Quantification of correlations in quantum many-particle systems
Strongly Correlated Electrons
2015-05-30 v3 Quantum Physics
Abstract
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.
Cite
@article{arxiv.1110.3214,
title = {Quantification of correlations in quantum many-particle systems},
author = {K. Byczuk and J. Kunes and W. Hofstetter and D. Vollhardt},
journal= {arXiv preprint arXiv:1110.3214},
year = {2015}
}
Comments
6 pages, 3 figures; Final version including correction of typographical errors and new reference