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Observation of an Efimov-like resonance in ultracold atom-dimer scattering
S. Knoop, F. Ferlaino, M. Mark +4
The field of few-body physics has originally been motivated by understanding nuclear matter. New model systems to experimentally explore few-body quantum systems can now be realize…
Quantum Gas of Deeply Bound Ground State Molecules
Johann G. Danzl, Elmar Haller, Mattias Gustavsson +6
We create an ultracold dense quantum gas of ground state molecules bound by more than 1000 wavenumbers by stimulated two-photon transfer of molecules associated on a Feshbach reson…
Control of Interaction-Induced Dephasing of Bloch Oscillations
M. Gustavsson, E. Haller, M. J. Mark +3
We report on the control of interaction-induced dephasing of Bloch oscillations for an atomic Bose-Einstein condensate in an optical lattice under the influence of gravity. When tu…
Spectroscopy of Ultracold, Trapped Cesium Feshbach Molecules
M. Mark, F. Ferlaino, S. Knoop +5
We explore the rich internal structure of Cs_2 Feshbach molecules. Pure ultracold molecular samples are prepared in a CO_2-laser trap, and a multitude of weakly bound states is pop…
Experimental Evidence for Efimov Quantum States
H. -C. Naegerl, T. Kraemer, M. Mark +8
Three interacting particles form a system which is well known for its complex physical behavior. A landmark theoretical result in few-body quantum physics is Efimov's prediction of…