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Concentration under scaling limits for weakly pinned Gaussian random walks

机译:弱固定高斯随机游动的缩放限制下的浓度

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摘要

We study scaling limits for d-dimensional Gaussian random walks perturbed by an attractive force toward a certain subspace of R-d, especially under the critical situation that the rate functional of the corresponding large deviation principle admits two minimizers. We obtain different type of limits, in a positive recurrent regime, depending on the co-dimension of the subspace and the conditions imposed at the final time under the presence or absence of a wall. The motivation comes from the study of polymers or (1 + 1)-dimensional interfaces with delta-pinning.
机译:我们研究了d维高斯随​​机游动的标度极限,该游标受到吸引力向R-d的某个子空间扰动,特别是在相应大偏差原理的速率函数允许两个最小化的临界情况下。根据子空间的维数以及在存在或不存在墙的情况下最后一次施加的条件,我们在正的递归状态下获得不同类型的限制。动机来自对聚合物或具有三角钉扎的(1 + 1)维界面的研究。

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