局部纠缠交换对量子随机网络鲁棒性的影响  

Influence of local entanglement swapping on quantum random networks robustness

作　　者：张万航 马雷[1] 

机构地区：[1]华东师范大学理论物理研究所,上海200241

出　　处：《量子电子学报》2015年第6期699-705,共7页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金项目资助(11174081)

摘　　要：利用纠缠渗流的方法,在量子随机网络中任意两个节点间建立远距离纠缠态,同时进行了局部纠缠交换的操作。通过此操作改变了网络中局部节点间的连接情况,也使整个网络的拓扑结构发生变化。重点探讨了局部操作对量子随机网络鲁棒性的影响,这种影响通过纠缠渗流的阈值变化情况来体现。通过理论分析和数值模拟,发现有操作时度大的节点数目明显增多,遭受随机攻击后的阈值变化也较小。这说明进行局部纠缠交换操作能够大幅度提高量子网络受到攻击后的连接鲁棒性。Entanglement percolation was used to establish long-distance entanglement between arbitrarynodes of quantum random networks. There is a local entanglement swapping operation for the network.This operation changes the local connection of the network, which also lead to the entire network topologystructure changed. The influence of local operation on quantum networks .robustness was discussed. Whenthere is operation, through theoretical analysis and numerical simulation it＇s found that the number ofthe larger degree nodes increase significantly and the threshold value changes less. It suggests that localentanglement swapping can greatly improve the quantum random networks robustness.

关 键 词：量子信息 量子随机网络 纠缠渗流 纠缠交换 鲁棒性 

分 类 号：O431.2[机械工程—光学工程]