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DY: Fachverband Dynamik und Statistische Physik

DY 10: Posters I

DY 10.34: Poster

Montag, 14. März 2011, 17:00–19:00, P4

Pattern deposition in driven lattices — •Benno Liebchen, Christoph Petri, Florian Lenz, and Peter Schmelcher — Zentrum für optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany

The nonlinear dynamics of classical, noninteracting particles in a one-dimensional lattice of laterally driven square potentials is studied, by means of exact numerical simulation.

We demonstrate two different mechanisms for the creation of controllable pattern-like particle-localization. Apparently, this is not possible in a system of static barriers, since trapping would prohibit the coexistence of diffusion there. By instantly increasing the barrier-potential in a periodic lattice with nonlinear phase-gradients, we observe the development from a uniform particle-distribution to a pattern-like structure. The mechanism is explained by symmetry considerations. Within a lattice with spatially varying barrier-frequency, transient global patterns are created and frozen via an instant increase of the barrier-potential.