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Abstract
Soap films constituting from two surfactant monolayers sandwiching a thin layer of water are investigated. The structure of such films is not static because thermal fluctuations induce corrugations on the monolayers which can be decompose into two principle types of modes: undulation (or bending) modes for which the monolayers oscillate in phase, and squeezing modes for which these oscillations have a 180° phase difference. The eigen-modes spectrum for both types of motions is found. It is shown that the squeezing mode (where the water is pumped back and forth) induces fluctuational (anharmontc) contributions to viscosity and diffusion coefficients which are divergent at large scales, leading to anomalous scaling behavior of the coefficients.