论文标题
探测器纠缠：钟形测量的准分配
Detector entanglement: Quasidistributions for Bell-state measurements
论文作者
论文摘要
量子域中的测量值可以超过经典概念。这涉及有关测量过程本身的性质以及应用的基本问题，例如它们作为量子信息处理协议的构件的功能。在本文中，我们探讨了理论和实验中检测设备的纠缠概念。设计了一种方法，该方法允许人们通过关节分布中的负贡献来确定正常运行量值的非定量量子相干性，该措施完全描述了所研究的测量设备。然后将此方法应用于理想情况下将贝尔状态投射到贝尔状态的检测器的实验数据。特别是，我们描述了从原始数据中重建上述纠缠的准分裂，并将结果的负面性与理论预期的负面性进行了比较。因此，我们的方法提供了一个多功能工具箱，用于分析有关其量子科学和量子技术的量子相关特征的测量值。
Measurements in the quantum domain can exceed classical notions. This concerns fundamental questions about the nature of the measurement process itself, as well as applications, such as their function as building blocks of quantum information processing protocols. In this paper we explore the notion of entanglement for detection devices in theory and experiment. A method is devised that allows one to determine nonlocal quantum coherence of positive-operator-valued measures via negative contributions in a joint distribution that fully describes the measurement apparatus under study. This approach is then applied to experimental data for detectors that ideally project onto Bell states. In particular, we describe the reconstruction of the aforementioned entanglement quasidistributions from raw data and compare the resulting negativities with those expected from theory. Therefore, our method provides a versatile toolbox for analyzing measurements regarding their quantum-correlation features for quantum science and quantum technology.
