论文标题
部分可观测时空混沌系统的无模型预测
Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler
论文作者
论文摘要
单个光子之间的干扰是许多量子光学实验和量子技术（例如量子通信或计算）中应用的关键。在电信波长上操作系统并集成这些应用程序的设置以提高稳定性，紧凑性和可扩展性是有利的。一个新的有前途的量子光学材料平台是绝缘子（LNOI）上的Niobate锂。在这里，我们意识到来自LNOI定向耦合器中的工程参数下转换源的电信光子之间的Hong-Ou-Mandel（HOM）干扰。耦合器已在房屋中设计和制造，并提供接近完美的平衡光束分裂。我们获得了（93.5 +/- 0.7）％的原始HOM可见性，主要受源表现的限制，并且与片外测量值良好。这为LNOI中更复杂的量子实验奠定了基础
Interference between single photons is key for many quantum optics experiments and applications in quantum technologies, such as quantum communication or computation. It is advantageous to operate the systems at telecommunication wavelengths and to integrate the setups for these applications in order to improve stability, compactness and scalability. A new promising material platform for integrated quantum optics is lithium niobate on insulator (LNOI). Here, we realise Hong-Ou-Mandel (HOM) interference between telecom photons from an engineered parametric down-conversion source in an LNOI directional coupler. The coupler has been designed and fabricated in house and provides close to perfect balanced beam splitting. We obtain a raw HOM visibility of (93.5+/-0.7)%, limited mainly by the source performance and in good agreement with off-chip measurements. This lays the foundation for more sophisticated quantum experiments in LNOI
