Simulation of the magnetoresistance of ultracold atomic Bose gases in bichromatic lattices

Abstract

We present a theoretical study of the two-dimensional ultracold Bose gas in the presence of disorder and bichromatic pseudodisorder in an optical lattice, to which we apply a synthetic magnetic field. We demonstrate that, in the ballistic-transport regime, this leads to positive magnetoresistance and that, in the diffusive and strong-localization regimes, can also lead to negative magnetoresistance. We propose experimental scenarios to observe these effects. © 2013 American Physical Society.