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Secure Quantum Key Distribution Network with Bell States and Local Unitary Operations
作者姓名:李春燕  周宏余  汪燕  邓富国
作者单位:TheKeyLaboratoryofBeamTechnologyandMaterialModificationofMinistryofEducation,BeijingNormalUniversity,Beijing100875
摘    要:We propose a theoretical scheme for secure quantum key distribution network following the ideas m quantum aense coding. In this scheme, the server of the network provides the service for preparing and measuring the Bell states,and the users encode the states with local unitary operations. For preventing the server from eavesdropping, we design a decoy when the particle is transmitted between the users. The scheme has high capacity as one particle carries two bits of information and its efficiency for qubits approaches 100%. Moreover, it is unnecessary for the users to store the quantum states, which makes this scheme more convenient in applications than others.

关 键 词:量子密钥安全  网络分布  贝尔态  局部酉算子
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