Degenerate Bose-Bose mixture in a three-dimensional optical lattice

Details Degenerate Bose-Bose mixture in a three-dimensional optical lattice Degenerate Bose-Bose mixture in a three-dimensional optical lattice

2007-06-19

arxiv.org/abs/0706.2781v2

Phys. Rev. A 77, 011603(R) (2008)

Physics

Condensed Matter

Other Condensed Matter

5 pages, 4 figures

Scientific paper

10.1103/PhysRevA.77.011603

We produce a heteronuclear quantum degenerate mixture of two bosonic species, $^{87}$Rb and $^{41}$K, in a three-dimensional optical lattice. On raising the lattice barriers, we observe the disapperance of the inference pattern of the heavier $^{87}$Rb, shifting toward shallower lattice depths in the presence of a minor fraction of $^{41}$K. This effect is sizable and requires only a marginal overlap between the two species. We compare our results with similar findings reported for Fermi-Bose mixtures and discuss the interpretation scenarios proposed to date, arguing that the explanation may be linked to the increased effective mass due to the interspecies interactions.

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