Optimal multi-photon entanglement concentration with the photonic Faraday rotation

doi:10.1088/1674-1056/26/2/020302

中国物理B ›› 2017, Vol. 26 ›› Issue (2): 20302-020302.doi: 10.1088/1674-1056/26/2/020302

Optimal multi-photon entanglement concentration with the photonic Faraday rotation

Lan Zhou(周澜), Dan-Dan Wang(王丹丹), Xing-Fu Wang(王兴福), Shi-Pu Gu(顾世浦), Yu-Bo Sheng(盛宇波)

1 College of Mathematics & Physics, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
2 Key Laboratory of Broadband Wireless Communication and Sensor Network Technology(Ministry of Education), Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
3 College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
4 Institute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

收稿日期:2016-08-30 修回日期:2016-11-05 出版日期:2017-02-05 发布日期:2017-02-05
通讯作者: Yu-Bo Sheng E-mail:shengyb@njupt.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11474168 and 61401222), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20151502), the Qing Lan Project of Jiangsu Province, China, and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

Optimal multi-photon entanglement concentration with the photonic Faraday rotation

Lan Zhou(周澜)^1,2, Dan-Dan Wang(王丹丹)³, Xing-Fu Wang(王兴福)¹, Shi-Pu Gu(顾世浦)³, Yu-Bo Sheng(盛宇波)^2,4

1 College of Mathematics & Physics, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
2 Key Laboratory of Broadband Wireless Communication and Sensor Network Technology(Ministry of Education), Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
3 College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
4 Institute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Received:2016-08-30 Revised:2016-11-05 Online:2017-02-05 Published:2017-02-05
Contact: Yu-Bo Sheng E-mail:shengyb@njupt.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11474168 and 61401222), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20151502), the Qing Lan Project of Jiangsu Province, China, and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

摘要/Abstract

摘要： We put forward an optimal entanglement concentration protocol (ECP) for recovering an arbitrary less-entangled multi-photon Greenberger-Horne-Zeilinger (GHZ) state into the maximally entangled GHZ state based on the photonic Faraday rotation in low-quality (Q) cavity. In the ECP, only one pair of less-entangled multi-photon GHZ state and one auxiliary photon are required, and the concentration task can be realized by local operations. Moreover, our ECP can be used repeatedly to further concentrate the discarded items of conventional ECPs, which can increase its success probability largely. Under the practical imperfect detection condition, our protocol can still work with relatively high success probability. This ECP has application potential in current and future quantum communication.

关键词: quantum communication, entanglement concentration, photonic Faraday rotation, low-Q cavity

Abstract: We put forward an optimal entanglement concentration protocol (ECP) for recovering an arbitrary less-entangled multi-photon Greenberger-Horne-Zeilinger (GHZ) state into the maximally entangled GHZ state based on the photonic Faraday rotation in low-quality (Q) cavity. In the ECP, only one pair of less-entangled multi-photon GHZ state and one auxiliary photon are required, and the concentration task can be realized by local operations. Moreover, our ECP can be used repeatedly to further concentrate the discarded items of conventional ECPs, which can increase its success probability largely. Under the practical imperfect detection condition, our protocol can still work with relatively high success probability. This ECP has application potential in current and future quantum communication.

Key words: quantum communication, entanglement concentration, photonic Faraday rotation, low-Q cavity

中图分类号: (Quantum cryptography and communication security)

03.67.Dd

03.67.Hk (Quantum communication) 03.65.Ud (Entanglement and quantum nonlocality)

周澜, 王丹丹, 王兴福, 顾世浦, 盛宇波. Optimal multi-photon entanglement concentration with the photonic Faraday rotation[J]. 中国物理B, 2017, 26(2): 20302-020302.

Lan Zhou(周澜), Dan-Dan Wang(王丹丹), Xing-Fu Wang(王兴福), Shi-Pu Gu(顾世浦), Yu-Bo Sheng(盛宇波). Optimal multi-photon entanglement concentration with the photonic Faraday rotation[J]. Chin. Phys. B, 2017, 26(2): 20302-020302.

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Optimal multi-photon entanglement concentration with the photonic Faraday rotation

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