Berlin 2005 – wissenschaftliches Programm
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DY: Dynamik und Statistische Physik
DY 31: Nonlinear Stochastic Systems I
DY 31.9: Vortrag
Montag, 7. März 2005, 12:30–12:45, TU H2032
Analysis of the Dynamics of Dissipative Solitons using Stochastic Data Analysis — •Hans-Georg Purwins1, Hendrik U. Bödeker1, and Andreas W. Liehr1,2 — 1Institut für Angewandte Physik, WWU Münster, Corrensstr. 2/4, 48149 Münster — 2Freiburger Materialforschungszentrum, Stefan-Meier-Str. 21, 79104 Freiburg
In this talk, we focus on the dynamics of solitary particle-like structures in nonlinear dissipative systems referred to as dissipative solitons (DSs). We consider theoretical prediction like intrinsic propagation, interaction and formation of molecules or clusters. The theoretical predictions are compared to experimental results obtained from planar gas-discharge systems. As strong fluctuations are present in the experimental system, the dynamics has to be modeled by stochastic differential equations in the form of a Langevin equation. On this background methods of stochastic data analysis are developed that allow for a quantitative separation of the deterministic and the stochastic part of the dynamics. Processing experimental data by this method, theoretical predictions with respect to the transition from a stationary to intrinsically propagating DSs and their interaction law can be verified. The latter is consistent with the locking distances of DSs in the observed molecules.