arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0708.3546quant-ph
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现场实验“星型”城域量子密钥分发网络

Field Experimental "Star Type" Metropolitan Quantum Key Distribution Network

Wei Chen, Zheng-F Han, Tao Zhang, Hao Wen, Zhen-Q Yin, Fang-X Xu, Qing-L Wu, Yun-Liu, Yang Zhang, Xiao-F Mo, You-Z Gui, Guo Wei, Guang-C Guo

摘要:

量子密钥分发(QKD)网络是近年来研究的热点。由于量子信息的特殊性,构建一个无可信中继的全连通量子密钥分发网络是一个极具挑战性的问题。在这封信中,我们报告的第一个实现的QKD网络没有可信中继,覆盖大城市的商业骨干光纤网络。星型拓扑四用户QKD网络使用量子路由器(QR)自动寻址量子信号,网络中的每个用户都可以同时接收和分发量子密钥。两个地理上分离的节点之间的最长和最短光纤长度分别为42.6km和32km,最大平均量子误码率(QBER)低于8%。这一结果为QKD在现有网络中的应用开辟了新的可能性。

英文摘要:

Quantum key distribution (QKD) network has recently attracted growing attentions. Due to the special characteristics of quantum information, to build a full-connectivity QKD network without trusted relays is a stimulating challenge. In this letter, we report on the first realization of QKD network without trusted relays which covers metropolis in the commercial backbone optical fiber networks. The star topology four-user QKD network automatically addresses the quantum signal with a quantum router (QR) and every user in the network can receive and distribute quantum keys to any others simultaneously. The longest and the shortest length of fibers between two geographically separated nodes are 42.6km and 32km respectively, and the maximum average quantum bit error rate (QBER) is below 8%. This result opens a new possibility for the use of QKD into existing network.

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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