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Bose-Einstein-Kondensate in Mikrochip-Fallen

Abstract : This thesis decribes for the first time the production of a Bose-Einstein condensate in a microelectronic chip trap. This kind of trap relies on magnetic fields generated by current carrying wires on a microelectronic chip. The properties of these traps, especially the high magnetic field gradients and curvatures, made it possible to achieve Bose-Einstein condensation in less than a second of evaporative cooling, which is about one order of magnitude less than the cooling time in usual magnetic traps and a factor of three less than the so-far fastest way in an optical dipole trap. For this reason, the experimental demands to reach Bose-Einstein condensation are significanntly lowered, especially the vacuum system and the laser setup are much simplified.

Furthermore, the Bose-Einstein condensate is non-destructively transported along the chip surface over macroscopic distances. Also, the condensate is being split into two condensates by magnetic means only for the first time.

These results, namely to manipulate coherent matter in an integrated atom-optical system, foreshadow various applications of chip traps in atom-interferometry, in investigations of low-dimensional quantum gases, and in quatum information processing.
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Contributor : Peter Hommelhoff <>
Submitted on : Thursday, March 4, 2004 - 8:01:37 PM
Last modification on : Friday, July 19, 2019 - 1:15:32 AM
Long-term archiving on: : Friday, April 2, 2010 - 7:36:26 PM


  • HAL Id : tel-00005213, version 1


Peter Hommelhoff. Bose-Einstein-Kondensate in Mikrochip-Fallen. Atomic Physics [physics.atom-ph]. Ludwig-Maximilians-Universität München, 2002. German. ⟨tel-00005213⟩



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