窃听
量子密钥分配
计算机科学
量子位元
量子密码学
贝尔州
协议(科学)
钥匙(锁)
量子信息科学
量子隐形传态
理论计算机科学
量子信道
量子信息
量子
计算机网络
拓扑(电路)
数学
物理
量子力学
量子纠缠
计算机安全
替代医学
组合数学
医学
病理
作者
Jie Li,Chong‐Qiang Ye,Jian Li
标识
DOI:10.1142/s0219749922500277
摘要
According to the properties of the hyperentangled Bell state and hyper-encoding technology, this paper proposes a high-capacity quantum key distribution protocol with qudits hyper-encoded in polarization and spatial mode degrees of freedom (DOFs). In our protocol, 8 bits of information can be transmitted in one iteration. In contrast, the previous quantum key distribution protocols can only transmit up to 4 or 6 bits in one iteration. Moreover, quantum memory is unnecessary in our protocol. We analyze the relationship between the amount of eavesdropping and the success rate of eavesdropping. With the increase of eavesdropping information, the eavesdropping success probability will decrease sharply. The results show that our protocol is secure. Finally, this protocol is flexible; each qubit has two completely independent DOFs. If one DOF is destroyed, the other can still be used to transmit secure information. The protocol may be useful in the future quantum communication field.
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