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arXiv 1506.04420quant-ph
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高维时间仓编码光子的信息

The information of high-dimensional time-bin encoded photons

Thomas Brougham, Christoph F. Wildfeuer, Stephen M. Barnett, Daniel J. Gauthier

摘要:

我们确定的共享信息,可以提取的时间仓纠缠光子使用帧编码。我们考虑由一般下转换源产生的光子,并且还对每个帧内的多个光子的损失、暗计数和影响进行建模。此外,我们描述了一个程序,包括其他缺陷,如后脉冲,检测器死区时间和抖动。结果表明,推导的最大信息,可以从高维时间仓纠缠光子产生的自发参量下转换的解析表达式。一个关键的发现是,在现实条件下,使用标准的SPAD探测器,仍然可以选择帧大小,以便提取超过10位每光子。这些结果对于高维量子密钥分发系统的实验具有参考价值。

英文摘要:

We determine the shared information that can be extracted from time-bin entangled photons using frame encoding. We consider photons generated by a general down-conversion source and also model losses, dark counts and the effects of multiple photons within each frame. Furthermore, we describe a procedure for including other imperfections such as after-pulsing, detector dead-times and jitter. The results are illustrated by deriving analytic expressions for the maximum information that can be extracted from high-dimensional time-bin entangled photons generated by a spontaneous parametric down conversion. A key finding is that under realistic conditions and using standard SPAD detectors one can still choose frame size so as to extract over 10 bits per photon. These results are thus useful for experiments on high-dimensional quantum-key distribution system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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