【摘要】 提出了一种基于纠缠交换的多方多级量子密钥分配协议.构造了一种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纠缠交换可以实现两方量子密钥分配.同时,三级可以推广到多级以及两方推广到多方,即可以实现基于纠缠交换的多方多级量子密钥分配.这样,利用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.更多还原

【Abstract】 A multi-party multi-level quantum key distribution protocol based on entanglement swapping is proposed. A perfect complete orthonormal basis of the bi-party three-level systems is first constructed. By using this basis and swapping the entanglement, bi-party quantum key distribution is realized. In addition, three-level can be generalized to multi-level and bi-party to multi-party,i.e., multi-party multi-level quantum key distribution based on entanglement swapping can be achieved. Using entanglement swapping and multi-level key distribution can significantly increase the efficiency of the detection of eavesdropping, the key generation rate and the information flux.更多还原