Regensburg 2010 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 20: Phase Transitions and Critical Phenomena I
DY 20.5: Vortrag
Mittwoch, 24. März 2010, 15:30–15:45, H47
The thermodynamic Casimir effect in the neighbourhood of the λ-transition: A Monte Carlo study of an improved three-dimensional lattice model — •Martin Hasenbusch — Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany
We discuss the thermodynamic Casimir effect in thin films in the three dimensional XY universality class. Based on the results of Monte Carlo simulations of an improved lattice model we compute the universal finite size scaling function θ that characterizes the behaviour of the thermodynamic Casimir force in the neighbourhood of the critical point. We discuss corrections to the universal finite size scaling behaviour. We compare with experiments on films of 4He near the λ-transition, previous Monte Carlo simulations of the XY model on the simple cubic lattice and field-theoretic results.