Abstract
The coupling between order-parameter fluctuations near the wall and depinning fluid interface in the approach to a complete wetting transition is described by a two-field Hamiltonian which improves upon standard capillary-wave models of wetting. We construct a nonlinear renormalization group to study fluctuation effects in d = 3 and show how this elegantly rederives the expression for the renormalized wetting parameter found in earlier (linear) renormalization-group treatments.
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