Introduction to quantum Fisher information

Details Introduction to quantum Fisher information Introduction to quantum Fisher information

2010-08-14

arxiv.org/abs/1008.2417v1

Physics

Quantum Physics

21 pages

Scientific paper

The subject of this paper is a mathematical transition from the Fisher information of classical statistics to the matrix formalism of quantum theory. If the monotonicity is the main requirement, then there are several quantum versions parametrized by a function. In physical applications the minimal is the most popular. There is a one-to-one correspondence between Fisher informations (called also monotone metrics) and abstract covariances. The skew information and the chi-square-divergence are treated here as particular cases.

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