Uniform Quantification of Correlations for Bipartite Systems

Ting-Gui Zhang, Hong Yang, Xianqing Li-Jost, and Shao-Ming Fei

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Submission date: 15. Feb. 2017
Pages: 6
published in: Physical review / A, 95 (2017) 4, art-no. 042316 
DOI number (of the published article): 10.1103/PhysRevA.95.042316
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Abstract:
Based on the relative entropy, we give a unified characterization of quantum correlations for nonlocality, steerability, discord and entanglement for any bipartite quantum states. For two-qubit states we show that the quantities obtained from quantifying nonlocality, steerabiity, entanglement and discord have strictly monotonic relationship. As for examples, the Bell diagonal states are studied in detail.