Lateral transport of thermal capillary waves

Details Lateral transport of thermal capillary waves Lateral transport of thermal capillary waves

2009-04-23

arxiv.org/abs/0904.3668v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 6 figures

Scientific paper

We demonstrate that collective motion of interfacial fluctuations can occur at the interface between two coexisting thermodynamic phases. Based on computer simulation results for driven diffusive Ising and Blume-Capel models, we conjecture that the thermal capillary waves at a planar interface travel along the interface if the lateral order parameter current j_op(y) is an odd function of the distance y from the interface and hence possesses opposite directions in the two phases. Such motion does not occur if j_op(y) is an even function of y. A discrete Gaussian interface model with effective dynamics exhibits similiar transport phenomena but with a simpler dispersion relation. These findings open up avenues for controlled interfacial transport on the nanoscale.

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