Exploring multipartite quantum correlations with the square of quantum discord
Exploring multipartite quantum correlations with the square of quantum discord
复制标题
探索与量子不和谐平方的多部分量子相关性
DOI：
10.1103/physreva.88.012123
复制
发表时间：
2013-07-25
影响因子：
2.9
通讯作者：
Wang, Z. D.
中科院分区：
文献类型：
--
作者：
Bai, Yan-Kui;Zhang, Na;Wang, Z. D.
基于量子不和谐平方（SQD），研究了多体量子态的量子关联分布。对于三方量子系统，我们给出了SQD满足单偶关系的充要条件。特别地，我们证明了对于三比特纯态，SQD是一夫一妻的，并在此基础上引入了一个真正的三量子关联测度。此外，我们还讨论了四量子比特纯态的量子相关分布。作为一个例子，我们研究了多体腔库系统的动力学演化中的多体量子关联。
We explore the quantum correlation distribution in multipartite quantum states based on the square of quantum discord (SQD). For tripartite quantum systems, we derive the necessary and sufficient condition for the SQD to satisfy the monogamy relation. Particularly, we prove that the SQD is monogamous for three-qubit pure states, based on which a genuine tripartite quantum correlation measure is introduced. In addition, we also address the quantum correlation distributions in four-qubit pure states. As an example, we investigate multipartite quantum correlations in the dynamical evolution of multipartite cavity-reservoir systems.