Correlation function and mutual information

DOI10.1088/1751-8113/43/44/445302zbMATH Open1209.81046arXiv1005.5064OpenAlexW1980770801MaRDI QIDQ3060114

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Publication date: 1 December 2010

Published in: (Search for Journal in Brave)

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.

Full work available at URL: https://arxiv.org/abs/1005.5064

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