论文标题
宣传单光子路径纠缠的分布
Heralded distribution of single-photon path entanglement
论文作者
论文摘要
我们报告了在类似中继器的建筑中电信波长中单光孔纠缠的预示性分布的实验实现。纠缠是在发现单个光子后建立的，该光子源自两个自发参数转换光子对源之一，在擦除了光子的哪个路径信息之后。为了证明纠缠，我们使用不依赖于选择后的纠缠证人。我们在两个位置之间的纠缠中，以1.6 kHz的速度隔开了2 km的光纤。这项工作为高速公路和实用的量子中继器架构铺平了道路。
We report the experimental realization of heralded distribution of single-photon path entanglement at telecommunication wavelengths in a repeater-like architecture. The entanglement is established upon detection of a single photon, originating from one of two spontaneous parametric down conversion photon pair sources, after erasing the photon's which-path information. In order to certify the entanglement, we use an entanglement witness which does not rely on post-selection. We herald entanglement between two locations, separated by a total distance of 2 km of optical fiber, at a rate of 1.6 kHz. This work paves the way towards high-rate and practical quantum repeater architectures.
