PPLN的作用 高速率纠缠分布实现了基于高速率纠缠的QKD，以及具有前沿量子网络特征的更一般的操作，而这些在许多指标上都有令人印象深刻的表现。目前许多研究都强调需要利用高总量度、光谱亮度、收集效率和产生纠缠光子对的高可见性，而通过非线性晶体可以满足实际高速率纠缠分布的需求。在量子通信和光子学领域内，非线性光...
在这项研究中,量子通信依赖于量子纠缠态的生成和分发,而使用Covesion的PPLN晶体(周期极化铌酸锂晶体),通过非线性光学效应——自发参量下转换(SPDC)产生纠缠光子对,而这些光子对是实现QKD和量子网络的基础。Covesion的PPLN晶体凭借其高非线性系数和精确地极化周期,实现了高效率的光子对产生,这将提高量子通信系统的整体速率...
而量子密钥分发(QKD)是克服这一威胁的方法之一,通过允许在多方之间安全地共享加密密钥,以抵御潜在的窃听者和量子计算器的解密能力。纠缠光子是此类应用的基本资源,因此纠缠分发是新兴量子网络计划的关键组成部分。来自加州理工学院的Andrew Mueller及其团队,在《Optica》期刊上发表了一篇题为"High-rate multiplexed ...
在这项研究中,量子通信依赖于量子纠缠态的生成和分发,而使用Covesion的PPLN晶体(周期极化铌酸锂晶体),通过非线性光学效应——自发参量下转换(SPDC)产生纠缠光子对,而这些光子对是实现QKD和量子网络的基础。Covesion的PPLN晶体凭借其高非线性系数和精确地极化周期,实现了高效率的光子对产生,这将提高量子通信系统的整体速率...
而量子密钥分发(QKD)是克服这一威胁的方法之一,通过允许在多方之间安全地共享加密密钥,以抵御潜在的窃听者和量子计算器的解密能力。纠缠光子是此类应用的基本资源,因此纠缠分发是新兴量子网络计划的关键组成部分。来自加州理工学院的Andrew Mueller及其团队,在《Optica》期刊上发表了一篇题为"High-rate multiplexed ...
The QKD system demonstrated in Chap. 3 is based on a four-dimensional time-phase encoding scheme in which time basis states are used to generate a secret key and phase basis states are used to monitor the presence of an eavesdropper. The system can generate a secret key at a high rate,...
Conventional quantum key distribution (QKD) typically uses binary encoding based on photon polarization or time-bin degrees of freedom and achieves a key c... T Zhong,H Zhou,RD Horansky,... - 《New Journal of Physics》 被引量: 33发表: 2015年 Hyperentanglement concentration for time-bin and...
A key device for decoy-state QKD is the state encoder, which must produce low-error, stable states with varying photon mean values. Here, we introduce the MacZac (Mach-Zehnder-Sagnac), a time-bin encoder with ultra-low QBER (5) and high stability. Based on nested Sagnac and Mach-...
Key generation efficiency, and security, in differential phase-shift quantum key distribution (DPS-QKD) improve with an increase in the number of optical delays or time-bin superpositions. We demonstrate the implementation of superposition states using time-bins, with two different approaches. In ...
In this work, we present a new time-bin phase-encoding quantum key distribution (QKD), where the transmitter utilizes an inherently stable Sagnac-type interferometer, and has comparable electrical requirements to existing polarization or phase encoding schemes. This approach does not require intensity ...