Dynamical Effects of Disorder in Optical Lattices

Matthew C. Beeler, E.E. Edwards, Tao Hong +1 more

Fernanda Pinheiro

B. Tanatar, Gao Xianlong, Marco Polini +1 more

Georg A. Raithel, G. Birkl, William D. Phillips +1 more

Jeremy B. Reeves, Bryce Gadway, T. H. Bergeman +2 more

We investigate the interplay of disorder and interactions in the accelerated transport of a Bose–Einstein condensate through an incommensurate optical lattice. We show that interactions can effectively cancel the damping of Bloch oscillations (BOs) due to the disordered potential and we provide a simple model to qualitatively capture this screening effect. We find that the characteristic interaction energy, above which interactions and disorder cooperate to enhance, rather than reduce, the damping of BOs, coincides with the average disorder depth. This is consistent with results of a mean-field simulation.

Hannes Pichler, Johannes Schachenmayer, Jonathan Simon +2 more

We show how a dressed lattice scheme can provide control over certain types of noise for atomic quantum gases in the lowest band of an optical lattice, removing the effects of global lattice amplitude noise to first order for particular choices of the dressing field parameters. We investigate the nonequilibrium many-body dynamics of bosons and fermions induced by noise away from this parameter regime, and show how the same technique can reduce spatial disorder in projected lattice potentials.