Production of quantum-degenerate strontium gases
Production of quantum-degenerate strontium gases
复制标题
量子简并锶气体的生产
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
F. Schreck
中科院分区：
文献类型：
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作者：
S. Stellmer;R. Grimm;F. Schreck
我们报告了一个改进的方案，以产生玻色-爱因斯坦凝聚（BEC）和锶的简并费米气体。该方案使我们能够创造出比以前具有更高原子数、更短实验周期时间或更深量子简并度的量子气体。我们创建了超过10^7个原子的84-Sr的BEC，这比以前报道的实验提高了30倍。我们将86-Sr BEC的原子数增加到2.5x10^4（提高了5倍），并改进了吸引相互作用的88-Sr BEC的产生。我们提出了一个计划，以产生84-Sr BEC的周期时间为2秒，这是据我们所知，是最短的周期时间的BEC实验报道。我们制备了T/T_F低至0.10（1）的深简并~（87）Sr费米气体，其中原子核自旋态的数目可以设置为1 ~ 10之间的任意值。此外，我们报告共五个不同的双简并玻色玻色和玻色费米混合物。这些研究为锶量子气体在不久的将来的应用奠定了良好的基础。
We report on an improved scheme to generate Bose-Einstein condensates (BECs) and degenerate Fermi gases of strontium. This scheme allows us to create quantum gases with higher atom number, a shorter time of the experimental cycle, or deeper quantum degeneracy than before. We create a BEC of 84-Sr exceeding 10^7 atoms, which is a 30-fold improvement over previously reported experiments. We increase the atom number of 86-Sr BECs to 2.5x10^4 (a fivefold improvement), and refine the generation of attractively interacting 88-Sr BECs. We present a scheme to generate 84-Sr BECs with a cycle time of 2s, which, to the best of our knowledge, is the shortest cycle time of BEC experiments ever reported. We create deeply-degenerate 87-Sr Fermi gases with T/T_F as low as 0.10(1), where the number of populated nuclear spin states can be set to any value between one and ten. Furthermore, we report on a total of five different double-degenerate Bose-Bose and Bose-Fermi mixtures. These studies prepare an excellent starting point for applications of strontium quantum gases anticipated in the near future.