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arXiv 2102.11700cond-mat.quant-gasphysics.atom-ph
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铕的窄线磁光阱

Narrow-line magneto-optical trap for europium

Yuki Miyazawa, Ryotaro Inoue, Hiroki Matsui, Kenta Takanashi, Mikio Kozuma

摘要:

本文报道了利用自然线宽为97 kHz的窄谱线冷却跃迁实现铕原子的磁光阱。我们的出发点是连续捕获和光泵亚稳态铕原子的冷却。我们对亚稳态原子和基态原子采用了同时MOT。被捕获的亚稳态原子被连续地抽运回到基态,然后被连续地加载到窄线MOT,在那里最多可捕获$4.7\times10^7$原子。通过压缩过程获得在$6\,\mathrm{μK}$的温度下并且具有$2.2\times10^{11}\,\mathrm{cm^{-3}}$的峰值数密度的自旋极化样品,导致$3\times10^{-5}$的相空间密度。

英文摘要:

We report on the realization of a magneto-optical trap (MOT) for europium atoms using a narrow-line cooling transition with a natural linewidth of 97 kHz. Our starting point is continuous capturing and cooling of optically pumped metastable europium atoms. We have employed simultaneous MOT for the metastable and ground-state atoms. The trapped metastable atoms are successively pumped back to the ground state and then continuously loaded to the narrow-line MOT, where up to $4.7\times10^7$ atoms are captured. A spin-polarized sample at a temperature of $6\,\mathrm{μK}$ and with a peak number density of $2.2\times10^{11}\,\mathrm{cm^{-3}}$ is obtained through the compression process, resulting in a phase space density of $3\times10^{-5}$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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