Biased diffusion in a one-dimensional adsorbed monolayer

We study the dynamics of a probe particle, which performs biased diffusive motion in a one-dimensional adsorbed monolayer composed of mobile hardcore particles undergoing continuous exchanges with a vapor phase. In terms of a mean-field-type approach, based on the decoupling of the third-order correlation functions into the product of pairwise correlations, we determine analytically the density profiles of the monolayer particles, as seen from the stationary moving probe, and calculate the terminal velocity V-pr, mobility mu(pr) and the selfdiffusion coefficient D-pr of the probe. Our analytical results are confirmed by Monte Carlo simulations.