Quantum correlation measure in arbitrary bipartite systems

Quantum correlation measure in arbitrary bipartite systems
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任意二分系统中的量子相关性测度

DOI:
10.1209/0295-5075/107/10007
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发表时间:
2013-09
期刊:
Europhysics Letters
影响因子:
--
通讯作者:
Song, He-Shan
Song, He-Shan
中科院分区:
其他
文献类型:
--
作者:
Wu, Shao-Xiong;Wang, Xiao-Guang;Yi, X. X.;Song, He-Shan

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利用秩一正交投影子完备集的偏斜信息,给出了任意二分量子态的量子关联的新定义。该定义不仅继承了斜信息的良好性质,包括压缩性,但也显示了强大的分析计算能力,为大范围的状态。此外,一般状态的测度可以很容易地通过成熟的近似联合对角化技术数值获得。作为比较,我们给出了许多高维态的解析和数值量子关联。分析了该测度与量子计量学的关系。
Quantum correlation with a novel definition is presented for an arbitrary bipartite quantum state in terms of the skew information of the complete set of rank-one orthogonal projectors. This definition not only inherits the good properties of skew information including the contractivity, but also shows a powerful analytic computability for a large range of states. In addition, the measure for a general state can be easily numerically obtained by the well-developed technique of the approximate joint diagonalization. As a comparison, we give both the analytic and the numerical quantum correlation for many high-dimensional states. The relation between our measure and quantum metrology is also analyzed.
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影响因子: 8.6
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