Non-classicalities via perturbing local unitary operations

Non-classicalities via perturbing local unitary operations
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通过扰动局部酉运算实现非经典性

DOI:
10.1140/epjd/e2013-40336-6
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发表时间:
2013-10
影响因子:
1.8
通讯作者:
Yu Chang-shui
Yu Chang-shui
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Zhang Jun;Zhang Yang;Wu Shao-xiong;Yu Chang-shui

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利用摄动局部幺正运算方法研究了双量子位态的非经典相关。我们发现,量子失谐(QD)、测量诱导非定域性(MIN)等各种非经典性的定义在表示为局部酉操作的扰动时通常没有唯一的定义,因此给定的非经典性可以导致其对偶非经典性的不同定义。此外,还证明了QD和MIN不是简单酉运算集合中对应的对偶表达式,尽管它们在它们的原始定义中是对偶表达式。此外,我们还考虑了一般2⊗d维系统的非经典性。
We study the nonclassical correlations in a two-qubit state by the perturbing local unitary operation method. We find that the definitions of various non-classicalities including quantum discord (QD), measurement-induced nonlocality (MIN) and so on usually do not have a unique definition when expressed as the perturbation of local unitary operations, so a given non-classicality can lead to different definitions of its dual non-classicality. In addition, it is shown that QD and MIN are not the corresponding dual expressions in a simple set of unitary operations, even though they are in their original definitions. In addition, we also consider the non-classicalities in general 2 ⊗ddimensional systems.
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