Casimir forces in binary liquid mixtures

摘要: If two ore more bodies are immersed in a critical fluid fluctuations of the order parameter generate long ranged forces between these bodies. Due to underlying mechanism close analogues well known Casimir electromagnetism. For special case binary liquid mixture near its demixing transition confined simple parallel plate geometry it is shown that corresponding can be same magnitude as dispersion (van der Waals) plates. In wetting experiments or by direct measurements with an atomic force microscope resulting modification usual regime should therefore easily detectable. Analytical estimates for amplitudes Delta d=4-epsilon compared Monte-Carlo results d=3 and their quantitative effect on thickness layers discussed.