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arXiv 1107.2800math-phmath.MPmath.SP
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具有随机合金型势的离散Schr dinger算子

Discrete Schrödinger operators with random alloy-type potential

Alexander Elgart, Helge Krüger, Martin Tautenhahn, Ivan Veselić

摘要:

本文分别基于多尺度分析和分数阶矩方法,对离散合金模型局部化问题的最新研究成果进行了综述。离散合金型模型是$\ell^2 (\ZZ^d)$上的薛定谔算子族$H_ω= - Δ+ V_ω$,其中$Δ$是离散拉普拉斯算子,$V_ω$是与函数$V_ω(x) = \sum_{k \in \ZZ^d} ω_k u(x-k)$的乘积。此处$ω_k$、$k \in \ZZ^d$为i.i.d.。随机变量,而$u \in \ell^1 (\ZZ^d ; \RR)$是所谓的单点势。由于$u$可以改变符号,所以$H_ω$的某些性质以非单调的方式取决于随机参数$ω_k$。这需要在本地化证明的某些阶段采用新方法。

英文摘要:

We review recent results on localization for discrete alloy-type models based on the multiscale analysis and the fractional moment method, respectively. The discrete alloy-type model is a family of Schrödinger operators $H_ω= - Δ+ V_ω$ on $\ell^2 (\ZZ^d)$ where $Δ$ is the discrete Laplacian and $V_ω$ the multiplication by the function $V_ω(x) = \sum_{k \in \ZZ^d} ω_k u(x-k)$. Here $ω_k$, $k \in \ZZ^d$, are i.i.d. random variables and $u \in \ell^1 (\ZZ^d ; \RR)$ is a so-called single-site potential. Since $u$ may change sign, certain properties of $H_ω$ depend in a non-monotone way on the random parameters $ω_k$. This requires new methods at certain stages of the localization proof.

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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