中国物理B ›› 2015, Vol. 24 ›› Issue (12): 120307-120307.doi: 10.1088/1674-1056/24/12/120307

• GENERAL • 上一篇    下一篇

Free-space measurement-device-independent quantum-key-distribution protocol using decoy states with orbital angular momentum

王乐a, 赵生妹a b, 巩龙延c, 程维文a   

  1. a Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
    b Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
    c Information Physics Research Center and Department of Applied Physics, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • 收稿日期:2015-05-28 修回日期:2015-07-30 出版日期:2015-12-05 发布日期:2015-12-05
  • 通讯作者: Zhao Sheng-Mei E-mail:zhaosm@njupt.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61271238 and 61475075), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20123223110003), the Natural Science Research Foundation for Universities of Jiangsu Province of China (Grant No. 11KJA510002), the Open Research Fund of Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, China (Grant No. NYKL2015011), and the Innovation Program of Graduate Education of Jiangsu Province, China (Grant No. KYLX0810). Gong Long-Yan is partially supported by Qinglan Project of Jiangsu Province, China.

Free-space measurement-device-independent quantum-key-distribution protocol using decoy states with orbital angular momentum

Wang Le (王乐)a, Zhao Sheng-Mei (赵生妹)a b, Gong Long-Yan (巩龙延)c, Cheng Wei-Wen (程维文)a   

  1. a Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
    b Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
    c Information Physics Research Center and Department of Applied Physics, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • Received:2015-05-28 Revised:2015-07-30 Online:2015-12-05 Published:2015-12-05
  • Contact: Zhao Sheng-Mei E-mail:zhaosm@njupt.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61271238 and 61475075), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20123223110003), the Natural Science Research Foundation for Universities of Jiangsu Province of China (Grant No. 11KJA510002), the Open Research Fund of Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, China (Grant No. NYKL2015011), and the Innovation Program of Graduate Education of Jiangsu Province, China (Grant No. KYLX0810). Gong Long-Yan is partially supported by Qinglan Project of Jiangsu Province, China.

摘要:

In this paper, we propose a measurement-device-independent quantum-key-distribution (MDI-QKD) protocol using orbital angular momentum (OAM) in free space links, named the OAM-MDI-QKD protocol. In the proposed protocol, the OAM states of photons, instead of polarization states, are used as the information carriers to avoid the reference frame alignment, the decoy-state is adopted to overcome the security loophole caused by the weak coherent pulse source, and the high efficient OAM-sorter is adopted as the measurement tool for Charlie to obtain the output OAM state. Here, Charlie may be an untrusted third party. The results show that the authorized users, Alice and Bob, could distill a secret key with Charlie's successful measurements, and the key generation performance is slightly better than that of the polarization-based MDI-QKD protocol in the two-dimensional OAM cases. Simultaneously, Alice and Bob can reduce the number of flipping the bits in the secure key distillation. It is indicated that a higher key generation rate performance could be obtained by a high dimensional OAM-MDI-QKD protocol because of the unlimited degree of freedom on OAM states. Moreover, the results show that the key generation rate and the transmission distance will decrease as the growth of the strength of atmospheric turbulence (AT) and the link attenuation. In addition, the decoy states used in the proposed protocol can get a considerable good performance without the need for an ideal source.

关键词: measurement-device-independent quantum key distribution, orbital angular momentum, atmospheric turbulence, decoy states

Abstract:

In this paper, we propose a measurement-device-independent quantum-key-distribution (MDI-QKD) protocol using orbital angular momentum (OAM) in free space links, named the OAM-MDI-QKD protocol. In the proposed protocol, the OAM states of photons, instead of polarization states, are used as the information carriers to avoid the reference frame alignment, the decoy-state is adopted to overcome the security loophole caused by the weak coherent pulse source, and the high efficient OAM-sorter is adopted as the measurement tool for Charlie to obtain the output OAM state. Here, Charlie may be an untrusted third party. The results show that the authorized users, Alice and Bob, could distill a secret key with Charlie's successful measurements, and the key generation performance is slightly better than that of the polarization-based MDI-QKD protocol in the two-dimensional OAM cases. Simultaneously, Alice and Bob can reduce the number of flipping the bits in the secure key distillation. It is indicated that a higher key generation rate performance could be obtained by a high dimensional OAM-MDI-QKD protocol because of the unlimited degree of freedom on OAM states. Moreover, the results show that the key generation rate and the transmission distance will decrease as the growth of the strength of atmospheric turbulence (AT) and the link attenuation. In addition, the decoy states used in the proposed protocol can get a considerable good performance without the need for an ideal source.

Key words: measurement-device-independent quantum key distribution, orbital angular momentum, atmospheric turbulence, decoy states

中图分类号:  (Quantum communication)

  • 03.67.Hk
03.67.Dd (Quantum cryptography and communication security) 42.50.Ex (Optical implementations of quantum information processing and transfer)