On super quantum discord for high-dimensional bipartite state

被引：0
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作者：
Jianming Zhou
Xiaoli Hu
Naihuan Jing
机构：
[1] Shanghai University,Department of Mathematics
[2] Jianghan University,School of Artificial Intelligence
[3] North Carolina State University,Department of Mathematics
来源：
Quantum Information Processing | / 22卷
关键词：
Super quantum discord; Quantum correlations; Bipartite states; Primary 81P40; Secondary 81Qxx;
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摘要：
By quantifying the difference between quantum mutual information through weak measurement performed on a subsystem one is led to the notion of super quantum discord. The super version is also known to be difficult to compute as the quantum discord which was captured by the projective (strong) measurements. In this paper, we give effective bounds of the super quantum discord with or without phase damping channels for higher-dimensional bipartite quantum states, and found that the super version is always larger than the usual quantum discord as in the 2-dimensional case.
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