Experimental decoy state quantum key distribution over 120 km fibre

被引：61

作者：

Yin Zhen-Qiang ^{[1
]}

Han Zheng-Fu ^{[1
]}

Chen Wei ^{[1
]}

Xu Fang-Xing ^{[1
]}

Wu Qing-Lin ^{[1
]}

Guo Guang-Can ^{[1
]}

机构：

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

来源：

CHINESE PHYSICS LETTERS | 2008年 / 25卷 / 10期

关键词：

D O I：

10.1088/0256-307X/25/10/008

中图分类号：

O4 [物理学];

学科分类号：

0702 [物理学];

摘要：

Decoy state quantum key distribution (QKD), being capable of beating PNS attack and being unconditionally secure, has become attractive recently. However, in many QKD systems, disturbances of transmission channel make the quantum bit error rate (QBER) increase, which limits both security distance and key bit rate of real-world decoy state QKD systems. We demonstrate the two-intensity decoy QKD with a one-way Faraday Michelson phase modulation system, which is free of channel disturbance and keeps an interference fringe visibility (99%) long period, over a 120km single mode optical fibre in telecom (1550nm) wavelength. This is the longest distance fibre decoy state QKD system based on the two-intensity protocol.

引用

页码：3547 / 3550

页数：4

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