Isotope dependent interactions in a mixture of ultracold atoms [Elektronische Ressource] / vorgelegt von Florian Baumer

Isotope dependent interactionsin a mixture of ultracold atomsInaugural-DissertationzurErlangung des Doktorgrades derMathematisch-Naturwissenschaftlichen Fakult¨atder Heinrich-Heine-Universit¨at Du¨sseldorfvorgelegt vonFlorian Baumeraus Lauingen a.d DonauM¨arz 2010Aus dem Institut fur¨ Experimentalphysikder Heinrich-Heine-Universit¨at Dus¨ seldorfGedruckt mit der Genehmigung derMathematisch-Naturwissenschaftlichen Fakult¨at derHeinrich-Heine-Universit¨at Dus¨ seldorfReferent: Prof. Dr. Axel G¨orlitzKoreferent: Prof. Dr. Georg PretzlerTag der mundlichen¨ Prufung:¨ 29.04.2010SummaryWithin the scope of this thesis, comprehensive experimental studies on interspecies inter-87actions between Rb and various isotopes of Yb at temperatures in the K regime have87been performed. The interactions between Yb and Rb manifested themselves through174 87interspeciesthermalizationand–inthecaseof Yband Rb–throughphaseseparation.Both, Yb and Rb, are well suited for the application of laser cooling, and quantumdegeneracy has been reached for Yb as well as for Rb [1, 2]. In the context of mixturesof ultracold atoms, the combination of Yb and Rb is an interesting system, which hasnot been investigated so far. Due to the availability of several stable Yb isotopes, Bose-Bose mixtures as well as Bose-Fermi mixtures can be realized.