Trade-Off Relations of CHSH Violations Based on Norms of Bloch Vectors
Trade-Off Relations of CHSH Violations Based on Norms of Bloch Vectors
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基于Bloch向量范数的CHSH违规的权衡关系
DOI：
10.1007/s10773-019-04064-0
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发表时间：
2019
影响因子：
1.4
通讯作者：
Shen Shuqian
中科院分区：
文献类型：
--
作者：
Wang Jing;Wang Zong;Qiao Jiahuan;Li Ming;Shen Shuqian
通过考虑布洛赫向量的范数，我们给出了任何多量子比特系统的成对量子比特系统的CHSH违反的改进权衡关系，从而限制了成对量子比特系统之间非定域性的分布。详细的例子计算表明，我们的结果改善了权衡关系秦等。（物理评论A92，062339 2015）。我们的界限由Bloch向量的范数给出。因此，该界给出了实验上可行的方法来描述任何多部分量子比特态的CHSH不等式的最大违反的权衡关系。
By considering the norms of Bloch vectors, we present an improved trade-off relation of CHSH violations of pairwise qubits systems for any multi-qubit system, which leads to restrictions on the distribution of non-locality among the pairwise qubits systems. Detailed examples are computed to show that our result improves the trade-off relation in Qin et al. (Phys. Rev. A92, 062339 2015). Our bounds are given by the norms of the Bloch vectors. Thus the bounds give experimentally feasible way in describing trade-off relation of maximal violations of CHSH inequalities for any multipartite-qubit state.