Correlation function and mutual information
Quantum Physics
2015-05-19 v3
Abstract
Correlation function and mutual information are two powerful tools to characterize the correlations in a quantum state of a composite system, widely used in many-body physics and in quantum information science, respectively. We find that these two tools may give different conclusions about the order of the degrees of correlation in two specific two-qubit states. This result implies that the orderings of bipartite quantum states according to the degrees of correlation depend on which correlation measure we adopt.
Cite
@article{arxiv.1005.5064,
title = {Correlation function and mutual information},
author = {R. X. Dong and D. L. Zhou},
journal= {arXiv preprint arXiv:1005.5064},
year = {2015}
}
Comments
4.2 pages, 4 figures