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arXiv math-ph/0412079math-phmath.MP
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随机表面势的安德森局域化和Lifshits尾

Anderson Localization and Lifshits Tails for Random Surface Potentials

Werner Kirsch, Simone Warzel

摘要:

我们考虑$L^2(R^d)$上的薛定谔算子,其随机势集中在表面$R^{d_1}\times\{0\}\subset R^d $附近。我们证明了此类算子的积分态密度在谱底附近呈现Lifshits尾。从这个和多尺度分析Boutet de Monvel和Stollmann [Arch.Math.80(2003)87],我们推断安德森局域化(纯点谱和动力学局域化)的低能量。我们的Lifshits尾的证明依赖于部分周期势的薛定谔算子的谱性质。特别是,我们表明,这种运营商的最低能量带是抛物线。

英文摘要:

We consider Schrödinger operators on $L^2(R^d)$ with a random potential concentrated near the surface $R^{d_1}\times\{0\}\subset R^d $. We prove that the integrated density of states of such operators exhibits Lifshits tails near the bottom of the spectrum. From this and the multiscale analysis by Boutet de Monvel and Stollmann [Arch. Math. 80 (2003) 87] we infer Anderson localization (pure point spectrum and dynamical localization) for low energies. Our proof of Lifshits tail relies on spectral properties of Schrödinger operators with partially periodic potentials. In particular, we show that the lowest energy band of such operators is parabolic.

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