Surface effects in magnetic microtraps
Surface effects in magnetic microtraps
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磁性微阱中的表面效应
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
Claus Zimmermann
中科院分区：
文献类型：
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作者：
J. Fortágh;Herwig Ott;S. Kraft;A. Günther;Claus Zimmermann
我们研究了磁微阱表面附近的玻色-爱因斯坦凝聚和超冷原子。原子沿沿着铜导体制备，距表面的距离在300 μm ~ 20 μm之间，在此范围内，寿命从20 s减小到0.7 s，与距表面的距离呈线性关系。原子表现出与表面的弱热耦合，测得的加热速率保持在500 nK/s以下。此外，我们观察到的冷凝和热云的周期性碎片时，表面接近。
We have investigated Bose-Einstein condensates and ultracold atoms in the vicinity of a surface of a magnetic microtrap. The atoms are prepared along copper conductors at distances to the surface between 300 μm and 20 μm.In this range, the lifetime decreases from 20 s to 0.7 s showing a linear dependence on the distance to the surface. The atoms manifest a weak thermal coupling to the surface, with measured heating rates remaining below 500 nK/s. In addition, we observe a periodic fragmentation of the condensate and thermal clouds when the surface is approached.