily consider how different deformations and light sources can effect the estimation precision. The single parameter estimation problem is applied to the array and we report on the optimal state that maximises the QFI for d. Contrary to what may have been expected, the higher average mode occupancies of the classical states performs better in estimating d when compared with single photon emitters (SPEs). The optimal entangled state is constructed from the eigenvectors of the generator and found to outperform all these states. We also find the existence of multiple optimal estimators for the measurement of d. Our results find applications in evaluating stresses and strains, fracture prevention in materials expressing great sensitivities to deformations, and selecting frequency distinguished quantum sources from an array of reference sources." @default.
- W2529079799 created "2016-10-14" @default.
- W2529079799 creator A5085700356 @default.
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- W2529079799 date "2017-06-20" @default.
- W2529079799 modified "2023-09-27" @default.
- W2529079799 title "Quantum metrology of spatial deformation using arrays of classical and quantum light emitters" @default.
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- W2529079799 doi "https://doi.org/10.1103/physreva.95.063829" @default.
- W2529079799 hasPublicationYear "2017" @default.
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