Single-site-resolved imaging of ultracold atoms in a triangular optical lattice
Single-site-resolved imaging of ultracold atoms in a triangular optical lattice
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DOI：
10.1088/1367-2630/abcdc8
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发表时间：
2020-10
影响因子：
3.3
通讯作者：
R. Yamamoto;H. Ozawa;David C. Nak;Ippei Nakamura;T. Fukuhara
中科院分区：
文献类型：
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作者：
R. Yamamoto;H. Ozawa;David C. Nak;Ippei Nakamura;T. Fukuhara
我们通过采用拉曼边带冷却演示了三角形光学晶格中超冷 87Rb 原子的单点分辨荧光成像。结合 D1 线处的拉曼跃迁和通过 D2 线的光泵浦产生的光子散射，我们获得了背景噪声低的图像。通过拉曼边带冷却荧光成像的 11 个实验参数的贝叶斯优化使我们能够实现单原子检测，保真度高达 (96.3 ± 1.3)%。三角形光学晶格中的单原子和单位点分辨检测为直接观察几何受挫系统中的自旋相关性或纠缠铺平了道路。
We demonstrate single-site-resolved fluorescence imaging of ultracold 87Rb atoms in a triangular optical lattice by employing Raman sideband cooling. Combining a Raman transition at the D1 line and a photon scattering through an optical pumping of the D2 line, we obtain images with low background noise. The Bayesian optimisation of 11 experimental parameters for fluorescence imaging with Raman sideband cooling enables us to achieve single-atom detection with a high fidelity of (96.3 ± 1.3)%. Single-atom and single-site resolved detection in a triangular optical lattice paves the way for the direct observation of spin correlations or entanglement in geometrically frustrated systems.