title: Mixtures of strongly interacting bosons in optical lattices.
abstract: We investigate the properties of strongly interacting heteronuclear boson-boson mixtures loaded in realistic optical lattices, with particular emphasis on the physics of interfaces. In particular, we numerically reproduce the recent experimental observation that the addition of a small fraction of 41K induces a significant loss of coherence in 87Rb, providing a simple explanation. We then investigate the robustness against the inhomogeneity typical of realistic experimental realizations of the glassy quantum emulsions recently predicted to occur in strongly interacting boson-boson mixtures on ideal homogeneous lattices.
authors.affiliation: C.N.I.S.M. and Dipartimento di Fisica, Politecnico di Torino, C.so Duca degli Abruzzi 24, I-10129 Torino, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Buonsante
authors.forename: S M
authors.initials: SM
authors.lastname: Giampaolo
authors.forename: F
authors.initials: F
authors.lastname: Illuminati
authors.forename: V
authors.initials: V
authors.lastname: Penna
authors.forename: A
authors.initials: A
authors.lastname: Vezzani