Quantification of correlations in quantum many-particle systems

Details Quantification of correlations in quantum many-particle systems Quantification of correlations in quantum many-particle systems

2011-10-14

arxiv.org/abs/1110.3214v2

Phys. Rev. Lett. 108, 087004 (2012)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 3 figures; Final version including correction of typographical errors

Scientific paper

We introduce a well-defined and unbiased measure of the strength of correlations in quantum many-particle systems which is based on the relative von Neumann entropy computed from the density operator of correlated and uncorrelated states. The usefulness of this general concept is demonstrated by quantifying correlations of interacting electrons in the Hubbard model and in a series of transition-metal oxides using dynamical mean-field theory.

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