A quantum degenerate Bose–Fermi mixture of 41K and 6Li

A quantum degenerate Bose–Fermi mixture of 41K and 6Li
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41K 和 6Li 的量子简并玻色费米混合物

DOI:
10.1088/1361-6455/aa658b
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发表时间:
2017-02
期刊:
Journal of Physics B: Atomic, Molecular and Optical Physics
影响因子:
--
通讯作者:
Jian-Wei Pan
Jian-Wei Pan
中科院分区:
其他
文献类型:
--
作者:
Yu-Ping Wu;Xing-Can Yao;Hao-Ze Chen;Xiang-Pei Liu;Xiao-Qiong Wang;Yu-Ao Chen;Jian-Wei Pan

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本文报道了一种用于研究41 K和6Li原子两种量子简并混合体的新装置。我们发展并结合联合收割机几种先进的冷却技术,以实现大原子数和高相空间密度的双组分原子云。此外,我们建立了一个高效率的两种磁性传输系统,从三维磁光阱室转移到一个全玻璃科学室的极端高真空环境和良好的光学访问。我们对41 K原子进行了强制射频蒸发冷却,而6Li原子在光塞磁阱中进行了共振冷却。最后,我们实现了41 K和6Li原子的同时量子简并。41 K的玻色-爱因斯坦凝聚体有1.4 × 105个原子,凝聚分数约为62%,而6Li的简并费米气体在0.25费米温度下的总原子数为5.4 × 105。
We report a new apparatus for the study of two-species quantum degenerate mixture of 41K and 6Li atoms. We develop and combine several advanced cooling techniques to achieve both a large atom number and high phase space density of the two-species atom clouds. Furthermore, we build a high efficiency two-species magnetic transport system to transfer atom clouds from the 3D magneto-optical-trap chamber to a full glass science chamber of an extreme high vacuum environment and good optical access. We perform a forced radio-frequency evaporative cooling for 41K atoms while the 6Li atoms are sympathetically cooled in an optically plugged magnetic trap. Finally, we achieve the simultaneous quantum degeneracy for the 41K and 6Li atoms. The Bose–Einstein condensate of 41K has 1.4 × 105 atoms with a condensate fraction of about 62%, while the degenerate Fermi gas of 6Li has a total atom number of 5.4 × 105 at 0.25 Fermi temperature.
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