Regensburg 2004 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 10: Critical Phenomena

DY 10.1: Hauptvortrag

Montag, 8. März 2004, 09:30–10:00, H2

Critical Dynamics in Pure Fluids and Binary Mixtures — •Reinhard Folk — Institut für Theoretische Physik, Universität Linz, A-4040 Linz, Österreich

The critical behavior of transport coefficients (e.g. thermal conductivity, mass diffusion, shear viscosity) near continuous phase transitions (PT) is still of great interest. In the last years progress has been made on the experimental as well as on the theoretical side, which allows a quantitative comparison between theory and experiment. Such a comparison is presented for the gas-liquid PT, the demixing PT as well as for the suprafluid PT in He4 and He4-He3 mixtures. Especially for this last case the recent field theoretic two loop calculations are presented. In addition light scattering experiments, sound velocity and sound absorption measurements will be discussed shortly.