Wigner-Yanase skew information vs. quantum Fisher information

Luo, Shunlong

doi:10.1090/S0002-9939-03-07175-2

Wigner-Yanase skew information vs. quantum Fisher information
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Proc. Amer. Math. Soc. 132 (2004), 885-890 Request permission

Abstract:

Among concepts describing the information contents of quantum mechanical density operators, both the Wigner-Yanase skew information and the quantum Fisher information defined via symmetric logarithmic derivatives are natural generalizations of the classical Fisher information. We will establish a relationship between these two fundamental quantities and show that they are comparable.

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