Superfluidity of Interacting Bosonic Mixtures in Optical Lattices

Abstract

We report the observation of many-body interaction effects for a homonuclear bosonic mixture in a three-dimensional optical lattice with variable state dependence along one axis. Near the superfluid-to-Mott insulator transition for one component, we find that the presence of a second component can reduce the apparent superfluid coherence, most significantly when it either experiences a strongly localizing lattice potential or none at all. We examine this effect by varying the relative populations and lattice depths, and discuss the observed behavior in view of recent proposals for scattering from impurities and of atom-phonon coupling for atoms immersed in a superfluid.

4 pages, 3 figures

References in corpus (12)

• Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms
• Bose-Fermi Mixtures in a Three-dimensional Optical Lattice
• Localization of bosonic atoms by fermionic impurities in a 3d optical lattice
• Degenerate Bose-Bose mixture in a three-dimensional optical lattice
• Role of interactions in 87Rb-40K Bose-Fermi mixtures in a 3d optical lattice
• Spatial correlations of trapped 1d bosons in an optical lattice
• Self-localized impurities embedded in a one dimensional Bose-Einstein condensate and their quantum fluctuations
• Dissipative Quantum Ising model in a cold atomic spin-boson mixture
• Mixtures of strongly interacting bosons in optical lattices
• Gutzwiller approach to the Bose-Hubbard model with random local impurities
• Bose-Einstein condensation in an optical lattice
• Versatile transporter apparatus for experiments with optically trapped Bose-Einstein condensates

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