Berlin 2008 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
DY: Fachverband Dynamik und Statistische Physik
DY 29: Poster II
DY 29.41: Poster
Donnerstag, 28. Februar 2008, 16:00–18:00, Poster C
Interfaces in Three-Dimensional Ising-like Systems — •Michael Köpf and Gernot Münster — Institut für Theoretische Physik, Universität Münster, Wilhelm-Klemm-Str. 9, 48149 Münster
We consider interfaces in systems belonging to the universality class of the three-dimensional Ising model. They can be described in the framework of the broken-symmetry phase of three-dimensional φ4-theory. A proper choice of boundary conditions enforces the existence of an interface, which in mean-field theory resembles the well-known Cahn-Hilliard profile. To include thermal fluctuations to first order in the semiclassical approximation, an equation of motion for the interfacial profile is derived via the effective action formalism. The renormalized solution to this equation yields an interface which is shown to exhibit the behaviour predicted by capillary wave theory, i.e. the interfacial thickness diverges logarithmically with increasing system size. Ensuing a detailed investigation of interfacial features we estimate the region of validity of the approximation.