Two-step entanglement concentration for arbitrary electronic cluster state

被引:27
|
作者
Zhao, Sheng-Yang [1 ,2 ]
Liu, Jiong [1 ,2 ]
Zhou, Lan [1 ,3 ]
Sheng, Yu-Bo [1 ,2 ]
机构
[1] Nanjing Univ Posts & Telecommun, Minist Educ, Key Lab Broadband Wireless Commun & Sensor Networ, Nanjing 210003, Peoples R China
[2] Inst Signal Proc Transmiss, Nanjing 210003, Peoples R China
[3] Nanjing Univ Posts & Telecommun, Coll Math & Phys, Nanjing 210003, Peoples R China
基金
中国国家自然科学基金;
关键词
QUANTUM-DOT; PURIFICATION; SPIN;
D O I
10.1007/s11128-013-0623-8
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We present an efficient protocol for concentrating an arbitrary four-electron less-entangled cluster state into a maximally entangled cluster state. As a two-step entanglement concentration protocol (ECP), it only needs one pair of less-entangled cluster state, which makes this ECP more economical. With the help of electronic polarization beam splitter (PBS) and the charge detection, the whole concentration process is essentially the quantum nondemolition (QND) measurement. Therefore, the concentrated maximally entangled state can be remained for further application. Moreover, the discarded terms in some traditional ECPs can be reused to obtain a high success probability. It is feasible and useful in current one-way quantum computation.
引用
收藏
页码:3633 / 3647
页数:15
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