Feasibility of twin-field quantum key distribution based on multi-mode coherent phase-coded states

被引:16
|
作者
Chistiakov, V [1 ,2 ]
Kozubov, A. [1 ,2 ]
Gaidash, A. [1 ,2 ]
Gleim, A. [1 ]
Miroshnichenko, G. [1 ]
机构
[1] ITMO Univ, Fac Photon & Opt Informat Technol, St Petersburg, Russia
[2] Quanttelecom LLC, St Petersburg, Russia
关键词
SECURITY;
D O I
10.1364/OE.27.036551
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
In this paper we propose feasibility demonstration of twin-field quantum key ditribution system based on multi-mode weak coherent phase-coded states. Their utilization provides indisputable advantages described in the paper. We also provide the detailed description of nontrivial interference scheme for those states and derive detection and quantum bit error rates. Since we propose the feasibility scheme we present in this paper only asymptotic secure key estimation and show that in principle it can beat well-known fundamental limit of repeaterless quantum communications , i.e., the secret key capacity of the lossy communication channel. Also we present here the experimental setup and provide the experimental values of detection rates dependence on the modulation signals phase difference. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码:36551 / 36561
页数:11
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