论文标题

相关次要规范,纠缠检测和不和谐

Correlation Minor Norms, Entanglement Detection and Discord

论文作者

Peled, Bar Y., Te'eni, Amit, Carmi, Avishy, Cohen, Eliahu

论文摘要

在本文中,我们开发了一种检测纠缠的方法,该方法基于测量量子相关和构建相关矩阵。然后,将相关矩阵用于定义一个名为相关次要规范的参数家族,该标准可以检测纠缠。这种方法概括了可计算的交叉总体或重新调整(CCNR)标准,此外,需要测量独立于州的运营商集。此外,我们说明了一个方案,该方案可为每个相关次要规范提供最大化它的可分离状态。与其他方法相比,拟议的纠缠检测方案被认为是有利的,因为相关具有简单,直观的含义,而且可以在实验中直接测量它们。此外,证明它比CCNR标准更强。我们还说明了相关性次要规范与纯状态的纠缠熵之间的关系。最后,我们讨论了相关次要标准与量子不一致之间的关系。我们证明CMN可用于定义量子不和谐的新措施。

In this paper we develop an approach for detecting entanglement, which is based on measuring quantum correlations and constructing a correlation matrix. The correlation matrix is then used for defining a family of parameters, named Correlation Minor Norms, which allow one to detect entanglement. This approach generalizes the computable cross-norm or realignment (CCNR) criterion, and moreover requires measuring a state-independent set of operators. Furthermore, we illustrate a scheme which yields for each Correlation Minor Norm a separable state that maximizes it. The proposed entanglement detection scheme is believed to be advantageous in comparison to other methods because correlations have a simple, intuitive meaning and in addition they can be directly measured in experiment. Moreover, it is demonstrated to be stronger than the CCNR criterion. We also illustrate the relation between the Correlation Minor Norm and entanglement entropy for pure states. Finally, we discuss the relation between the Correlation Minor Norm and quantum discord. We demonstrate that the CMN may be used to define a new measure for quantum discord.

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