发表机构
German Aerospace Center (DLR e.V.), Institute of Quantum Technologies（德国航空航天中心（DLR协会）量子技术研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究利用周期极化KTiOPO₄波导的参量下转换制备通信波长交叉偏振孪生光束，通过单点击概率与归一化阶乘矩分析预告多光子态，为检验光的高阶非经典性提供了便利方法。
AI 中文摘要
多重符合计数与单粒子计数是一种节省资源的量子光学分析工具，即便存在严重的实验缺陷也适用。本研究通过周期极化KTiOPO₄波导中的参量下转换，制备了通信波长范围内的交叉偏振孪生光束，并预告产生最多三个光子的光子数态。首先，研究表明单点击概率是一种多功能工具，不仅可提取态的平均光子数，还可对矩生成函数的值进行采样，而矩生成函数是任何量子光学态的核心。其次，测量了预告n光子态的光子数归一化阶乘矩值g^(m)_h，直至阶数m = n+1。这些归一化光子关联为检验光的高阶非经典性提供了便利方法，可通过违反g^(m+1)_h ≥ g^(m)_h ≥ 1的条件实现。
英文摘要
The manifold coincidences and singles counting provides a resource-saving quantum-optics analysis tool, since it is appropriate even in the presence of heavy experimental imperfections. Here, we prepare cross-polarized twin beams in the telecommunication wavelength range via parametric down-conversion in a periodically-poled KTiOPO$_4$ waveguide and herald photon-number states up to three photons. First, we show that the single-click probability is a versatile tool not only for extracting the state's mean photon number but also for sampling values of the moment generating function being the core behind any quantum optical state. Second, we measure values of the normalized factorial moments of photon number, $g^{(m)}_{\text{h}}$, up to the order $m = n+1$ for the heralded $n$-photon state. These normalized photon correlations provide an expedient method for examining the higher-order non-classicality of light by violating the condition $g^{(m+1)}_{\text{h}} \ge g^{(m)}_{\text{h}} \ge 1$.
Comments6 Pages, 7 figures
