Effect of dispersion forces on the capillary-wave fluctuations of liquid surfaces.

Physical review. E, Statistical, nonlinear, and soft matter physics

PubMedID: 24827259

Chacón E, Fernández EM, Tarazona P. Effect of dispersion forces on the capillary-wave fluctuations of liquid surfaces. Phys Rev E Stat Nonlin Soft Matter Phys. 2014;89(4):042406.
We present molecular dynamics evidence for the nonanalytic effects of the long-range dispersion forces on the capillary waves fluctuations of a Lennard-Jones liquid surface. The results of the intrinsic sampling method, for the analysis of the instantaneous interfacial shape, are obtained in large systems for several cut-off distances of the potential tail, and they show good agreement with the theoretical prediction by Napiórkowski and Dietrich, based on a density functional analysis. The enhancement of the capillary waves is quantified to be within 1% for a simple liquid near its triple point.