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arXiv 0910.0634cond-mat.quant-gas
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锶的玻色-爱因斯坦凝聚

Bose-Einstein Condensation of Strontium

Simon Stellmer, Meng Khoon Tey, Bo Huang, Rudolf Grimm, Florian Schreck

摘要:

报道了超冷锶原子的玻色-爱因斯坦凝聚。我们使用84Sr同位素,其天然丰度较低,但为蒸发冷却提供了优异的散射性能。在亚稳态中使用磁阱、窄线冷却和光阱中的直接蒸发冷却进行聚集,得到含有1.5 × 10^5个原子的纯凝聚体。这使得84Sr在未来涉及原子双电子系统的量子简并气体实验中处于领先地位。

英文摘要:

We report on the attainment of Bose-Einstein condensation with ultracold strontium atoms. We use the 84Sr isotope, which has a low natural abundance but offers excellent scattering properties for evaporative cooling. Accumulation in a metastable state using a magnetic-trap, narrowline cooling, and straightforward evaporative cooling in an optical trap lead to pure condensates containing 1.5x10^5 atoms. This puts 84Sr in a prime position for future experiments on quantum-degenerate gases involving atomic two-electron systems.

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