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中文摘要：
量子通信是一种无条件安全的信息传输方式．提出了一种基于量子纠缠的空间信息系统．该系统以平流层平台和地球同步卫星为量子中继站，分发纠缠光子对．利用量子纠缠在发信者与收信者之间建立通信链路，使用量子隐形传态进行量子信息传输．讨论了该空间信息系统的特性，并对其信息传输性能进行了数值分析．结果表明该系统能够安全有效地传输空间信息．
英文摘要：
Quantum communication is an unconditional secure manner of transmitting information. A system of space information based on quantum entanglement is presented. It is using stratospheric platform and geosynchronous satellite as quantum repeater to deliver entangled photon pairs. The communication link between sender and receiver is built by quantum entanglement, and quantum information is transferred by the principle of quantum teleportation. The characteristic of the system is discussed, and numerical analysis is made for the performance of transmitting information. The result shows that the system can effectively transmit information in security.
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