Entanglement monogamy in a three-qubit state
Entanglement monogamy in a three-qubit state
复制标题
三量子位状态下的纠缠一夫一妻制
DOI：
10.1103/physreva.78.012325
复制
发表时间：
2008-07
影响因子：
2.9
通讯作者：
Huang, Jie-Hui
中科院分区：
文献类型：
--
作者：
Zhu, Shi-Yao;Huang, Jie-Hui
我们研究了三量子比特系统中纠缠的一夫一妻性质。给出了一个单偶不等式，描述了A-B两量子比特并发CA B与AB-C三量子比特并发C AB C之间的互斥关系，它表示了量子比特A和B作为一个整体与第三个量子比特C之间的纠缠.研究发现，在三量子比特系统中，任意两个量子比特之间的纠缠受限于这两个量子比特与另一个量子比特之间的纠缠。因此，我们给出了当量子位A和C CAC之间的并发和量子位B和C CBC之间的并发都给定或两者之一时，并发CA B的上界。
We investigate the monogamy nature of entanglement in a three-qubit system. A monogamy inequality is presented to describe the exclusive relation between the A-B two-qubit concurrence CAB and the AB-C threequbit concurrence C AB C, which represents the entanglement between qubits A and B as a whole and the third qubit C. It is found that the entanglement between any two qubits in a three-qubit system is limited by the entanglement between these two qubits and another qubit. As a consequence, we present the upper bounds for the concurrence CAB, when the concurrence between qubits A and C CAC and the concurrence between qubits B and C CBC are both given or one of the two is provided.