Dissipationless Directed Transport in Rocked Single-Band Quantum Dynamics

Details Dissipationless Directed Transport in Rocked Single-Band Quantum Dynamics Dissipationless Directed Transport in Rocked Single-Band Quantum Dynamics

2007-02-28

arxiv.org/abs/cond-mat/0702668v1

Phys. Rev. A 75, 033602 (2007)

Physics

Condensed Matter

Other Condensed Matter

8 pages, 5 figures, to appear in Physical Review A, March 2007

Scientific paper

10.1103/PhysRevA.75.033602

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 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.

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