Multi-protocol quantum key distribution decoding chip

doi:10.1088/1674-1056/adb686

中国物理B ›› 2025, Vol. 34 ›› Issue (5): 50303-050303.doi: 10.1088/1674-1056/adb686

所属专题： SPECIAL TOPIC — Quantum communication and quantum network

Multi-protocol quantum key distribution decoding chip

Chun-Xue Zhang(张春雪)^1,3, Jian-Guang Li(李建光)¹, Yue Wang(王玥)¹, Wei Chen(陈巍)⁴, Jia-Shun Zhang(张家顺)^1,2,3,†, and Jun-Ming An(安俊明)^1,2,3,‡

1 Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
3 College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
4 Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China

收稿日期:2024-12-05 修回日期:2025-02-12 接受日期:2025-02-17 出版日期:2025-05-15 发布日期:2025-04-24
通讯作者: Jia-Shun Zhang, Jun-Ming An E-mail:zhangjiashun@semi.ac.cn;junming@semi.ac.cn
基金资助:
Project supported by the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0300701), the National Key Research and Development Program of China (Grant No. 2018YFA0306403), and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB43000000).

Multi-protocol quantum key distribution decoding chip

Chun-Xue Zhang(张春雪)^1,3, Jian-Guang Li(李建光)¹, Yue Wang(王玥)¹, Wei Chen(陈巍)⁴, Jia-Shun Zhang(张家顺)^1,2,3,†, and Jun-Ming An(安俊明)^1,2,3,‡

1 Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
3 College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
4 Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China

Received:2024-12-05 Revised:2025-02-12 Accepted:2025-02-17 Online:2025-05-15 Published:2025-04-24
Contact: Jia-Shun Zhang, Jun-Ming An E-mail:zhangjiashun@semi.ac.cn;junming@semi.ac.cn
Supported by:
Project supported by the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0300701), the National Key Research and Development Program of China (Grant No. 2018YFA0306403), and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB43000000).

摘要/Abstract

摘要： Quantum key distribution (QKD) is a method for secure communication that utilizes quantum mechanics principles to distribute cryptographic keys between parties. Integrated photonics offer benefits such as compactness, scalability, energy efficiency and the potential for extensive integration. We have achieved BB84 phase encoding and decoding, time-bin phase QKD, and the coherent one-way (COW) protocol on a planar lightwave circuit (PLC) platform. At the optimal temperature, our chip successfully prepared quantum states, performed decoding and calculated the secure key rate of the time-bin phase-decoding QKD to be 80.46 kbps over a 20 km transmission with a quantum bit error rate (QBER) of 4.23%. The secure key rate of the COW protocol was 18.18 kbps, with a phase error rate of 3.627% and a time error rate of 0.377%. The uniqueness of this technology lies in its combination of high integration and protocol flexibility, providing an innovative solution for the development of future quantum communication networks.

关键词: quantum key distribution (QKD), secure key rate, decoding chip, quantum bit error rate

Abstract: Quantum key distribution (QKD) is a method for secure communication that utilizes quantum mechanics principles to distribute cryptographic keys between parties. Integrated photonics offer benefits such as compactness, scalability, energy efficiency and the potential for extensive integration. We have achieved BB84 phase encoding and decoding, time-bin phase QKD, and the coherent one-way (COW) protocol on a planar lightwave circuit (PLC) platform. At the optimal temperature, our chip successfully prepared quantum states, performed decoding and calculated the secure key rate of the time-bin phase-decoding QKD to be 80.46 kbps over a 20 km transmission with a quantum bit error rate (QBER) of 4.23%. The secure key rate of the COW protocol was 18.18 kbps, with a phase error rate of 3.627% and a time error rate of 0.377%. The uniqueness of this technology lies in its combination of high integration and protocol flexibility, providing an innovative solution for the development of future quantum communication networks.

Key words: quantum key distribution (QKD), secure key rate, decoding chip, quantum bit error rate

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

03.67.Dd

42.82.Et (Waveguides, couplers, and arrays) 42.82.Bq (Design and performance testing of integrated-optical systems) 03.67.Hk (Quantum communication)

Chun-Xue Zhang(张春雪), Jian-Guang Li(李建光), Yue Wang(王玥), Wei Chen(陈巍), Jia-Shun Zhang(张家顺), and Jun-Ming An(安俊明). Multi-protocol quantum key distribution decoding chip[J]. 中国物理B, 2025, 34(5): 50303-050303.

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Multi-protocol quantum key distribution decoding chip

Multi-protocol quantum key distribution decoding chip

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