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arXiv 1408.3208math.PR
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分层钉扎模型:$b=s$病例中的低紊乱相关性

Hierarchical pinning model: low disorder relevance in the $b=s$ case

Julien Sohier

摘要:

我们考虑了B.Derrida,V.Hakim和J.Vannimenus提出的一个经历定域/离域相变的层次钉扎模型.该模型取决于两个参数$b$和$s$。我们表明,在特定的情况下,其中$b=s$,无序是弱相关的,在这个意义上说,在任何给定的温度下,淬火和退火的临界点重合。这与$b \neq s$ .

英文摘要:

We consider a hierarchical pinning model introduced by B.Derrida, V.Hakim and J.Vannimenus which undergoes a localization/delocalization phase transition. This model depends on two parameters $b$ and $s$. We show that in the particular case where $b=s$, the disorder is weakly relevant, in the sense that at any given temperature, the quenched and the annealed critical points coincide. This is in contrast with the case where $b \neq s$.

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