Hamburg 2009 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 15: Poster I

A 15.29: Poster

Dienstag, 3. März 2009, 16:30–19:00, VMP 9 Poster

Superconducting Microtraps for Cold Atom Experiments — •Florian Jessen, Daniel Cano, Brian Kash, Helge Hattermann, Max Kahmann, Dieter Kölle, Reinhold Kleiner, Claus Zimmermann, and József Fortágh — Center for Collective Quantum Phenomena and their Applications, Auf der Morgenstelle 14, 72076 Tübingen

We report on the realization and characterization of an experimental system to produce Bose-Einstein Condensates in a superconducting chip. Ultracold ⁸⁷Rb atomic clouds are produced in a magneto-optical trap and further cooled by evaporative cooling in an Ioffe trap. The atoms are transported from the Ioffe trap to the superconducting chip by means of optical tweezers. The superconducting chip is attached to the cold finger of a Helium-flow cryostat. We show recently-built superconducting chips that have been designed to minimize the impact of the Meissner effect on the magnetic potentials. In general, the Meissner effect reduces the trap depth as this is brought close to the superconducting surface [1]. These chip structures will allow experimental studies on interactions between superconductors and ultracold atom clouds. [1] D. Cano et al., Phys. Rev. A 77, 063408 (2008)