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Detection of k-partite entanglement and k-nonseparability of multipartite quantum states
Physics Letters A ( IF 2.6 ) Pub Date : 2021-04-07 , DOI: 10.1016/j.physleta.2021.127347
Yan Hong , Ting Gao , Fengli Yan

Identifying the k-partite entanglement and k-nonseparability of general N-partite quantum states is a fundamental issue in quantum information theory. By use of computable inequalities of nonlinear operators, we present some simple and powerful k-partite entanglement and k-nonseparability criteria that work very well and allow for a simple and inexpensive test for the whole hierarchy of k-partite entanglement and k-nonseparability of N-partite systems with k running from N down to 2. We illustrate their strengths by considering several examples in which our criteria perform better than other known detection criteria. We are able to detect k-partite entanglement and k-nonseparability of multipartite systems which have previously not been identified. In addition, our results can be implemented in today's experiments.



中文翻译:

多粒子量子态的k-粒子纠缠和k-不分离性的检测

识别一般N粒子量子态的k粒子纠缠和k不可分离性是量子信息论中的一个基本问题。通过使用非线性算子的可计算不等式,我们提出了一些简单而有效的k粒子纠缠和k不可分离性准则,它们很好地起作用,并允许对k粒子的纠缠和k不可分离性的整个层次进行简单而廉价的测试。N个零件系统,其中kN开始运行直到2。我们通过考虑几个示例来说明它们的优势,在这些示例中我们的标准比其他已知检测标准的性能更好。我们能够检测先前尚未确定的多部分系统的k部分纠缠和k非分离性。另外,我们的结果可以在今天的实验中实现。

更新日期:2021-04-09
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