title: Density-dependent synthetic gauge fields using periodically modulated interactions.
abstract: We show that density-dependent synthetic gauge fields may be engineered by combining periodically modulated interactions and Raman-assisted hopping in spin-dependent optical lattices. These fields lead to a density-dependent shift of the momentum distribution, may induce superfluid-to-Mott insulator transitions, and strongly modify correlations in the superfluid regime. We show that the interplay between the created gauge field and the broken sublattice symmetry results, as well, in an intriguing behavior at vanishing interactions, characterized by the appearance of a fractional Mott insulator.
authors.affiliation: Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstrasse 2, DE-30167 Hannover, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Greschner
authors.affiliation: Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstrasse 2, DE-30167 Hannover, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Sun
authors.affiliation: Engineering Product Development, Singapore University of Technology and Design, 20 Dover Drive, 138682 Singapore and Merlion MajuLab, CNRS-UNS-NUS-NTU International Joint Research Unit, UMI 3654, Singapore.
authors.forename: D
authors.initials: D
authors.lastname: Poletti
authors.affiliation: Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstrasse 2, DE-30167 Hannover, Germany.
authors.forename: L
authors.initials: L
authors.lastname: Santos