DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2018 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

DY: Fachverband Dynamik und Statistische Physik

DY 81: Nonlinear Dynamics, Synchronization, Chaos II

DY 81.6: Talk

Friday, March 16, 2018, 11:30–11:45, BH-N 243

Normal and anomalous diffusion in soft Lorentz gases — •Rainer Klages1, Sol Selene Gil Gallegos1, Janne Solanpää2, Mikka Sarvilahti2, and Esa Räsänen21Queen Mary University of London, School of Mathematical Sciences — 2Laboratory of Physics, Tampere University of Technology

Motivated by electronic transport in artificial graphene, we study the diffusion of point particles in a soft periodic Lorentz gas modeled by repulsive Fermi potentials on a triangular lattice. We find that the diffusion coefficient is a highly irregular function of the minimal distance between adjacent scatterers as a control parameter. Parameter regions of normal diffusion alternate with regions exhibiting superdiffusion. The latter are due to islands of periodic orbits in phase space whose origin and structure we explore in detail. The coarse functional form of the parameter-dependent diffusion coefficient is well reproduced by simple random walk models [1].

[1] R.Klages, S.S.G.Gallegos, J.Solanpää, M.Sarvilahti, E.Räsänen, submitted

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2018 > Berlin