论文标题
使用弱相干脉冲来表征贝尔状态分析仪
Characterizing Bell state analyzer using weak coherent pulses
论文作者
论文摘要
Bell State Analyzer（BSA）是光子量子信息处理中最关键的设备之一。尽管线性光学器件提供了实现BSA的实用方法，但当输入不是理想的单光子状态时，它提供了不可避免的错误。在这里，我们提出了一种使用弱相干脉冲来推导单光子输入的BSA的简单方法。通过将方法应用于与参考框架无关的测量设备无关的量子密钥分布，我们通过实验验证该方法的可行性和有效性。
Bell state analyzer (BSA) is one of the most crucial apparatus in photonic quantum information processing. While linear optics provide a practical way to implement BSA, it provides unavoidable errors when inputs are not ideal single-photon states. Here, we propose a simple method to deduce the BSA for single-photon inputs using weak coherent pulses. By applying the method to Reference-Frame-Independent Measurement-Device-Independent Quantum Key Distribution, we experimentally verify the feasibility and effectiveness of the method.
