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arXiv 1012.4653math.PR
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具有重尾势的离散时间抛物型Anderson模型

The discrete-time parabolic Anderson model with heavy-tailed potential

Francesco Caravenna, Philippe Carmona, Nicolas Pétrélis

摘要:

我们考虑一个离散时间版本的抛物型安德森模型。这可以被描述为一个有向(1+d)维聚合物与一个随机势相互作用的模型,该随机势在确定性方向上是恒定的,且i.i.d.在d个正交方向上。在每个站点的潜力是一个积极的随机变量与多项式的尾巴在无穷大。我们表明,随着系统尺寸的发散,聚合物末端几乎肯定会定位在一个弹道生长的点上。我们给出了一个明确的特征的本地化点和典型的路径的模型。

英文摘要:

We consider a discrete-time version of the parabolic Anderson model. This may be described as a model for a directed (1+d)-dimensional polymer interacting with a random potential, which is constant in the deterministic direction and i.i.d. in the d orthogonal directions. The potential at each site is a positive random variable with a polynomial tail at infinity. We show that, as the size of the system diverges, the polymer extremity is localized almost surely at one single point which grows ballistically. We give an explicit characterization of the localization point and of the typical paths of the model.

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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