论文标题
基于Rydberg合奏的有效且纯净的来源的无需区别的单个光子无法区分的单光子
On-demand indistinguishable single photons from an efficient and pure source based on a Rydberg ensemble
论文作者
论文摘要
与原子系统耦合的单光子已证明是开发量子技术的有前途的平台。然而，缺乏与原子平台兼容的明亮的单调，高度纯净和高度无法区分的单光子源。在这项工作中，我们基于强烈相互作用的Rydberg系统演示了这样的来源。封锁的Rydberg集合中的大型光学非线性将相干的光转化为单个式激发，可以将其作为量子场连贯地检索。我们观察到一个高达0.18（2），$ g^{（2）} = 2.0（1.5）\ times10^{ - 4} $的单晶型模式效率，以及0.982（7）的不可区分性，这使此系统有望可缩放量子信息应用程序。考虑到损失，我们推断出高达0.40（4）的生成概率。此外，我们研究了污染物Rydberg激发对源效率的影响。最后，我们介绍指标以基准按需单光源来源的性能。
Single photons coupled to atomic systems have shown to be a promising platform for developing quantum technologies. Yet a bright on-demand, highly pure and highly indistinguishable single-photon source compatible with atomic platforms is lacking. In this work, we demonstrate such a source based on a strongly interacting Rydberg system. The large optical nonlinearities in a blockaded Rydberg ensemble convert coherent light into a single-collective excitation that can be coherently retrieved as a quantum field. We observe a single-transverse-mode efficiency up to 0.18(2), $g^{(2)}=2.0(1.5)\times10^{-4}$, and indistinguishability of 0.982(7), making this system promising for scalable quantum information applications. Accounting for losses, we infer a generation probability up to 0.40(4). Furthermore, we investigate the effects of contaminant Rydberg excitations on the source efficiency. Finally, we introduce metrics to benchmark the performance of on-demand single-photon sources.
