Microscopic Control and Detection of Ultracold Strontium in Optical-Tweezer Arrays
Microscopic Control and Detection of Ultracold Strontium in Optical-Tweezer Arrays
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DOI：
10.1103/physrevx.8.041054
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发表时间：
2018-12-28
影响因子：
12.5
通讯作者：
Kaufman, A. M.
中科院分区：
文献类型：
--
作者：
Norcia, M. A.;Young, A. W.;Kaufman, A. M.
光镊为单原子的操纵和探测提供了一个通用的平台。在这里，我们使用光镊演示了一套工具的原子锶，它有两个价电子的微观控制。与通常用于镊子的单价电子原子相比，锶具有更复杂的内部状态结构，具有各种过渡波长和线宽。我们报道了单原子加载到亚波长尺度光镊阵列中，并实现了窄线宽光跃迁的无光移控制。我们使用这种过渡来执行三维基态冷却，并使高保真无损成像的单原子亚波长空间尺度。这些能力与锶丰富的内部结构相结合，开辟了新的可能性，包括基于镊子的计量学，新的量子计算架构以及通往低熵多体物理学的新途径。
Optical tweezers provide a versatile platform for the manipulation and detection of single atoms. Here, we use optical tweezers to demonstrate a set of tools for the microscopic control of atomic strontium, which has two valence electrons. Compared to the single-valence-electron atoms typically used with tweezers, strontium has a more complex internal state structure with a variety of transition wavelengths and linewidths. We report single-atom loading into an array of subwavelength scale optical tweezers and light-shift-free control of a narrow-linewidth optical transition. We use this transition to perform three-dimensional ground-state cooling and to enable high-fidelity nondestructive imaging of single atoms on subwavelength spatial scales. These capabilities, combined with the rich internal structure of strontium, open new possibilities including tweezer-based metrology, new quantum computing architectures, and new paths to low-entropy many-body physics.