Frese, Daniel: Bose-Einstein Condensation of Rubidium : Towards Ultracold Binary Bosonic Mixtures. - Bonn, 2005. - Dissertation, Rheinische Friedrich-Wilhelms-Universität Bonn.
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author = {{Daniel Frese}},
title = {Bose-Einstein Condensation of Rubidium : Towards Ultracold Binary Bosonic Mixtures},
school = {Rheinische Friedrich-Wilhelms-Universität Bonn},
year = 2005,
note = {In this thesis, first experiments are reported towards the realization of ultracold Cesium-Rubidium mixtures. In particular, Bose-Einstein condensates (BECs) of Rubidium atoms have been created and combined samples of Rubidium and Cesium have been stored in magneto-optical and magnetic traps.
The presented theoretical framework (chapter 1) covers basic properties of single and double species BECs. Special attention is devoted to few particle systems of one species interacting with a larger quantum degenerated sample of a different species.
The main part of the manuscript (chapters 2, 3) describes our procedure for the creation of the Rubidium BEC and properties of the condensate. The transition to quantum degeneracy is reached with 100000 atoms at a temperature of 300 nK. Characteristic properties of the condensate as an inversion of the aspect ratio upon free expansion and a bimodal density distribution can be clearly observed.
The third part (chapter 4) reports on first experiments with simultaneously trapped cold Cesium and Rubidium atoms. Evidence for the interaction of the two species can be identified in the MOT as well as in a magnetic trap.},

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