Probability distributions for polymer translocation

We study the passage (translocation) of a self-avoiding polymer through a membrane pore in two dimensions. In particular, we numerically measure the probability distribution Q(T) of the translocation time T, and the distribution P(s,t) of the translocation coordinate s at various times t. When scaled with the mean translocation time < T >, Q(T) becomes independent of polymer length, and decays exponentially for large T. The probability P(s, t) is well described by a Gaussian at short times, with a variance of s that grows subdiffusively as t(alpha) with alpha approximate to 0.8. For times exceeding < T >, P(s,t) of the polymers that have not yet finished their translocation has a nontrivial stable shape.