Regensburg 2010 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 29: Spatially Extended Dynamical Systems
DY 29.8: Vortrag
Donnerstag, 25. März 2010, 15:45–16:00, H46
Directed transport in phase-modulated driven lattices — •Christoph Petri1, Florian Lenz1, Fotis Diakonos2, and Peter Schmelcgher1 — 1Zentrum für Optische Quantentechnologien, Universität Hamburg — 2Department of Physics, University of Athens
An analysis of the dynamics of non-interacting particles in a phase-modulated one-dimensional lattice formed by laterally oscillating square potentials is presented. Depending on the properties of the modulation a desymmetrization of phase space occurs, which is based on breaking locally time- reverse and space-invert symmetries. This yields a directed current of particles, whose direction and magnitude is tunable by varying the parameters of the system. Furthermore, the particles show different localization behavior depending on their spatial position if the global height of the potential is chosen appropriately.