Efficient single-photon entanglement concentration for quantum communications

被引：15
|
作者：
Zhou, Lan [1 ,2 ]
Sheng, Yu-Bo [2 ,3 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Coll Math & Phys, Nanjing 210003, Peoples R China
[2] Nanjing Univ Posts & Telecommun, Key Lab Broadband Wireless Commun & Sensor Networ, Minist Educ, Nanjing 210003, Peoples R China
[3] Nanjing Univ Posts & Telecommun, Inst Signal Proc Transmiss, Nanjing 210003, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2014年 / 313卷
基金：
中国国家自然科学基金;
关键词：
Quantum communication; Single-photon entanglement; Entanglement concentration; KERR NONLINEARITY; BELL THEOREM; CRYPTOGRAPHY; STATE; PURIFICATION; COMPUTATION; OPTICS; SYSTEM;
D O I：
10.1016/j.optcom.2013.10.041
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present two entanglement concentration protocols for single-photon entanglement. The first protocol is implemented with linear optics. With the help of the 50:50 beam splitter, variable beam splitter and an auxiliary photon, a less-entangled single-photon state can be concentrated into a maximally single-photon entangled state with some probability. The second protocol is implemented with the cross-Kerr nonlinearity. With the help of the cross-Kerr nonlinearity, the sophisticated single photon detector is not required. Moreover, the second protocol can be reused to get higher success probability. All these advantages may make the protocols useful in the long-distance quantum communication. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：217 / 222
页数：6
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