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Spin Dynamics and Feshbach Resonances in Ultracold Sodium-Lithium Mixtures

This thesis presents the investigation of the two-body scattering properties of cold atoms in sodium and lithium-sodium mixtures and their effects on the many body dynamics. Since both species are alkali atoms, the combined spin of both unpaired electrons can be either zero or one, providing two different scattering channels. The coupling of bound molecular states in these channels with the fre...

Feshbach Resonances and Periodic Potentials in Ultracold Bose-Fermi Mixtures

This thesis investigates the possibilities to experimentally realize strongly correlated quantum systems by means of the sodium-lithium Bose-Fermi mixture. For that purpose, we have studied the intraspecies interactions of sodium as well as the interspecies interactions within the mixture. With a quantitative analysis of the sodium Feshbach spectrum, we were able to refine its scattering proper...

Feshbach resonances in ultracold mixtures of the fermionic quantum gases

Magnetically tunable Feshbach resonances in ultracold Li-Yb mixtures.

We investigate the possibility of forming Li+Yb ultracold molecules by magnetoassociation in mixtures of ultracold atoms. We find that magnetically tunable Feshbach resonances exist, but are extremely narrow for even-mass ytterbium isotopes, which all have zero spin. For odd-mass Yb isotopes, however, there is a new mechanism due to hyperfine coupling between the electron spin and the Yb nuclea...

Feshbach Resonances in Ultracold Bose - Fermi Mixtures by Daniele

Date The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. In the wake of successful experiments in Fermi condensates, experimental attention is broadening to include resonant interactions in degenerate Bose-Fermi mixtures. In this thesis we wi...