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- W2003165743 abstract "The relative entropy of a correlated state and an uncorrelated reference state is a reasonable measure for the degree of correlations. A key question is, however, which uncorrelated state to compare to. The relative entropy becomes minimal for the uncorrelated reference state that has the same one-particle density matrix as the correlated state. Hence, this particular measure, coined nonfreeness, is unique and reasonable. We demonstrate that for relevant physical situations, such as finite temperatures or a correlation enhanced orbital splitting, other choices of the uncorrelated state, even educated guesses, overestimate correlations." @default.
- W2003165743 created "2016-06-24" @default.
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- W2003165743 date "2013-07-01" @default.
- W2003165743 modified "2023-09-23" @default.
- W2003165743 title "Physics behind the minimum of relative entropy measures for correlations" @default.
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- W2003165743 doi "https://doi.org/10.1140/epjb/e2013-40424-5" @default.
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