论文标题
有限尺寸的安全性证明二元调节连续可变量子密钥分布仅使用杂差测量
Finite-size security proof of binary-modulation continuous-variable quantum key distribution using only heterodyne measurement
论文作者
论文摘要
连续可变的量子密钥分布（CV-QKD）具有许多实际优势，包括与当前的光通信技术的兼容性。使用杂项测量的实施特别有吸引力，因为它消除了远程对本地振荡器的主动相位锁定的需求，但是仅证明了使用同型测量的协议证明，CV QKD的完整安全性仅证明是证明的。在这里，我们提出了一个具有二进制调制的全疾病CV-QKD协议，并证明了其针对有限键制度中一般攻击的安全性。尽管用杂项测量代替同性恋测量值将天真地期望在率距离曲线中受到3 dB的罚款，但我们的证明仅以1 dB的惩罚来实现关键率。
Continuous-variable quantum key distribution (CV-QKD) has many practical advantages including compatibility with current optical communication technology. Implementation using heterodyne measurements is particularly attractive since it eliminates the need for active phase locking of the remote pair of local oscillators, but the full security of CV QKD with discrete modulation was only proved for a protocol using homodyne measurements. Here we propose an all-heterodyne CV-QKD protocol with binary modulation and prove its security against general attacks in the finite-key regime. Although replacing a homodyne measurement with a heterodyne measurement would be naively expected to incur a 3-dB penalty in the rate-distance curve, our proof achieves a key rate with only a 1-dB penalty.
