Quantum degenerate two-species fermi-fermi mixture coexisting with a bose-einstein condensate.
Quantum degenerate two-species fermi-fermi mixture coexisting with a bose-einstein condensate.
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DOI：
10.1103/physrevlett.100.010401
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发表时间：
2007-10
影响因子：
8.6
通讯作者：
M. Taglieber;A. Voigt;T. Aoki;T. Hänsch;K. Dieckmann
中科院分区：
文献类型：
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作者：
M. Taglieber;A. Voigt;T. Aoki;T. Hänsch;K. Dieckmann
我们报告了两种不同原子种类的量子简并费米-费米混合物的生成。量子简并混合物是通过蒸发冷却的玻色子 87Rb 气体对费米子 6Li 和 40K 气体进行交感冷却来实现的。我们描述了捕集和冷却方法的组合，这被证明对于成功冷却混合物至关重要。特别是，我们研究了冷却过程的最后部分，结果表明，通过催化冷却，40K 的存在提高了 87Rb 对 6Li 气体的交感冷却效率。由于两种组分的物理性质不同，量子简并 6Li-40K 费米-费米混合物是稳定异核系统的绝佳候选者，可以研究几种迄今为止尚未探索的量子物质类型。
We report on the generation of a quantum degenerate Fermi-Fermi mixture of two different atomic species. The quantum degenerate mixture is realized employing sympathetic cooling of fermionic 6Li and 40K gases by an evaporatively cooled bosonic 87Rb gas. We describe the combination of trapping and cooling methods that proved crucial to successfully cool the mixture. In particular, we study the last part of the cooling process and show that the efficiency of sympathetic cooling of the 6Li gas by 87Rb is increased by the presence of 40K through catalytic cooling. Because of the differing physical properties of the two components, the quantum degenerate 6Li-40K Fermi-Fermi mixture is an excellent candidate for a stable, heteronuclear system allowing the study of several so far unexplored types of quantum matter.