Experimental Decoy State Quantum Key Distribution Over 120 km Fibre
Experimental Decoy State Quantum Key Distribution Over 120 km Fibre
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DOI：
10.1088/0256-307x/25/10/008
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发表时间：
2007-04
影响因子：
3.5
通讯作者：
Z. Yin;Z. Han;Wei Chen;F. Xu;Qing-Lin Wu;Guangcan Guo
中科院分区：
文献类型：
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作者：
Z. Yin;Z. Han;Wei Chen;F. Xu;Qing-Lin Wu;Guangcan Guo
诱饵状态量子密钥分发（QKD）能够抵御 PNS 攻击并且无条件安全，最近变得很有吸引力。然而，在许多QKD系统中，传输通道的干扰使得量子误码率（QBER）增加，这限制了现实世界诱饵态QKD系统的安全距离和密钥比特率。我们展示了采用单向法拉第-迈克尔逊相位调制系统的二强度诱饵 QKD，该系统不受信道干扰，并且在电信（1550 nm）波长的 120 公里单模光纤上保持干涉条纹可见性（99％）长周期。这是基于二强度协议的最长距离光纤诱饵态QKD系统。
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 (1550 nm) wavelength. This is the longest distance fibre decoy state QKD system based on the two-intensity protocol.