A new measure based on the tripartite information diagram is proposed for identifying quantum discord in tripartite systems. The proposed measure generalizes the mutual information underlying discord from bipartite to tripartite systems, and utilizes both one-particle and two-particle projective measurements to reveal the characteristics of the tripartite quantum discord. The feasibility of the proposedmeasure is demonstrated by evaluating the tripartite quantumdiscord for systemswith states close to Greenberger-Horne-Zeilinger,W, and biseparable states. In addition, the connections between tripartite quantum discord and two other quantum correlations-namely genuine tripartite entanglement and genuine tripartite Einstein-Podolsky-Rosen steering-are briefly discussed. The present study considers the case of quantum discord in tripartite systems. However, the proposed framework can be readily extended to general N-partite systems.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)