Effect of intensity modulator extinction on practical quantum key distribution system

被引：25

作者：

Huang, J. Z. ^{[1
]}

Yin, Z. Q. ^{[1
]}

Wang, S. ^{[1
]}

Li, H. W. ^{[1
]}

Chen, W. ^{[1
]}

Han, Z. F. ^{[1
]}

机构：

[1] Univ Sci & Technol China, Key Lab Quantum Informat, Hefei 230026, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL D | 2012年 / 66卷 / 06期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

SECURITY; CRYPTOGRAPHY;

D O I：

10.1140/epjd/e2012-20757-5

中图分类号：

O43 [光学];

学科分类号：

070207 [光学];

摘要：

We study how the imperfection of intensity modulator effects on the security of a practical quantum key distribution system. The extinction ratio of the realistic intensity modulator is considered in our security analysis. We show that the secret key rate increases, under the practical assumption that the indeterminable noise introduced by the imperfect intensity modulator can not be controlled by the eavesdropper.

引用

页数：5

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