论文标题
无漏洞的插件量子密钥分布
Loophole-free plug-and-play quantum key distribution
论文作者
论文摘要
健壮，简单且灵活的量子密钥分布（QKD）对于实现此技术的实际应用至关重要。与典型的相编码QKD方案相反，插入式QKD设计仅需要一个无主动反馈的臂长度不敏感的干涉仪，其中噪声会自动通过双向结构来补偿。但是，在典型的插件设计中存在某些可能的漏洞，需要考虑和严格的监视。这项研究提出了具有双向方案的无漏洞播放QKD方案，并提出了该方案的实验证明。在诱饵状态方法辅助的集体攻击方案下对安全性进行了分析。该计划是在50.4公里的商业光纤中实施的，没有主动反馈。该系统具有超低错误率的高度稳健性能，并在24小时内通过重大环境变化保持了0.9947 +/- 0.0002的超高可见度。
Robust, simple, and flexible quantum key distribution (QKD) is vital for realising practical applications of this technique. Contrary to typical phase-coded QKD schemes, the plug-and-play QKD design requires only one arm-length-insensitive interferometer without active feedback, in which the noise is automatically compensated by the two-way structure. However, there are certain possible loopholes in the typical plug-and-play designs, which require consideration and strict monitoring. This study proposes a loophole-free plug-and-play QKD scheme with two-way protocol and presents an experimental demonstration of said scheme. The security is analysed under a collective attack scenario assisted by the decoy state method. The scheme was implemented in a 50.4 km commercial fibre without active feedback. The system showed highly robust performance with an ultra-low error rate and maintained an ultra-high visibility of 0.9947+/-0.0002 through significant environmental changes over 24 hours.
