Journal
PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY
Volume 132, Issue 3, Pages 885-890Publisher
AMER MATHEMATICAL SOC
DOI: 10.1090/S0002-9939-03-07175-2
Keywords
Fisher information; density operators; von Neumann-Landau equation; skew information; quantum Fisher information
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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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