SIAM Journal on Mathematical Analysis


Eigenvalue Fluctuations for Lattice Anderson Hamiltonians

Related Databases

Web of Science

You must be logged in with an active subscription to view this.

Article Data

History

Submitted: 20 June 2014
Accepted: 01 June 2016
Published online: 18 August 2016

Publication Data

ISSN (print): 0036-1410
ISSN (online): 1095-7154
CODEN: sjmaah

We study the statistics of Dirichlet eigenvalues of the random Schrödinger operator $-\epsilon^{-2}\Delta^{(\text{\rm d}\mkern0.5mu)}+\xi^{(\epsilon)}(x)$, with $\Delta^{(\text{\rm d}\mkern0.5mu)}$ the discrete Laplacian on ${\Bbb Z}^d$ and $\xi^{(\epsilon)}(x)$ uniformly bounded independent random variables, on sets of the form $D_\epsilon:=\{x\in{\Bbb Z}^d\colon x\epsilon\in D\}$ for $D\subset{\Bbb R}^d$ bounded, open, and with a smooth boundary. If ${\Bbb E}\xi^{(\epsilon)}(x)=U(x\epsilon)$ holds for some bounded and continuous $U\colon D\to{\Bbb R}$, we show that, as $\epsilon\downarrow0$, the $k$th eigenvalue converges to the $k$th Dirichlet eigenvalue of the homogenized operator $-\Delta+U(x)$, where $\Delta$ is the continuum Dirichlet Laplacian on $D$. Assuming further that $\text{\rm Var}(\xi^{(\epsilon)}(x))=V(x\epsilon)$ for some positive and continuous $V\colon D\to{\Bbb R}$, we establish a multivariate central limit theorem for simple eigenvalues centered by their expectation. The limiting covariance for a given pair of simple eigenvalues is expressed as an integral of $V$ against the product of squares of the corresponding eigenfunctions of $-\Delta+U(x)$.

© 2016, Society for Industrial and Applied Mathematics