Control of distributed interference in the one-way quantum cryptography system
- 作者: Balygin K.A.1, Klimov A.N.1,2, Kulik S.P.1, Molotkov S.N.3,4,5
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隶属关系:
- Faculty of Physics
- Prokhorov General Physics Institute
- Institute of Solid State Physics
- Academy of Cryptography of the Russian Federation
- Faculty of Computational Mathematics and Cybernetics
- 期: 卷 106, 编号 2 (2017)
- 页面: 120-126
- 栏目: Quantum Informatics
- URL: https://journals.rcsi.science/0021-3640/article/view/160451
- DOI: https://doi.org/10.1134/S0021364017140041
- ID: 160451
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详细
The possibility of controlling interference in two spaced fiber Mach–Zehnder interferometers and maintaining a nearly ideal visibility has been demonstrated for the one-way quantum cryptography system directly in the key distribution process through a communication channel with a length of 50 km. It has been shown that the deviation of the visibility from ideal is certainly due to the detected difference between the numbers of 0’s and 1’s in the raw (sifted) key. For this reason, an interferometer can be balanced only in the quasi-singlephoton mode without the interruption of the process of key distribution by using the difference between the numbers of 0’s and 1’s in the raw key as an indicator of an error. The proposed approach reduces the balancing time and, furthermore, does not require additional exchanges through an open communication channel.
作者简介
K. Balygin
Faculty of Physics
Email: sergei.kulik@physics.msu.ru
俄罗斯联邦, Moscow, 119991
A. Klimov
Faculty of Physics; Prokhorov General Physics Institute
Email: sergei.kulik@physics.msu.ru
俄罗斯联邦, Moscow, 119991; Moscow, 119991
S. Kulik
Faculty of Physics
编辑信件的主要联系方式.
Email: sergei.kulik@physics.msu.ru
俄罗斯联邦, Moscow, 119991
S. Molotkov
Institute of Solid State Physics; Academy of Cryptography of the Russian Federation; Faculty of Computational Mathematics and Cybernetics
Email: sergei.kulik@physics.msu.ru
俄罗斯联邦, Chernogolovka, Moscow region, 142432; Moscow, 121552; Moscow, 119991
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