Waiting and Residence Times of Brownian Interface Fluctuations

Details Waiting and Residence Times of Brownian Interface Fluctuations Waiting and Residence Times of Brownian Interface Fluctuations

2007-10-27

arxiv.org/abs/0710.5217v1

Physics

Condensed Matter

Statistical Mechanics

5 figures

Scientific paper

We report on the residence times of capillary waves above a given height $h$ and on the typical waiting time in between such fluctuations. The measurements were made on phase separated colloid-polymer systems by laser scanning confocal microscopy. Due to the Brownian character of the process, the stochastics vary with the chosen measurement interval $\Delta t$. In experiments, the discrete scanning times are a practical cutoff and we are able to measure the waiting time as a function of this cutoff. The measurement interval dependence of the observed waiting and residence times turns out to be solely determined by the time dependent height-height correlation function $g(t)$. We find excellent agreement with the theory presented here along with the experiments.

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