title: Effect of interactions on harmonically confined Bose-Fermi mixtures in optical lattices.
abstract: We investigate a Bose-Fermi mixture in a three-dimensional optical lattice, trapped in a harmonic potential. Using generalized dynamical mean-field theory, which treats the Bose-Bose and Bose-Fermi interaction in a fully nonperturbative way, we show that for experimentally relevant parameters a peak in the condensate fraction close to the point of vanishing Bose-Fermi interaction is reproduced within a single-band framework. We identify two physical mechanisms contributing to this effect: the spatial redistribution of particles when the interspecies interaction is changed and the reduced phase space for strong interactions, which results in a higher temperature at fixed entropy.
authors.affiliation: Institute for Theoretical Physics, University of Amsterdam, 1090 GL Amsterdam, The Netherlands.
authors.forename: Michiel
authors.initials: M
authors.lastname: Snoek
authors.forename: Irakli
authors.initials: I
authors.lastname: Titvinidze
authors.forename: Immanuel
authors.initials: I
authors.lastname: Bloch
authors.forename: Walter
authors.initials: W
authors.lastname: Hofstetter