深度调制的即插即用副载波量子密钥分发
Plug&Play subcarrier wave quantum key distribution with deep modulation
摘要：
本文提出了一种基于子载波编码的即插即用量子密钥分发方案。我们的详细研究表明，如何子载波编码工作在瑞利后向散射，色散和其他实验中出现的即插即用配置的负面因素的存在。我们提出并实验证明了一种新的制度的副载波编码，在一个单一的基础上，同时检测两个逻辑状态相结合的鲁棒性和简单的原始协议。这种深度调制机制表现出可靠的量子通信，其损耗高达20 dB，并且与单向或即插即用配置中的原始子载波量子密钥分发相比，密钥生成速率有望增加两倍。
英文摘要：
We report a quantum key distribution using subcarrier wave encoding in Plug&Play configuration. Our detailed study shows how subcarrier encoding operates in a presence of Rayleigh back-scattering, chromatic dispersion and other experimental negative factors that occur in Plug&Play configuration. We propose and experimentally demonstrate a novel regime for the subcarrier wave encoding, where simultaneous detection of two logical states in a single basis is combined with robustness and simplicity of the original protocol. This deep modulation regime shows reliable quantum communication with losses up to 20 dB and promises a twice increase in secret key generation rate in comparison with the original subcarrier wave quantum key distribution in one-way or Plug&Play configurations.
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