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arXiv 0903.3704math.PR
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有限程关联随机钉扎模型的淬火和退火临界曲线

On quenched and annealed critical curves of random pinning model with finite range correlations

Julien Poisat

摘要:

本文主要研究了钉扎在无序关联界面上的定向聚合物。我们假设的无序序列是一个q阶移动平均,并表明退火模型的临界曲线可以表示在Perron-Frobenius特征值的显式传输矩阵,这概括了退火边界的临界曲线i.i.d. disorder.我们提供明确的退火临界曲线值为$q=1$,2和弱无序渐近在一般情况下。根据更新理论的钉扎方法,退火模型的研究中出现的过程是特殊的马尔可夫更新过程。我们考虑这个过程的两个副本的交集,通过二阶矩的方法证明了无序无关的结果(即淬火和退火临界曲线以及指数重合)。

英文摘要:

This paper focuses on directed polymers pinned at a disordered and correlated interface. We assume that the disorder sequence is a q-order moving average and show that the critical curve of the annealed model can be expressed in terms of the Perron-Frobenius eigenvalue of an explicit transfer matrix, which generalizes the annealed bound of the critical curve for i.i.d. disorder. We provide explicit values of the annealed critical curve for $q=1$, 2 and a weak disorder asymptotic in the general case. Following the renewal theory approach of pinning, the processes arising in the study of the annealed model are particular Markov renewal processes. We consider the intersection of two replicas of this process to prove a result of disorder irrelevance (i.e. quenched and annealed critical curves as well as exponents coincide) via the method of second moment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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