Subrecoil cooling of 6Li atoms by 2S→3P ultraviolet narrow transition

被引：1

作者：

Rui, Yang ^{[1
]}

Zhang, Liang ^{[1
]}

Li, Rui ^{[1
]}

Liu, Pengyue ^{[1
]}

Liu, Xuemei ^{[1
]}

Duan, Chunyang ^{[1
]}

Yu, Shichuan ^{[1
]}

Wu, Yuelong ^{[1
]}

Wu, Haibin ^{[1
,2
,3
]}

机构：

[1] East China Normal Univ, Inst Quantum Sci & Precis Measurement, State Key Lab Precis Spect, Shanghai 200062, Peoples R China

[2] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China

[3] Shanghai Res Ctr Quantum Sci, Shanghai 201315, Peoples R China

来源：

SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2023年 / 66卷 / 08期

基金：

中国国家自然科学基金;

关键词：

cold atom; narrow-line UV cooling; photon-recoil limit; ABSOLUTE FREQUENCY-MEASUREMENT; EQUIVALENCE PRINCIPLE; !text type='PYTHON']PYTHON[!/text; FRAMEWORK; LEVEL;

D O I：

10.1007/s11433-023-2132-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Laser cooling of atoms and molecules is crucial to exhibiting excellent features in the field of low-temperature physics. Cooling Li-6 atoms to very low temperatures is difficult due to their partially resolved D-2 line of excited states. Here we report an observation of cooling Li-6 atom samples to 16 & mu;K with an ultraviolet (UV) laser in a magneto-optical trap, which breaks the Doppler cooling limit and approaches half of the photon-recoil limit. The essential mechanism of cooling results is that the natural linewidth is comparable to the recoil frequency in such a 2S & RARR;3P ultraviolet narrow transition. Laser frequency stability is important in the cooling process, and thus, the UV laser was locked to an optical frequency comb referenced to an ultrastable optical cavity. The cooling was numerically simulated to explain the cooling forces. The results can provide an ideal platform in the field of precision measurements and ultracold Fermi gases.

引用

页数：6

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