The interaction potential used in Eq. (1) for two trap-surface separations at two different time instants. The dashed curve corresponds to a large trap-surface separation where a pronounced barrier is observed, and the solid curve gives the potential at the critical point at which the barrier vanishes. Inset shows the positions of the local minima and maxima of the potential as functions of . Parameter values: , , and .
The height of the potential barrier, , as a function of the trap-surface separation . The solid curve presents the result of exact calculations according to Eq. (1), and the dashed curve shows the scaling behavior given by Eq. (14). Parameter values are the same as those in Fig. 1.
PDF of the jump lengths calculated for two values of the Hamaker constant, (dashed curve and diamonds) and (solid curve and asterisks). Symbols present results of numerical simulations according to the Langevin equation (4) and curves show analytical prediction given by Eq. (16). , , and other parameter values similar to those in Fig. 1.
Variation of the most probable jump length with the pulling velocity . Filled circles present results of numerical simulations according to the Langevin equation (4), the solid curve shows analytical results given by Eq. (18), and the dashed curve is the prediction of the scaling relation (19). The inset compares the most probable jump lengths from theory [Eq. (18)] (dashed curve) and simulations (filled circles) in the vs coordinates. . Other parameter values the same as those in Fig. 1.
Article metrics loading...
Full text loading...