Wandering of a contact line at thermal equilibrium.
We reconsider the problem of the solid-liquid-vapor contact-line on a disordered substrate, in the collective pinning regime. We perform a replica variational calculation which confirms the scaling behavior obtained from Larkin-Imry-Ma-like arguments and provides a quantitative prediction for the correlation function of the line. This prediction is in good agreement with experimental findings for the case of superfluid helium on a caesium substrate.
Hazareesing
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Laboratoire de Physique Théorique de l'Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France.
Mézard
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