Hierarchical pinning model with site disorder: Disorder is marginally relevant

Hubert Lacoin

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arXiv · 0807.4864

Hierarchical pinning model with site disorder: Disorder is marginally relevant

Hubert Lacoin

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Abstract

We study a hierarchical disordered pinning model with site disorder for which, like in the bond disordered case [6, 9], there exists a value of a parameter b (enters in the definition of the hierarchical lattice) that separates an irrelevant disorder regime and a relevant disorder regime. We show that for such a value of b the critical point of the disordered system is different from the critical point of the annealed version of the model. The proof goes beyond the technique used in [9] and it takes explicitly advantage of the inhomogeneous character of the Green function of the model.

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Hubert Lacoin. 2009-05-14. Hierarchical pinning model with site disorder: Disorder is marginally relevant. https://arxiv.org/abs/0807.4864

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