Trapped Atoms and Superradiance on an Integrated Nanophotonic Microring Circuit

IF 11.6 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY
Xinchao Zhou, Hikaru Tamura, Tzu-Han Chang, Chen-Lung Hung
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Abstract

Interfacing cold atoms with integrated nanophotonic devices could offer new paradigms for engineering atom-light interactions and provide a potentially scalable route for quantum sensing, metrology, and quantum information processing. However, it remains a challenging task to efficiently trap a large ensemble of cold atoms on an integrated nanophotonic circuit. Here, we demonstrate direct loading of an ensemble of up to 70 atoms into an optical microtrap on a nanophotonic microring circuit. Efficient trap loading is achieved by employing degenerate Raman-sideband cooling in the microtrap, where a built-in spin-motion coupling arises directly from the vector light shift of the evanescent-field potential on a microring. Atoms are cooled into the trap via optical pumping with a single free space beam. We have achieved a trap lifetime approaching 700 ms under continuous cooling. We show that the trapped atoms display large cooperative coupling and superradiant decay into a whispering-gallery mode of the microring resonator, holding promise for explorations of new collective effects. Our technique can be extended to trapping a large ensemble of cold atoms on nanophotonic circuits for various quantum applications.

Abstract Image

集成纳米光子微弧电路上的陷落原子和超辐照度
将冷原子与集成纳米光子器件连接起来可为原子-光相互作用工程提供新的范例,并为量子传感、计量学和量子信息处理提供潜在的可扩展途径。然而,在集成纳米光子电路上有效捕获大量冷原子仍然是一项具有挑战性的任务。在这里,我们展示了如何将多达 70 个原子的原子团直接装载到纳米光子微孔电路上的光学微阱中。通过在微陷阱中采用变性拉曼边带冷却,实现了高效的陷阱装载,其中内置的自旋运动耦合直接来自微孔上瞬发场势的矢量光移。原子通过单个自由空间光束的光学泵浦冷却进入阱。在持续冷却的条件下,我们实现了接近 700 毫秒的阱寿命。我们的研究表明,被捕获的原子显示出巨大的合作耦合和超辐射衰减,进入微孔谐振器的耳语廊模式,为探索新的集体效应带来了希望。我们的技术可以扩展到在纳米光子电路上捕获大量冷原子,用于各种量子应用。
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来源期刊
Physical Review X
Physical Review X PHYSICS, MULTIDISCIPLINARY-
CiteScore
24.60
自引率
1.60%
发文量
197
审稿时长
3 months
期刊介绍: Physical Review X (PRX) stands as an exclusively online, fully open-access journal, emphasizing innovation, quality, and enduring impact in the scientific content it disseminates. Devoted to showcasing a curated selection of papers from pure, applied, and interdisciplinary physics, PRX aims to feature work with the potential to shape current and future research while leaving a lasting and profound impact in their respective fields. Encompassing the entire spectrum of physics subject areas, PRX places a special focus on groundbreaking interdisciplinary research with broad-reaching influence.
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