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- W3192093033 abstract "We propose three alternative measures for non-Gaussianity of quantum states: sine distance, Bures angle, and Bures distance, which are based on quantum fidelity introduced by Wang [ Phys. Lett. A 373 58 (2008)]. Using them, we evaluate the non-Gaussianity of some relevant single-mode and two-mode non-Gaussian states and find a good consistency of the three examined measures. In addition, we show that such metrics can exactly quantify the degree of Gaussianity of even Schrödinger-cat-like states of small amplitudes that can not be measured by other known non-Gaussianity measures such as the Hilbert–Schmidt metric and the relative entropy metric. We make a comparative study between all existing non-Gaussianity measures according to the metric axioms and point out that the sine distance is the best candidate among them." @default.
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- W3192093033 date "2022-02-01" @default.
- W3192093033 modified "2023-10-14" @default.
- W3192093033 title "Alternative non-Gaussianity measures for quantum states based on quantum fidelity" @default.
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- W3192093033 doi "https://doi.org/10.1088/1674-1056/ac1928" @default.
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