Hannover 2013 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 16: Cold Molecules II
MO 16.3: Vortrag
Mittwoch, 20. März 2013, 11:30–11:45, F 107
Multi-channel modelling of NaK — •Torben A. Schulze1, Matthias Gempel1, Torsten Hartmann1, Silke Ospelkaus1, Ivo Temelkov2, Horst Knoeckel1, and Eberhard Tiemann1 — 1Institut für Quantenoptik, Leibniz Universität Hannover, Germany — 2Department of Physics, Sofia University, Bulgaria
Recently, ultracold polar molecules have attracted a lot of interest. Due to their strong dipole-dipole interaction, they are ideally suited for the study of quantum many-body phenomena with long-range and anisotropic interaction. NaK in its rovibronic ground state is a promising candidate for such studies, because of its large dipole moment of 2.72 Debye and because chemical reactions into homonuclear dimers are expected to be endothermic and therefore suppressed at ultracold temperature [PRA 81,060703(2010)]. Experimentally, the preparation of a quantum gas of molecules starts from the preparation of a quantum degenerate mixture of two atomic species, followed by the association of atoms into weakly bound molecules via a Feshbach resonance and a subsequent coherent two-photon transfer from dominantly a3Σ Feshbach molecules into the pure X1Σ rovibronic ground state molecules [Science 322,231(2008)]. Here, we discuss possible coherent two-photon transfer paths from Feshbach molecules to rovibronic ground state molecules. We present an analysis of the electronic ground and K(4p) excited state manifold of 23Na40K and discuss the critical influence of the individual wavefunctions obtained out of our multi-channel calculations and effective transition dipole moments.