We produce a heteronuclear quantum degenerate mixture of two bosonic species, 87Rb and 41K, in a three-dimensional optical lattice. On raising the lattice barriers, we observe the disappearance of the inference pattern of the heavier 87Rb, shifting toward shallower lattice depths in the presence of a minor fraction of 41K. 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.
Degenerate Bose-Bose mixture in a three-dimensional optical lattice / J. Catani; L. De Sarlo; G. Barontini; F. Minardi; M. Inguscio. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - STAMPA. - 77:(2008), pp. 011603-1-011603-4. [10.1103/PhysRevA.77.011603]
Degenerate Bose-Bose mixture in a three-dimensional optical lattice
CATANI, JACOPO;DE SARLO, LUIGI;BARONTINI, GIOVANNI;MINARDI, FRANCESCO;INGUSCIO, MASSIMO
2008
Abstract
We produce a heteronuclear quantum degenerate mixture of two bosonic species, 87Rb and 41K, in a three-dimensional optical lattice. On raising the lattice barriers, we observe the disappearance of the inference pattern of the heavier 87Rb, shifting toward shallower lattice depths in the presence of a minor fraction of 41K. 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.File | Dimensione | Formato | |
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