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Q: Quantenoptik

Q 14: Quantengase 2

Q 14.4: Vortrag

Montag, 24. März 2003, 17:15–17:30, F303

A Bose-Einstein Condensate in an Atom Chip — •A. Kasper, Ch. vom Hagen, M. Rückel, St. Schneider, Th. Straßel, L. Feenstra, and J. Schmiedmayer — Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany

In this talk we present the successful creation of a Bose Einstein condensate (BEC) in a magnetic micro trap. In the setup we use a two-layered structure to generate the magnetic traps: one layer is based on ‘large scale’ (mm) micro traps (an H-shaped copper structure) enabling U-(quadrupole) and Z-(Ioffe-Pritchard) traps, by simply addressing different ports of the H-structure. The second layer is the atom chip, where the main experiments will take place. We want to point out that the atom chips for different experiments can be exchanged without changing the loading, trapping and cooling procedure in the H-structure, as this setup gives us the possibility to create a BEC close to, but independent of the surface (atom chip). The experimental procedure leading to the BEC in the H-structure is described in detail. The BEC and its properties in this structure are studied. First experiments investigating excitations of the BEC are presented. Next the transfer of the BEC from the H-structure to the atom chip is shown in detail. Furthermore, we study the trap properties and the BEC on the atom chip. Acknowledgements: atom chip: R. Folman (design); Weizmann Institute of Science, Israel (fabrication). Funding: DFG (SCHM 1599/2-1), EU (ACQUIRE), A.v.Humboldt Stiftung (LF)