Improving the purity of heralded single-photon sources through spontaneous parametric down-conversion process

doi:10.1088/1674-1056/abfb5c

中国物理B ›› 2021, Vol. 30 ›› Issue (7): 70304-070304.doi: 10.1088/1674-1056/abfb5c

Improving the purity of heralded single-photon sources through spontaneous parametric down-conversion process

Jing Wang(王静)^1,2, Chun-Hui Zhang(张春辉)^1,2, Jing-Yang Liu(刘靖阳)^1,2, Xue-Rui Qian(钱雪瑞)^1,2, Jian Li(李剑)^1,2, and Qin Wang(王琴)^1,2,†

1 Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
2 Broadband Wireless Communication and Sensor Network Technology, Key Laboratory of Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

收稿日期:2021-01-14 修回日期:2021-04-04 接受日期:2021-04-26 出版日期:2021-06-22 发布日期:2021-06-24
通讯作者: Qin Wang E-mail:qinw@njupt.edu.cn
基金资助:
Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0306400 and 2017YFA0304100), the National Natural Science Foundation of China (Grant Nos. 12074194, 11774180, and U19A2075), and the Leading-edge Technology Program of Jiangsu Natural Science Foundation, China (Grant No. BK20192001).

Improving the purity of heralded single-photon sources through spontaneous parametric down-conversion process

Jing Wang(王静)^1,2, Chun-Hui Zhang(张春辉)^1,2, Jing-Yang Liu(刘靖阳)^1,2, Xue-Rui Qian(钱雪瑞)^1,2, Jian Li(李剑)^1,2, and Qin Wang(王琴)^1,2,†

1 Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
2 Broadband Wireless Communication and Sensor Network Technology, Key Laboratory of Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Received:2021-01-14 Revised:2021-04-04 Accepted:2021-04-26 Online:2021-06-22 Published:2021-06-24
Contact: Qin Wang E-mail:qinw@njupt.edu.cn
Supported by:
Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0306400 and 2017YFA0304100), the National Natural Science Foundation of China (Grant Nos. 12074194, 11774180, and U19A2075), and the Leading-edge Technology Program of Jiangsu Natural Science Foundation, China (Grant No. BK20192001).

摘要/Abstract

摘要： The high-purity single-photon source plays an important role in the field of quantum information. Usually, it is generated through spontaneous parametric down-conversion process. In this paper, we investigate and summarize a few approaches on obtaining single-photon sources with a high purity using either PPKTP or PPLN nonlinear crystals. Moreover, we present improved schemes to increase the purity based on existing work, corresponding applicable conditions and procedures are discussed and analyzed. Besides, we carry out numerical simulations and show that nearly perfect purity can be reached even without using any filters. Therefore, this work might provide valuable references for the generation and application of high purity single-photon sources.

关键词: quantum information, quantum communication, nonlinear optics

Abstract: The high-purity single-photon source plays an important role in the field of quantum information. Usually, it is generated through spontaneous parametric down-conversion process. In this paper, we investigate and summarize a few approaches on obtaining single-photon sources with a high purity using either PPKTP or PPLN nonlinear crystals. Moreover, we present improved schemes to increase the purity based on existing work, corresponding applicable conditions and procedures are discussed and analyzed. Besides, we carry out numerical simulations and show that nearly perfect purity can be reached even without using any filters. Therefore, this work might provide valuable references for the generation and application of high purity single-photon sources.

Key words: quantum information, quantum communication, nonlinear optics

中图分类号: (Quantum information)

03.67.-a

03.67.Hk (Quantum communication) 42.65.-k (Nonlinear optics)

Jing Wang(王静), Chun-Hui Zhang(张春辉), Jing-Yang Liu(刘靖阳), Xue-Rui Qian(钱雪瑞), Jian Li(李剑), and Qin Wang(王琴). Improving the purity of heralded single-photon sources through spontaneous parametric down-conversion process[J]. 中国物理B, 2021, 30(7): 70304-070304.

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Improving the purity of heralded single-photon sources through spontaneous parametric down-conversion process

Improving the purity of heralded single-photon sources through spontaneous parametric down-conversion process

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