Hannover 2010 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 69: Ultra-Cold Atoms, Ions and BEC IV / Interaction with VUV and X-Ray Light II (with A)
Q 69.1: Talk
Friday, March 12, 2010, 14:00–14:15, F 303
Hunting for Efimov trimers in a three-component Fermi gas — •Thomas Lompe1,2, Timo Ottenstein1,2, Martin Ries1,2, Friedhelm Serwane1,2, Philipp Simon1,2, Gerhard Zürn1,2, and Selim Jochim1,2 — 1MPI für Kernphysik, Heidelberg — 2Physikalisches Institut, Universität Heidelberg
In the past years Efimov states have been observed in a multitude of bosonic systems. In contrast, we study Efimov physics in a system of three distinguishable fermions with broad, overlapping Feshbach resonances. For each of these Feshbach resonances there exists a shallow dimer state, which creates a much richer system than a single resonance. So far we have found one loss resonance in three-atom- and two resonances in atom-dimer-scattering, which are caused by two Efimov trimers. This should allow for accurate predictions for the binding energies of these trimers. Additionally the fermionic nature of the atoms greatly enhances the stability of the Feshbach molecules, which makes the preparation of atom-dimer mixtures much easier than in bosonic gases. These properties make our system a promising candidate to attempt spectroscopy of Efimov states by RF-association of Efimov trimers.