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arXiv 0811.4517quant-ph
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倏逝波中玻色-爱因斯坦凝聚体的表面量子光学

Towards surface quantum optics with Bose-Einstein condensates in evanescent waves

Helmar Bender, Philippe Courteille, Claus Zimmermann, Sebastian Slama

摘要:

本文提出了一种表面势阱,用于研究超冷原子与倏逝波的相干相互作用。该陷阱结合了磁性Joffe陷阱和排斥性倏逝偶极子势。磁阱的位置可以高精度地控制,这使得可以以受控的方式将超冷原子移动到玻璃棱镜的表面。倏逝波的光学势补偿了强大的吸引范德华力,并在距离表面仅几百纳米处产生势垒。用Rb玻色-爱因斯坦凝聚体(BEC)测试了陷阱,BEC稳定地位于距离表面小于1微米的位置。

英文摘要:

We present a surface trap which allows for studying the coherent interaction of ultracold atoms with evanescent waves. The trap combines a magnetic Joffe trap with a repulsive evanescent dipole potential. The position of the magnetic trap can be controlled with high precision which makes it possible to move ultracold atoms to the surface of a glass prism in a controlled way. The optical potential of the evanescent wave compensates for the strong attractive van der Waals forces and generates a potential barrier at only a few hundred nanometers from the surface. The trap is tested with Rb Bose-Einstein condensates (BEC), which are stably positioned at distances from the surfaces below one micrometer.

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