Entanglement swapping between independent and asynchronous integrated photon-pair sources
Entanglement swapping between independent and asynchronous integrated photon-pair sources
复制标题
独立和异步集成光子对源之间的纠缠交换
DOI：
10.1088/2058-9565/abf599
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发表时间：
2020
影响因子：
6.7
通讯作者：
R. Thew
中科院分区：
文献类型：
--
作者：
Farid Samara;N. Maring;Anthony Martin;A. Raja;T. Kippenberg;H. Zbinden;R. Thew
集成光子学代表了一种技术，可以在成本，尺寸，缩放和鲁棒性方面大大改善量子通信网络。这方面的一个关键基准是证明它们在复杂量子网络协议中的性能，例如真正独立的光子对源之间的纠缠交换。在这里，使用两个独立的、异步泵浦的、集成的Si 3 N4微环谐振器光子对源，在连续波状态下工作，具有时间分辨检测，我们获得了最先进的Hong-Ou-Mandel（93.2 ± 1.6%）和纠缠交换（91.2 ± 3.4%）可见性，同时保持高速率。时间分辨检测有助于高光谱纯度，而无需光谱过滤。我们的研究结果证明了这种电信波段源在实际量子通信中的潜力。
Integrated photonics represents a technology that could greatly improve quantum communication networks in terms of cost, size, scaling, and robustness. A key benchmark for this is to demonstrate their performance in complex quantum networking protocols, such as entanglement swapping between truly independent photon-pair sources. Here, using two independent, asynchronously-pumped, integrated Si3N4 microring resonator photon-pair sources, operating in the continuous-wave regime with time-resolved detections, we obtained state of the art Hong–Ou–Mandel (93.2 ± 1.6%) and entanglement swapping (91.2 ± 3.4%) visibilities, while maintaining high rates. The time-resolved detection facilitates high spectral purities without the need for spectral filtering. Our results demonstrate the potential of such telecom-band sources for practical, real-world quantum communication.