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A note on random walk in random scenery

Amine Asselah, Fabienne Castell

math.PRarXiv:math/0501068

Abstract

We consider a d-dimensional random walk in random scenery X(n), where the scenery consists of i.i.d. with exponential moments but a tail decay of the form exp(-c ta) with a<d/2. We study the probability, when averaged over both randomness, that X(n)>ny. We show that this probability is of order exp(-(ny)b) with b=a/(a+1).

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