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中文摘要：
提出了一种基于纠缠态的量子中继通信系统，该系统应用纠缠为基本资源．纠缠为量子隐形传态和绝对安全的量子通信提供了保证．量子中继器用来延长高纠缠度的纠缠光子对的纠缠距离，利用纠缠交换和纠缠纯化在系统的发信者与受信者之间建立光子对的纠缠．应用量子隐形传态的原理传输量子信息．系统分析表明，量子通信系统的吞吐率随着通信双方成功建立纠缠的概率增大而显著增加，量子信号的传输距离取决于量子中继节点的级数．
英文摘要：
A scheme of long-distance quantum communication system base presented,which utilize entanglement as its essential resource. This entan d on entangled photon pairs is lement enables phenomena such as quantum teleportation and perfectly secure quantum communication. The quantum repeater extends the length of the entangled photon pairs with high fidelity, the entanglement of photons between sender and receiver is built by entanglement swapping and entanglement purification. The quantum information is transferred by the principle of quantum teleportation. Performance analysis results show that the throughput quantum communication system of increases greatly with higher probabilities with which entanglement is built between sender＇s photons and receiver＇s photons. The transmitting distance of the quantum signal was determined by the series of the quantum repeater nodes.
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