Title: Hybrid Trapping of Cold Atoms with Surface Forces and Blue-Detuned Evanescent Light on a Nanophotonic Waveguide Show Chinese title

Title: 表面力和纳米光子波导上的蓝失谐倏逝光结合的冷原子混合俘获

Abstract: We demonstrate a novel hybrid nanophotonic trap for cold neutral atoms, leveraging surface forces for attraction and blue-detuned evanescent light for repulsion. We attribute the attractive potential to a combination of Casimir-Polder interactions and electrostatic charges distributed on the waveguide surface. Despite the trap's shallow depth, we efficiently load atoms into it via adiabatic transfer from a conventional two-color dipole trap. Remarkably, the hybrid trap supports a long atomic storage time of 140(9) ms and exhibits a Ramsey coherence time of 16.8(2) ms, the latter exceeding significantly previous reports for nanophotonic systems. Our results pave the way for further exploration of atom-surface interactions at the nanoscale and illustrate the potential of harnessing surface forces to enhance storage and coherence times for atoms coupled to nanophotonic waveguides. This advancement offers new opportunities for neutral-atom quantum technologies. Show Chinese abstract

Abstract: 我们展示了一种新颖的混合纳米光子陷阱，用于捕获冷中性原子，利用表面力进行吸引，以及蓝移衰减光进行排斥。 我们将吸引力势归因于卡西米尔-波尔德相互作用和波导表面分布的静电荷的组合。 尽管陷阱的深度较浅，但我们通过从传统的双色偶极子陷阱进行绝热转移，有效地将原子加载到其中。 值得注意的是，该混合陷阱支持长达140(9)毫秒的原子存储时间，并表现出16.8(2)毫秒的Ramsey相干时间，后者显著超过了之前纳米光子系统报告的数值。 我们的结果为在纳米尺度上进一步探索原子-表面相互作用铺平了道路，并展示了利用表面力增强与纳米光子波导耦合的原子存储时间和相干性的潜力。 这一进展为中性原子量子技术提供了新的机遇。