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Observation of interspecies Feshbach resonances in an ultracold Rb-Cs mixture
K. Pilch, A. D. Lange, A. Prantner +4
We report on the observation of interspecies Feshbach resonances in an ultracold, optically trapped mixture of Rb and Cs atoms. In a magnetic field range up to 300 G we find 23 int…
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…
`Stückelberg interferometry' with ultracold molecules
M. Mark, T. Kraemer, P. Waldburger +4
We report on the realization of a time-domain `Stückelberg interferometer', which is based on the internal state structure of ultracold Feshbach molecules. Two subsequent passages…
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…