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arXiv · 0706.2781

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

J. Catani·L. De Sarlo·G. Barontini·F. Minardi·M. Inguscio
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Abstract

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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J. Catani, L. De Sarlo, G. Barontini, F. Minardi, M. Inguscio. 2008-01-29. Degenerate Bose-Bose mixture in a three-dimensional optical lattice. https://doi.org/10.1103/physreva.77.011603

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