Performance Improvement of Plug-and-Play Dual-Phase-Modulated Quantum Key Distribution by Using a Noiseless Amplifier

被引:12
|
作者
Bai, Dongyun [1 ]
Huang, Peng [1 ]
Ma, Hongxin [1 ]
Wang, Tao [1 ]
Zeng, Guihua [1 ]
机构
[1] Shanghai Jiao Tong Univ, Dept Elect Engn, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China
来源
ENTROPY | 2017年 / 19卷 / 10期
基金
中国国家自然科学基金;
关键词
plug-and-play dual-phase-modulated; noiseless linear amplifier (NLA); quantum key distribution; CRYPTOGRAPHY; CHANNELS; STATES;
D O I
10.3390/e19100546
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We show that the successful use of a noiseless linear amplifier (NLA) can help increase the maximum transmission distance and tolerate more excess noise of the plug-and-play dual-phase-modulated continuous-variable quantum key distribution. In particular, an equivalent entanglement-based scheme model is proposed to analyze the security, and the secure bound is derived with the presence of a Gaussian noisy and lossy channel. The analysis shows that the performance of the NLA-based protocol can be further improved by adjusting the effective parameters.
引用
收藏
页数:15
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