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.

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页数：15

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