Dissipationless directed transport in rocked single-band quantum dynamics

Jiangbin Gong, Dario Poletti, Peter Hanggi
2007 Physical Review A. Atomic, Molecular, and Optical Physics  
Using matter waves that are trapped in a deep optical lattice, dissipationless directed transport is demonstrated to occur if the single-band quantum dynamics is periodically tilted on one half of the lattice by a monochromatic field. Most importantly, the directed transport can exist for almost all system parameters, even after averaged over a broad range of single-band initial states. The directed transport is theoretically explained within ac-scattering theory. Total reflection phenomena
more » ... ction phenomena associated with the matter waves travelling from a tilting-free region to a tilted region are emphasized. The results are of relevance to ultracold physics and solid-state physics, and may lead to powerful means of selective, coherent, and directed transport of cold particles in optical lattices.
doi:10.1103/physreva.75.033602 fatcat:5t26ktn6tvbxrc2ft73mve44w4