Performance Improvement of Two-way Quantum Key Distribution by Using a Heralded Noiseless Amplifier

被引：0
|
作者：
Chenyang Li
Ruihang Miao
Xinbao Gong
Ying Guo
Guangqiang He
机构：
[1] Shanghai Jiaotong University,State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering
[2] Shanghai Jiaotong University,Department of Electronic Engineering
[3] Central South University,School of Information Science and Engineering
[4] East China Normal University,State Key Laboratory of Precision Spectroscopy
[5] South China Normal University,Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials
来源：
International Journal of Theoretical Physics | 2016年 / 55卷
关键词：
Continuous variable quantum key distribution; Noiseless amplifier; Two-way protocol;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We show the successful use of a heralded noiseless linear amplifier on the detection stage in the two-way continuous-variable quantum key distribution to improve the performance. Due to the excess noise, the secret-key rate of the two-way protocol becomes negative for a certain distance of transmission. The use of a heralded noiseless linear amplifier increases this distance by the equivalent of 20 log10g dB of losses, and it also helps the two-way protocol tolerate more excess noise.
引用
收藏
页码：2199 / 2211
页数：12
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