aqora

Repulsively and Attractively Interacting Fermi-Mixtures in Optical Lattices

Lucia Hackermüller

Bulletin of the American Physical SocietyMay 20, 20090 citations

Interacting Bose-Fermi Mixtures in 3D Optical Lattice Potentials

Sebastian Will, Thorsten Best, Simon G. Braun +8 more

Bulletin of the American Physical SocietyMay 28, 20100 citations

Interacting Fermi gases and Bose-Fermi mixtures in optical lattices

Kenneth Günter

Jan 1, 20072 citations

Interacting Fermions and Bose-Fermi mixtures in Optical Lattices

Henning Moritz

Bulletin of the American Physical SocietyMar 7, 20070 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

Role of Interactions in Rb87−K40 Bose-Fermi Mixtures in a 3D Optical Lattice

Th. Best, Sebastian Will, Ulrich Schneider +4 more

We investigate the effect of interspecies interaction on a degenerate mixture of bosonic 87Rb and fermionic 40K atoms in a three-dimensional optical lattice potential. Using a Feshbach resonance, the 87Rb-40K interaction is tuned over a wide range. Through an analysis of the 87Rb momentum distribution, we find a pronounced asymmetry between strong repulsion and strong attraction. In the latter case, we observe a marked shift in the superfluid to Mott insulator transition, which we attribute to a renormalization of the Bose-Hubbard parameters due to self-trapping.We investigate the effect of interspecies interaction on a degenerate mixture of bosonic 87Rb and fermionic 40K atoms in a three-dimensional optical lattice potential. Using a Feshbach resonance, the 87Rb-40K interaction is tuned over a wide range. Through an analysis of the 87Rb momentum distribution, we find a pronounced asymmetry between strong repulsion and strong attraction. In the latter case, we observe a marked shift in the superfluid to Mott insulator transition, which we attribute to a renormalization of the Bose-Hubbard parameters due to self-trapping.

arXiv:0807.4504Physical Review LettersJan 23, 2009160 citations

Repulsively Interacting Fermi-Fermi Mixtures in 3D Optical Lattices

Related papers

Repulsively Interacting Fermi-Fermi Mixtures in 3D Optical Lattices

Related papers