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arXiv 2008.13167math-phmath.MP
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定宽随机带矩阵的态密度和局域本征值统计

The density of states and local eigenvalue statistics for random band matrices of fixed width

Benjamin Brodie, Peter D. Hislop

摘要:

我们证明了局部特征值统计$d=1$随机带矩阵具有固定的带宽,例如,高斯条目,给出了一个泊松点过程,我们确定的强度的过程。证明依赖于扩展的本地化范围的Schenker \cite{schenker}和韦格纳和Minami估计。这两个估计证明使用平均对角无序。新的分量证明了状态密度函数的一致收敛性和光滑性。极限函数,已知是一个带宽依赖的误差\cite{bmp,dps,dl,mpk}的周期律,被确定为强度的极限泊松点过程。这些态密度结果的证明依赖于一个新的结果,该结果简化并扩展了Dolai、Krishna和Mallick \cite{dkm}使用的一些思想。这些作者证明了随机薛定谔算子(晶格和连续)在局域化制度的状态密度的规律性。本文给出的证明适用于\cite{dkm}中处理的一类无限图上的随机薛定谔算子,并将\cite{dkm}的结果推广到具有无界支撑的概率测度上.该方法也适用于$d=2,3$的固定带宽RBM,只要已知某些定位边界。

英文摘要:

We prove that the local eigenvalue statistics for $d=1$ random band matrices with fixed bandwidth and, for example, Gaussian entries, is given by a Poisson point process and we identify the intensity of the process. The proof relies on an extension of the localization bounds of Schenker \cite{schenker} and the Wegner and Minami estimates. These two estimates are proved using averaging over the diagonal disorder. The new component is a proof of the uniform convergence and the smoothness of the density of states function. The limit function, known to be the semicircle law with a band-width dependent error \cite{bmp,dps,dl,mpk}, is identified as the intensity of the limiting Poisson point process. The proof of these results for the density of states relies on a new result that simplifies and extends some of the ideas used by Dolai, Krishna, and Mallick \cite{dkm}. These authors proved regularity properties of the density of states for random Schrödinger operators (lattice and continuum) in the localization regime. The proof presented here applies to the random Schrödinger operators on a class of infinite graphs treated by in \cite{dkm} and extends the results of \cite{dkm} to probability measures with unbounded support. The method also applies to fixed bandwidth RBM for $d=2,3$ provided certain localization bounds are known.

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