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Multimode CV‐QKD with non‐Gaussian operations

机译：多模履历QKD与非高斯运行

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Summary Non‐Gaussian operations have been studied intensively in recent years due to their ability to increase the secret key rate for certain CV‐QKD protocols. However, most previous studies on such protocols are carried out in a single‐mode setting, even though in reality any quantum state contains multimode components in frequency space. In this work, we investigate the use of non‐Gaussian operations in a multimode CV‐QKD system. Our main finding is that, contrary to single‐mode CV‐QKD systems, in generic multimode CV‐QKD systems, it is possible to use non‐Gaussian operations to increase the optimized secret key rate. More specifically, we find that at losses of order 30dB, which represents a distance of order 160km and the effective maximum distance for CV‐QKD, the key rate for multimode non‐Gaussian operations can be orders of magnitude higher than single‐mode operations. Our results are important for real‐world CV‐QKD systems, especially those dependent on quantum error correction—a process that requires non‐Gaussian effects.
机译：总结研究了非高斯运行集中在最近几年由于他们的能力增加特定的密钥简历量QKD协议。在这样的协议中进行单量模式设置,尽管在现实中量子态包含多模组件频率空间。使用非高斯运行在一个多模简历量QKD系统。单量模式的简历量QKD系统,在通用多模的简历量QKD系统,可以使用非高斯运行优化秘密密钥。在损失30 db,代表订单160公里距离和有效的最大为简历QKD应承担的距离,多模的关键利率非高斯运行的命令级高于单一的模式运行。结果对现实地理世界的简历量QKD很重要系统,尤其是那些依赖于量子错误认知的过程,要求非高斯分布的影响。

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