Dresden 2020 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 48: Statistical Physics far from Thermal Equilibrium

DY 48.5: Vortrag

Donnerstag, 19. März 2020, 10:30–10:45, ZEU 147

Diffusion System with Lorentz Force — •Iman Abdoli1, Hidde Derk Vuijk1, Holger Merlitz1, Jens-Uwe Sommer1, 2, Joseph Michael Brader3, and Abhinav Sharma1, 21Leibniz-Institut für Polymerforschung Dresden, Institut Theorie der Polymere, 01069 Dresden, Deutschland — 2Technische Universität Dresden, Institut für Theoretische Physik, 01069 Dresden, Deutschland — 3Department de Physique, Université de Fribourg, CH-1700 Fribourg, Suisse

In the presence of Lorentz force arising from an external magnetic field the Fokker-Planck equation picks up a tensorial coefficient, which reflects the anisotropy of the particle's motion. Lorentz force gives rise to diffusive or irrotational fluxes and Brownian vortexes or solenoidal fluxes along and perpendicular to the density gradients, respectively. We first study the systems in which these Brownian vortexes can be ignored in the time evolution of the density. We then investigate how these vortexes influence the probability density function (or PDF) of the particle's positions in the nonequilibrium stationary state of a diffusion system under stochastic resetting with Lorentz force. Next, we show, analytically and computationally, that the solenoidal fluxes persist in the stationary state of a diffusive system with two different temperatures.

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