On the delocalized phase of the random pinning model

Details On the delocalized phase of the random pinning model On the delocalized phase of the random pinning model

2010-10-22

arxiv.org/abs/1010.4671v1

Mathematics

Probability

4 pages

Scientific paper

We consider the model of a directed polymer pinned to a line of i.i.d. random charges, and focus on the interior of the delocalized phase. We first show that in this region, the partition function remains bounded. We then prove that for almost every environment of charges, the probability that the number of contact points in [0,n] exceeds c log(n) tends to 0 as n tends to infinity. Our proofs rely on recent results of Birkner, Greven, den Hollander (2010) and Cheliotis, den Hollander (2010).

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