Entanglement concentration for a non-maximally entangled four-photon cluster state

被引：9
|
作者：
Yan, Xiang [1 ]
Yu, Ya-Fei [1 ]
Zhang, Zhi-Ming [1 ]
机构：
[1] S China Normal Univ, Lab Nanophoton Funct Mat & Devices SIPSE, Lab Quantum Engn & Quantum Mat, Guangzhou 510006, Guangdong, Peoples R China
来源：
FRONTIERS OF PHYSICS | 2014年 / 9卷 / 05期
基金：
中国国家自然科学基金;
关键词：
cluster state; entanglement concentration; controlled-NOT gate; DISTILLATION; SCHEME; PURIFICATION;
D O I：
10.1007/s11467-014-0435-z
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present a scheme for locally concentrating a non-maximally entangled four-photon cluster state into a maximally-entangled four-photon cluster state. This scheme has a high success probability. The controlled-NOT (CNOT) gate is a crucial ingredient in this scheme, and we use a nearly deterministic CNOT gate, which is similar with that first introduced by Nemoto et al. (Phys. Rev. Lett., 2004, 93: 250502). This CNOT gate has a simple structure and does not need the strong nonlinearity.
引用
收藏
页码：640 / 645
页数：6
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