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Deeply bound ultracold molecules in an optical lattice
Johann G. Danzl, Manfred J. Mark, Elmar Haller +5
We demonstrate efficient transfer of ultracold molecules into a deeply bound rovibrational level of the singlet ground state potential in the presence of an optical lattice. The ov…
Interference of interacting matter waves
Mattias Gustavsson, Elmar Haller, Manfred J. Mark +4
The phenomenon of matter wave interference lies at the heart of quantum physics. It has been observed in various contexts in the limit of non-interacting particles as a single part…
Precision molecular spectroscopy for ground state transfer of molecular quantum gases
Johann G. Danzl, Manfred J. Mark, Elmar Haller +6
One possibility for the creation of ultracold, high-phase-space-density quantum gases of molecules in the rovibrational ground state relies on first associating weakly-bound molecu…
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…
Metastable Feshbach Molecules in High Rotational States
S. Knoop, M. Mark, F. Ferlaino +4
We experimentally demonstrate Cs2 Feshbach molecules well above the dissociation threshold, which are stable against spontaneous decay on the timescale of one second. An optically…
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…
Evidence for Efimov quantum states in an ultracold gas of cesium atoms
T. Kraemer, M. Mark, P. Waldburger +8
Systems of three interacting particles are notorious for their complex physical behavior. A landmark theoretical result in few-body quantum physics is Efimov's prediction of a univ…