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arxiv: math/0507054 · v1 · pith:S47BEUYCnew · submitted 2005-07-04 · 🧮 math.PR

Random walk attracted by percolation clusters

classification 🧮 math.PR
keywords betarandomwalkattractedclustersfunctionpercolationtransition
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Starting with a percolation model in $\Z^d$ in the subcritical regime, we consider a random walk described as follows: the probability of transition from $x$ to $y$ is proportional to some function $f$ of the size of the cluster of $y$. This function is supposed to be increasing, so that the random walk is attracted by bigger clusters. For $f(t)=e^{\beta t}$ we prove that there is a phase transition in $\beta$, i.e., the random walk is subdiffusive for large $\beta$ and is diffusive for small $\beta$.

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