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Degenerate Bose-Bose mixture in a three-dimensional optical lattice (Articolo in rivista)

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Degenerate Bose-Bose mixture in a three-dimensional optical lattice (Articolo in rivista) (literal)

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Alternative label

Catani, J; De Sarlo, L; Barontini, G; Minardi, F; Inguscio, M (2008)
Degenerate Bose-Bose mixture in a three-dimensional optical lattice
in Physical review. A
(literal)

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\"[Catani, J.; De Sarlo, L.; Barontini, G.] Univ Florence, European Lab Nonlinear Spect, LENS, I-50019 Florence, Italy; [Catani, J.; De Sarlo, L.; Barontini, G.] Univ Florence, Dipartimento Fis, I-50019 Florence, Italy; [Minardi, F.; Inguscio, M.] CNR INFM, I-50019 Florence, Italy; [Minardi, F.; Inguscio, M.] Ist Nazl Fis Nucl, I-50019 Florence, Italy (literal)

Titolo

Abstract

We produce a heteronuclear quantum degenerate mixture of two bosonic species, Rb-87 and K-41, in a three-dimensional optical lattice. On raising the lattice barriers, we observe the disappearance of the inference pattern of the heavier Rb-87, shifting toward shallower lattice depths in the presence of a minor fraction of K-41. 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. (literal)

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