arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1209.4863math-phmath.MP
收藏

Schr\”odinger算子谱投影的唯一延拓原理和非遍历随机Schr\”odinger算子的最优Wegner估计

Unique continuation principle for spectral projections of Schr\" odinger operators and optimal Wegner estimates for non-ergodic random Schr\" odinger operators

Abel Klein

备注：
Revised
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

证明了Schr odinger算子谱投影的唯一延拓原理.考虑$\mathrm{L}^2(\mathbb{R}^d)$上的Schr”odinger算子$H= -Δ+ V$，用$H_Λ$表示它对具有Dirichlet或周期边界条件的有限盒$Λ$的限制.我们证明了唯一的连续估计类型$χ_I (H_Λ) W χ_I (H_Λ) \ge κ\, χ_I (H_Λ) $与$κ>0$适当的潜力$W\ge 0$和间隔$I$。作为应用，我们得到了一类具有合金{-型随机势的非遍历随机Schr”odinger算子（“弯曲”Anderson Hamilton算子）在所有能量下的最优Wegner估计.我们还证明了最佳的韦格纳估计在底部的频谱与预期的依赖性的障碍（韦格纳估计改善的障碍增加），一个新的结果，即使是通常的（遍历）安德森哈密顿。这些估计被应用于证明本地化在高无序安德森哈密顿在一个固定的时间间隔在底部的频谱。

英文摘要：

We prove a unique continuation principle for spectral projections of Schr\" odinger operators. We consider a Schr\" odinger operator $H= -Δ+ V$ on $\mathrm{L}^2(\mathbb{R}^d)$, and let $H_Λ$ denote its restriction to a finite box $Λ$ with either Dirichlet or periodic boundary condition. We prove unique continuation estimates of the type $χ_I (H_Λ) W χ_I (H_Λ) \ge κ\, χ_I (H_Λ) $ with $κ>0$ for appropriate potentials $W\ge 0$ and intervals $I$. As an application, we obtain optimal Wegner estimates at all energies for a class of non-ergodic random Schr\" odinger operators with alloy{-type random potentials (`crooked' Anderson Hamiltonians). We also prove optimal Wegner estimates at the bottom of the spectrum with the expected dependence on the disorder (the Wegner estimate improves as the disorder increases), a new result even for the usual (ergodic) Anderson Hamiltonian. These estimates are applied to prove localization at high disorder for Anderson Hamiltonians in a fixed interval at the bottom of the spectrum.

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。

↑