Observation of an Efimov resonance in an ultracold mixture of atoms and weakly bound dimers

Details Observation of an Efimov resonance in an ultracold mixture of atoms and weakly bound dimers Observation of an Efimov resonance in an ultracold mixture of atoms and weakly bound dimers

2009-07-26

arxiv.org/abs/0907.4510v1

J. Phys.: Conf. Ser. 194, 012064 (2009)

Physics

Condensed Matter

Quantum Gases

Conference Proceeding ICPEAC 2009 Kalamazoo, to appear in Journal of Physics: Conference Series

Scientific paper

10.1088/1742-6596/194/1/012064

We discuss our recent observation of an atom-dimer Efimov resonance in an ultracold mixture of Cs atoms and Cs_2 Feshbach molecules [Nature Phys. 5, 227 (2009)]. We review our experimental procedure and present additional data involving a non-universal g-wave dimer state, to contrast our previous results on the universal s-wave dimer. We resolve a seeming discrepancy when quantitatively comparing our experimental findings with theoretical results from effective field theory.

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