Sympathetic Cooling in an Optically Trapped Mixture of Alkali and Spin-Singlet Atoms
Sympathetic Cooling in an Optically Trapped Mixture of Alkali and Spin-Singlet Atoms
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DOI：
10.1103/physrevlett.106.153201
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发表时间：
2011-04-11
影响因子：
8.6
通讯作者：
Gupta, Subhadeep
中科院分区：
文献类型：
--
作者：
Ivanov, Vladyslav V.;Khramov, Alexander;Gupta, Subhadeep
我们报告实现了一个稳定的混合物的超冷的锂和镱原子限制在一个远离共振光偶极阱。我们观察到Yb-174对Li-6的交感冷却，并从物种间热化速率中提取s波散射长度大小垂直棒Li-a6-Yb-174垂直棒=（13 +/- 3）a（0）。使用Yb-174的强制蒸发冷却，我们实现了Li-6温度降低到费米温度以下，纯粹通过种间交感冷却。
We report on the realization of a stable mixture of ultracold lithium and ytterbium atoms confined in a far-off-resonance optical dipole trap. We observe sympathetic cooling of Li-6 by Yb-174 and extract the s-wave scattering length magnitude vertical bar Li-a6-Yb-174 vertical bar = (13 +/- 3)a(0) from the rate of interspecies thermalization. Using forced evaporative cooling of Yb-174, we achieve reduction of the Li-6 temperature to below the Fermi temperature, purely through interspecies sympathetic cooling.