Symmetry and transport in a cold atom ratchet with multifrequency driving

We analyze, both experimentally and via semiclassical Monte Carlo simulations, a cold atom ratchet with multifrequency driving. We investigate the relationship between symmetries and transport both in the case of a periodic driving and in the quasiperiodic limit. We also study quantitatively the line shape and linewidth of the ratchet current, and their dependence on the interaction parameters.