基于双耦合Mach-Zehnder干涉仪的相位噪声免疫无条件安全经典密钥分配
Phase noise-immune unconditionally secured classical key distribution using doubly coupled Mach-Zehnder interferometer
摘要：
最近，在双Mach-Zehnder干涉仪框架下的经典密钥分发（USCKD）中提出了一种新的无条件安全性物理，并证明了其无条件安全性不受量子密钥分发协议的不可克隆定理的影响.由于环境相位波动引起的温度变化，大气干扰，或机械振动，主动锁相似乎是必要的USCKD的双通道传输布局。在这里，USCKD的双信道布局被证明是一个环境噪声免疫协议，特别是对于自由空间光链路，其中的传输距离是潜在的无限的，如果考虑随机相位噪声。
英文摘要：
Recently, new physics for unconditional security in a classical key distribution (USCKD) in a frame of a double Mach-Zehnder interferometer has been proposed and demonstrated as a proof of principle, where the unconditional security is unaffected by the no-cloning theorem of quantum key distribution protocols. Due to environmental phase fluctuations caused by temperature variations, atmospheric turbulences, or mechanical vibrations, active phase locking seems to be necessary for the two-channel transmission layout of USCKD. Here, the two-channel layout of USCKD is demonstrated to be an environmental noise-immune protocol especially for free space optical links, where the transmission distance is potentially unlimited if random phase noises are considered.
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