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Regensburg 2010 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 6: Poster Session I

DY 6.43: Poster

Monday, March 22, 2010, 16:00–18:00, Poster B2

Diffusion in a finite, non-isotropic Anderson model — •Hendrik Niemeyer1 and Robin Steinigeweg21University of Osnabrueck, Physics Departement, Germany — 2University of Braunschweig, Physics Departement, Germany

We investigate the existence of diffusive dynamics at various wavelengths in a single-particle 3D Anderson model by solving the full time-dependent Schroedinger equation. This model features a coarse-grained structure: The lattice is divided into layers and the hoppings between layers differ from the hoppings within the layers. Criterions for the transport behaviour of the system are introduced by analyzing the time evolution of the expectation value of the Fourier components of the spatial particle density. We come to the conclusion that a diffusive corridor w.r.t. wavelengths exists featuring the same diffusion constant for every energy interval. This confirms results from the time-convolutionless projection operator technique applied to the same model.

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