论文标题
来自远程失调的NV中心的电信带量子转换光子的电信量子干扰
Telecom-band quantum interference of frequency-converted photons from remote detuned NV centers
论文作者
论文摘要
量子网络上的纠缠分布有望实现从根本上实现新技术。在过去的十年中，在几个实验平台上实现了分离的量子处理节点之间的纠缠。为了朝着大都市规模的量子网络测试床迈进，在现有电信基础架构上创建和不可区分的单个光子的创建和传播是关键。在这里，我们报告了使用量子频率转换为电信L波段发出的远程，频谱中基于NV中心的网络节点发出的光子的干扰。我们发现在发射持续时间的整个范围内，可见性为0.79 $ \ pm $ 0.03，而转换的NV光子在0.9左右的不可区分性，这证实了删除存在的频谱信息。我们的方法实现了对节点的完全分离和独立的控制，控制和量子信号的时间进行交流以及积极的反馈以稳定输出频率。我们的结果表明了一个工作原则，可以很容易地在其他平台上使用，并显示出对部署的电信纤维产生大都市量表，固态纠缠的清晰途径。
Entanglement distribution over quantum networks has the promise of realizing fundamentally new technologies. Entanglement between separated quantum processing nodes has been achieved on several experimental platforms in the past decade. To move towards metropolitan-scale quantum network test beds, the creation and transmission of indistinguishable single photons over existing telecom infrastructure is key. Here we report the interference of photons emitted by remote, spectrally detuned NV center-based network nodes, using quantum frequency conversion to the telecom L-band. We find a visibility of 0.79$\pm$0.03 and an indistinguishability between converted NV photons around 0.9 over the full range of the emission duration, confirming the removal of the spectral information present. Our approach implements fully separated and independent control over the nodes, time-multiplexing of control and quantum signals, and active feedback to stabilize the output frequency. Our results demonstrate a working principle that can be readily employed on other platforms and shows a clear path towards generating metropolitan scale, solid-state entanglement over deployed telecom fibers.
