On the concentration and the convergence rate with a moment condition in first passage percolation

Details On the concentration and the convergence rate with a moment condition in first passage percolation On the concentration and the convergence rate with a moment condition in first passage percolation

2008-08-22

arxiv.org/abs/0808.3021v1

Mathematics

Probability

27 pages, 3 figures

Scientific paper

We consider the first passage percolation model on the ${\bf Z}^d$ lattice. In this model, we assign independently to each edge $e$ a non-negative passage time $t(e)$ with a common distribution $F$. Let $a_{0,n}$ be the passage time from the origin to $(n,0,..., 0)$. Under the exponential tail assumption, Kesten (1993) and Talagrand (1995) investigated the concentration of $a_{0,n}$ from its mean using different methods. With this concentration and the exponential tail assumption, Alexander gave an estimate for the convergence rate for ${\bf E} a_{0,n}$. In this paper, focusing on a moment condition, we reinvestigate the concentration and the convergence rate for $a_{0,n}$ using a special martingale structure.

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