A pyramid MOT with integrated optical cavities as a cold atom platform for an optical lattice clock
A pyramid MOT with integrated optical cavities as a cold atom platform for an optical lattice clock
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DOI：
10.1038/s41598-019-48168-3
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发表时间：
2019-08-12
影响因子：
4.6
通讯作者：
Gill, Patrick
中科院分区：
文献类型：
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作者：
Bowden, William;Hobson, Richard;Gill, Patrick
我们实现了一个两阶段，六角金字塔磁光阱（MOT）与锶，并证明加载冷原子到腔增强的一维和二维光学晶格陷阱，所有在一个紧凑的组装在真空光学。我们表明，该设备是适合于高性能的量子技术，特别是专注于其预期的应用作为锶光晶格时钟。我们在500 ms内制备了2 × 10（4）自旋极化的Sr-87原子，观察到原子在晶格中的真空极限寿命为27 s;并且我们测量了来自杂散电荷的12 V m（-1）的背景直流电场，对应于相对于锶时钟转变的（-1.2 +/-0.8）× 10（-18）的分数频移。当与黑体辐射环境的仔细管理结合使用时，该设备显示出作为实现紧凑、鲁棒、可运输的光学晶格时钟的平台的潜力，其系统不确定度为10（-18）级。
We realize a two-stage, hexagonal pyramid magneto-optical trap (MOT) with strontium, and demonstrate loading of cold atoms into cavity-enhanced 1D and 2D optical lattice traps, all within a single compact assembly of in-vacuum optics. We show that the device is suitable for high-performance quantum technologies, focusing especially on its intended application as a strontium optical lattice clock. We prepare 2 x 10(4) spin-polarized atoms of Sr-87 in the optical lattice within 500 ms; we observe a vacuum-limited lifetime of atoms in the lattice of 27 s; and we measure a background DC electric field of 12V m(-1) from stray charges, corresponding to a fractional frequency shift of (-1.2 +/- 0.8) x 10(-18) to the strontium clock transition. When used in combination with careful management of the blackbody radiation environment, the device shows potential as a platform for realizing a compact, robust, transportable optical lattice clock with systematic uncertainty at the 10(-18) level.