Dresden 2014 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 41: Poster - Pattern/ Nonlinear Dyn./ Fluids/ Granular/ Critical Phen.

DY 41.47: Poster

Donnerstag, 3. April 2014, 17:00–19:00, P3

Direct simulation of critical Casimir forces — •Hendrik Hobrecht and Fred Hucht — Fakultät für Physik, Universität Duisburg-Essen, 47048 Duisburg

Using a Monte Carlo simulation, critical Casimir forces in a two-dimensional Ising spin system are examined. The system is divided into two subsystems by a movable wall parallel to fixed top and bottom boundary conditions. Due to the antisymmetric boundary conditions of the subsystems, counteracting repulsive forces bring the wall in a position of equilibrium. The critical Casimir force and the universal Casimir amplitude are determined from the distribution function of the wall position and compared to exactly known results.