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Ground State Density Distribution of Bose-Fermi Mixture in a One-Dimensional Harmonic Trap

Hao, Ya Ya, Jiang

Chinese Physics LettersJan 1, 20111 citation

Theoretical Study of Li-Cs Degenerate Trapped Fermi-Bose Mixtures

Han Fu, F. Setiawan, Kathryn Levin

Bulletin of the American Physical SocietyMar 9, 20180 citations

Tuning of Heteronuclear Interactions in a Degenerate Fermi-Bose Mixture

Silke Ospelkaus, C. Ospelkaus, Leif Humbert +2 more

We demonstrate tuning of interactions between fermionic 40K and bosonic 87Rb atoms by Feshbach resonances and access the complete phase diagram of the harmonically trapped mixture from phase separation to collapse. On the attractive side of the resonance, we observe a strongly enhanced mean-field energy of the condensate due to the mutual mean-field confinement, predicted by a Thomas-Fermi model. As we increase heteronuclear interactions beyond a threshold, we observe an induced collapse of the mixture. On the repulsive side of the resonance, we observe vertical phase separation of the mixture in the presence of the gravitational force, thus entering a completely unexplored part of the phase diagram of the mixture. In addition, we identify the 515 G resonance as p wave by its characteristic doublet structure.We demonstrate tuning of interactions between fermionic 40K and bosonic 87Rb atoms by Feshbach resonances and access the complete phase diagram of the harmonically trapped mixture from phase separation to collapse. On the attractive side of the resonance, we observe a strongly enhanced mean-field energy of the condensate due to the mutual mean-field confinement, predicted by a Thomas-Fermi model. As we increase heteronuclear interactions beyond a threshold, we observe an induced collapse of the mixture. On the repulsive side of the resonance, we observe vertical phase separation of the mixture in the presence of the gravitational force, thus entering a completely unexplored part of the phase diagram of the mixture. In addition, we identify the 515 G resonance as p wave by its characteristic doublet structure.

arXiv:cond-mat/0607091Physical Review LettersSep 18, 2006166 citations

Heteronuclear quantum gas mixtures

C. Ospelkaus, S Ospelkaus

This PhD tutorial article is a review of our experiments on heteronuclear quantum gas mixtures at the University of Hamburg. We introduce basic properties of trapped Fermi-Bose mixtures and demonstrate the achievement of large quantum degenerate mixtures of 40K and 87Rb. Using heteronuclear Feshbach resonances, we show how the heteronuclear interaction can be tuned, allowing us to induce phase separation and collapse for large repulsive and attractive interactions, respectively. We realize Fermi-Bose mixtures in 3D optical lattices as a novel quantum many-body system and study coherence properties of the mixture. Combining our experiments on lattices and Feshbach resonances, we present the first realization of ultracold heteronuclear Feshbach molecules. The molecules are created at individual sites of a 3D optical lattice. We discuss lifetime, binding energy and rf association efficiency in terms of a universal model and give an outlook for possible future developments.This PhD tutorial article is a review of our experiments on heteronuclear quantum gas mixtures at the University of Hamburg. We introduce basic properties of trapped Fermi-Bose mixtures and demonstrate the achievement of large quantum degenerate mixtures of 40K and 87Rb. Using heteronuclear Feshbach resonances, we show how the heteronuclear interaction can be tuned, allowing us to induce phase separation and collapse for large repulsive and attractive interactions, respectively. We realize Fermi-Bose mixtures in 3D optical lattices as a novel quantum many-body system and study coherence properties of the mixture. Combining our experiments on lattices and Feshbach resonances, we present the first realization of ultracold heteronuclear Feshbach molecules. The molecules are created at individual sites of a 3D optical lattice. We discuss lifetime, binding energy and rf association efficiency in terms of a universal model and give an outlook for possible future developments.

arXiv:0808.4147Journal of Physics B Atomic Molecular and Optical PhysicsOct 1, 20089 citations

Equilibrium and Dynamics of a Bose-Fermi Quantum Mixture with Strong Mass Imbalance

Krutik Patel, B. J. DeSalvo, Geyue Cai +1 more

Bulletin of the American Physical SocietyMay 29, 20180 citations

Two-Species Mixture of Quantum Degenerate Fermi and Bose Gases

Zoran Hadzibabic, Claudiu A. Stan, Kai Dieckmann +4 more

APSMay 1, 20020 citations

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