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

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

2008-11-27

arxiv.org/abs/0811.4517v1

Physics

Quantum Physics

Scientific paper

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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