Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 58: Poster: Quantum Optics and Photonics IV
Q 58.88: Poster
Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof
Heteronuclear Spin-Changing-Collisions in Li-Na mixtures — •Arno Trautmann, Fabián Olivares, Marcell Gall, Fred Jendrzejewski, and Markus K. Oberthaler — Kirchhoff-Institut für Physik, Im Neuenheimer Feld 227, 69120 Heidelberg
Homonuclear Spin-Changing-Collisions are a well-known tool in ultracold atomic samples to study entanglement, magnetism and the rich field of both bosonic and fermionic spinor physics. Spin-Changing-Collisions of atoms with different species can extend these tools even further to investigate collective effects of spinor mixtures. We present first results on heteronuclear Bose-Bose Spin-Dynamics in the 7Li-Na mixtures as well as in the Fermi-Bose 6Li-Na mixture. The heteronuclear Bose-Bose system has the advantage that no dressing is needed to achieve energetic degeneracy due to the different quadratic Zeeman shift. The Fermi-Bose case, however, poses large experimental challenges since the energy-dependence on the magnetic field is of linear order, which requires high stability of magnetic fields.
Since the spin-exchange term for all these processes depends on the scattering lengths of the molecular states, we also present the first measurement of the Feshbach spectrum of 7Li-Na which reveals a 1 G broad resonance at 150 G.