Quantum Nonlocality of Arbitrary Dimensional Bipartite States.
Quantum Nonlocality of Arbitrary Dimensional Bipartite States.
复制标题
任意维二分态的量子非局域性
DOI：
10.1038/srep13358
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发表时间：
2015-08-25
影响因子：
4.6
通讯作者：
Li-Jost X
中科院分区：
文献类型：
--
作者：
Li M;Zhang T;Hua B;Fei SM;Li-Jost X
我们研究了任意维二体量子态的非局域性。通过计算一组多重Bell不等式的最大违犯，得到了一般两量子比特态的一个解析和可计算的下界。这个界给出了两量子比特态不允许局部隐变量模型存在的必要条件。结果表明，在判断某些量子态的非局域性时，该下界比CHSH不等式的下界要好。将结果推广到高维量子态的情形，给出了检测非局域性的一个充分条件。
We study the nonlocality of arbitrary dimensional bipartite quantum states. By computing the maximal violation of a set of multi-setting Bell inequalities, an analytical and computable lower bound has been derived for general two-qubit states. This bound gives the necessary condition that a two-qubit state admits no local hidden variable models. The lower bound is shown to be better than that from the CHSH inequality in judging the nonlocality of some quantum states. The results are generalized to the case of high dimensional quantum states, and a sufficient condition for detecting the non-locality has been presented.