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- W2893213780 abstract "Fisher information (FI) plays a crucial role in quantum precision measurement and entanglement detection. Recently two methods have been suggested to extract it from experimental data: Hellinger distance and Kullback–Leibler entropy. In this paper, an extensive investigation is considered with the help of a dichotomic measurement model. It is found that the general quadratic fitting for FI with both methods has two constraints: one is the critical visibility V0=2∕3, the other is the smallest δθ for the dichotomic measurement. To relax them, we propose the higher-order fitting (fourth order considered), by which a reasonable FI is obtained from recent optical experimental data." @default.
- W2893213780 created "2018-10-05" @default.
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- W2893213780 date "2019-01-01" @default.
- W2893213780 modified "2023-10-01" @default.
- W2893213780 title "Reasonable method to extract Fisher information from experimental data" @default.
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- W2893213780 doi "https://doi.org/10.1016/j.physa.2018.09.118" @default.
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