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中文摘要：
为提高量子密钥分配协议的密钥生成率，构造了一组两方三级系统的完备正交归一化基．利用该正交归一化基和交换粒子之间的纠缠提出了一种量子密钥分配协议．三级可以推广到多级，利用粒子之间的纠缠交换和多级密钥分配可以极大地提高检测窃听的效率、密钥生成率以及信息容量．
英文摘要：
In order to improve the key generation rate of the quantum key distribution protocols, a perfect complete orthogonal basis of the bipartite three-level system was constructed. By using this basis and swapping the entanglement between the particles, a quantum key distribution protocol was presented. Therefore, a three-level can be generalized to multi-level. Using entanglement swapping between the particles and multi-level key distribution, it can significantly improve the efficiency of the detection of eavesdropping and the key generation rate and the information flux.
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