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arXiv 0812.3292quant-ph
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连续变量量子密钥分发原型的现场测试

Field test of a continuous-variable quantum key distribution prototype

Simon Fossier, Eleni Diamanti, Thierry Debuisschert, André Villing, Rosa Tualle-Brouri, Philippe Grangier

摘要:

设计并实现了一个基于相干态和反向协调的连续变量量子密钥分发协议原型。该系统使用时间和偏振复用的最佳传输和检测的信号和相位参考,并采用先进的纠错码的和解。系统的安全性得到保证,防止一般的相干窃听攻击。该原型的性能在预装光纤上进行了测试,作为结合不同量子密钥分发技术的量子密码网络的一部分。原型的稳定和自动操作超过57小时,在3 dB损耗光纤上产生了8 kbit/s的平均密钥分发速率,包括密钥提取过程以及所有量子和经典通信。因此,该系统非常适合在具有高速要求的大城市规模网络中保护通信。

英文摘要:

We have designed and realized a prototype that implements a continuous-variable quantum key distribution protocol based on coherent states and reverse reconciliation. The system uses time and polarization multiplexing for optimal transmission and detection of the signal and phase reference, and employs sophisticated error-correction codes for reconciliation. The security of the system is guaranteed against general coherent eavesdropping attacks. The performance of the prototype was tested over preinstalled optical fibres as part of a quantum cryptography network combining different quantum key distribution technologies. The stable and automatic operation of the prototype over 57 hours yielded an average secret key distribution rate of 8 kbit/s over a 3 dB loss optical fibre, including the key extraction process and all quantum and classical communication. This system is therefore ideal for securing communications in metropolitan size networks with high speed requirements.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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