Uniform quantification of correlations for bipartite systems
Tinggui Zhang, Hong Wei Yang, Xianqing Li‐Jost, Shao-Ming Fei · Physical Review A · 2017
Based on 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, steerability, entanglement, and discord have strictly monotonic relationships. As examples, the Bell diagonal states are studied in detail.