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 disappearance 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.
Catani J., De Sarlo L., Barontini G., Minardi F., Inguscio M. (2008). Degenerate Bose-Bose mixture in a three-dimensional optical lattice. PHYSICAL REVIEW A, 77(1), 011603-1-011603-4 [10.1103/PhysRevA.77.011603].
Degenerate Bose-Bose mixture in a three-dimensional optical lattice
Minardi F.;
2008
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 disappearance 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
