Multi-copy entanglement purification with practical spontaneous parametric down conversion sources

doi:10.1088/1674-1056/26/6/060307

中国物理B ›› 2017, Vol. 26 ›› Issue (6): 60307-060307.doi: 10.1088/1674-1056/26/6/060307

Multi-copy entanglement purification with practical spontaneous parametric down conversion sources

Shuai-Shuai Zhang(张帅帅), Qi Shu(祁舒), Lan Zhou(周澜), Yu-Bo Sheng(盛宇波)

1 Key Laboratory of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
2 College of Mathematics & Physics, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
3 Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

收稿日期:2017-01-11 修回日期:2017-02-08 出版日期:2017-06-05 发布日期:2017-06-05
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 in Jiangsu Province, China, and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, China.

Multi-copy entanglement purification with practical spontaneous parametric down conversion sources

Shuai-Shuai Zhang(张帅帅)^1,3, Qi Shu(祁舒)^1,3, Lan Zhou(周澜)², Yu-Bo Sheng(盛宇波)¹

1 Key Laboratory of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
2 College of Mathematics & Physics, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
3 Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Received:2017-01-11 Revised:2017-02-08 Online:2017-06-05 Published:2017-06-05
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 in Jiangsu Province, China, and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, China.

摘要/Abstract

摘要： Entanglement purification is to distill the high quality entanglement from the low quality entanglement with local operations and classical communications. It is one of the key technologies in long-distance quantum communication. We discuss an entanglement purification protocol (EPP) with spontaneous parametric down conversion (SPDC) sources, in contrast to previous EPP with multi-copy mixed states, which requires ideal entanglement sources. We show that the SPDC source is not an obstacle for purification, but can benefit the fidelity of the purified mixed state. This EPP works for linear optics and is feasible in current experiment technology.

关键词: quantum communication, entanglement, entanglement purification

Abstract: Entanglement purification is to distill the high quality entanglement from the low quality entanglement with local operations and classical communications. It is one of the key technologies in long-distance quantum communication. We discuss an entanglement purification protocol (EPP) with spontaneous parametric down conversion (SPDC) sources, in contrast to previous EPP with multi-copy mixed states, which requires ideal entanglement sources. We show that the SPDC source is not an obstacle for purification, but can benefit the fidelity of the purified mixed state. This EPP works for linear optics and is feasible in current experiment technology.

Key words: quantum communication, entanglement, entanglement purification

中图分类号: (Quantum communication)

03.67.Hk

03.65.Ud (Entanglement and quantum nonlocality) 03.67.Lx (Quantum computation architectures and implementations)

张帅帅, 祁舒, 周澜, 盛宇波. Multi-copy entanglement purification with practical spontaneous parametric down conversion sources[J]. 中国物理B, 2017, 26(6): 60307-060307.

Shuai-Shuai Zhang(张帅帅), Qi Shu(祁舒), Lan Zhou(周澜), Yu-Bo Sheng(盛宇波). Multi-copy entanglement purification with practical spontaneous parametric down conversion sources[J]. Chin. Phys. B, 2017, 26(6): 60307-060307.

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Multi-copy entanglement purification with practical spontaneous parametric down conversion sources

Multi-copy entanglement purification with practical spontaneous parametric down conversion sources

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