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arXiv math-ph/0211057math-phmath.MPmath.SP
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离散一维随机字模型的局部化

Localization for Discrete One Dimensional Random Word Models

David Damanik, Robert Sims, Günter Stolz

摘要:

我们考虑$\ell^2(\Z)$中的薛定谔算子,它的势是根据$\mathcal{W}$上的概率测度$ν$从一个基础集合$\mathcal{W}$中随机连接单词得到的。我们的假设允许我们考虑具有局部相关性的模型,例如随机二聚体模型,或者更一般地,随机聚合物模型。我们证明了光谱本地化,远离一组有限的特殊能量,动力学本地化等模型。这些结果是通过采用散射理论的方法与Furstenberg的定理,以验证必要的输入进行多尺度分析。

英文摘要:

We consider Schrödinger operators in $\ell^2(\Z)$ whose potentials are obtained by randomly concatenating words from an underlying set $\mathcal{W}$ according to some probability measure $ν$ on $\mathcal{W}$. Our assumptions allow us to consider models with local correlations, such as the random dimer model or, more generally, random polymer models. We prove spectral localization and, away from a finite set of exceptional energies, dynamical localization for such models. These results are obtained by employing scattering theoretic methods together with Furstenberg's theorem to verify the necessary input to perform a multiscale analysis.

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