Practical four-dimensional quantum key distribution without entanglement
Practical four-dimensional quantum key distribution without entanglement
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DOI：
10.26421/qic12.1-2-1
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
W. T. Buttler;S. Lamoreaux;J. Torgerson
中科院分区：
文献类型：
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作者：
W. T. Buttler;S. Lamoreaux;J. Torgerson
描述了一种由偏振、相位和时间编码发射机产生多达20(D×(22+1))个可能态的四维(D=4)单光子量子密码协议。该协议可以利用现有的技术，从时间和偏振编码系统中实验实现。该协议是容错的，并且具有每次检测两个原始比特的最大原始比特率，当与状态检测效率相结合时，在理想假设下产生每次传输高达一个的量子比特率，或者高达二维协议(例如众所周知的BB84协议)的原始比特率的两倍。
We describe a four-dimensional (D = 4) single-photon quantum cryptography protocol with up to twenty (D×(22 +1)) possible states generated by a polarization-, phase- and time-encoding transmitter. This protocol can be experimentally realized with existing technology, drawing from time- and polarization-encoded systems. The protocol is error tolerant and has a maximum raw bit rate of two raw bits per detection, which when combined with state detection efficiency yields a qubit rate of up to one per transmission under ideal assumptions, or up to twice the raw bit rate of two-dimensional protocols such as the well-known BB84 protocol.