Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics V

Q 62.27: Poster

Thursday, March 8, 2018, 16:15–18:15, Redoutensaal

Feshbach resonances and degenerate quantum mixtures of bosonic sodium and potassium — •Philipp Gersema, Torben Schulze, Torsten Hartmann, Kai Voges, Jannis Schnars, Matthias Gempel, Eberhard Tiemann, Alessandro Zenesini, and Silke Ospelkaus — Institut für Quantenoptik, Leibniz Universität Hannover

Ultracold polar ground state molecules provide an excellent basis for the studies of quantum chemistry and exotic dipolar quantum phenomena. A good and well known starting point for the production of these molecules are ultracold atomic quantum gas mixtures.

Among the alkali atoms, sodium and potassium serve as ideal candidates for the production and investigation of cold molecules. Cooling strategies for both species are well explored, and NaK molecules in their rovibrational ground state feature a large dipole moment as well as chemical stability against exchange reactions.

We present our current effort towards the production of ultracold bosonic ²³Na³⁹K molecules. To this end, we study the scattering properties in different spin states by experimentally observing several magnetic Feshbach resonances and loss minima. These provide us highly tunable tools which we employ to succesfully create quantum degenerate Bose-Bose mixtures. In addition, we describe our progress for the production of Feshbach molecules and the envisioned coherent two-photon pathway into ground state molecules.