Publications (11)
Pure Gas of Optically Trapped Molecules Created from Fermionic Atoms
S. Jochim, M. Bartenstein, A. Altmeyer +4
We report on the production of a pure sample of up to 3x10^5 optically trapped molecules from a Fermi gas of 6Li atoms. The dimers are formed by three-body recombination near a Fes…
Collective excitations of a degenerate gas at the BEC-BCS crossover
M. Bartenstein, A. Altmeyer, S. Riedl +4
We study collective excitation modes of a fermionic gas of Li atoms in the BEC-BCS crossover regime. While measurements of the axial compression mode in the cigar-shaped trap c…
Dynamics of a strongly interacting Fermi gas: the radial quadrupole mode
A. Altmeyer, S. Riedl, M. J. Wright +3
We report on measurements of an elementary surface mode in an ultracold, strongly interacting Fermi gas of 6Li atoms. The radial quadrupole mode allows us to probe hydrodynamic beh…
Finite-Temperature Collective Dynamics of a Fermi Gas in the BEC-BCS Crossover
M. J. Wright, S. Riedl, A. Altmeyer +4
We report on experimental studies on the collective behavior of a strongly interacting Fermi gas with tunable interactions and variable temperature. A scissors mode excitation in a…
Collective oscillations of a Fermi gas in the unitarity limit: Temperature effects and the role of pair correlations
S. Riedl, E. R. Sanchez Guajardo, C. Kohstall +6
We present detailed measurements of the frequency and damping of three different collective modes in an ultracold trapped Fermi gas of Li atoms with resonantly tuned interactio…
Precise determination of Li cold collision parameters by radio-frequency spectroscopy on weakly bound molecules
M. Bartenstein, A. Altmeyer, S. Riedl +9
We employ radio-frequency spectroscopy on weakly bound Li molecules to precisely determine the molecular binding energies and the energy splittings between molecular states…
Precision Measurements of Collective Oscillations in the BEC-BCS Crossover
A. Altmeyer, S. Riedl, C. Kohstall +6
We report on precision measurements of the frequency of the radial compression mode in a strongly interacting, optically trapped Fermi gas of Li-6 atoms. Our results allow for a te…
Exploring the BEC-BCS Crossover with an Ultracold Gas of Li Atoms
M. Bartenstein, A. Altmeyer, S. Riedl +5
We present an overview of our recent measurements on the crossover from a Bose-Einstein condensate of molecules to a Bardeen-Cooper-Schrieffer superfluid. The experiments are perfo…
Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
M. Bartenstein, A. Altmeyer, S. Riedl +4
We demonstrate a reversible conversion of a Li2 molecular Bose-Einstein condensate to a degenerate Fermi gas of atoms by adiabatically crossing a Feshbach resonance. By optical in…
Note on "Collective Excitations of a Degenerate Gas at the BEC-BCS Crossover", Phys. Rev. Lett. 92, 203201 (2004)
A. Altmeyer, S. Riedl, C. Kohstall +3
We present a reinterpretation of our previous results on the radial compression mode of a degenerate quantum gas in the BEC-BCS crossover in [1]. We show that our former data are c…
Pairing-gap, pseudo-gap, and no-gap phases in the radio-frequency spectra of a trapped unitary 6Li gas
P. Pieri, A. Perali, G. C. Strinati +7
Radio frequency spectra of a trapped unitary 6Li gas are reported and analyzed in terms of a theoretical approach that includes both final-state and trap effects. Final-state effec…