English
Related papers

Related papers: Wegner Estimate for Indefinite Anderson Potentials…

200 papers

I consider random Schr\"odinger operators with exponentially decaying single site potential, which is allowed to change sign. For this model, I prove Anderson localization both in the sense of exponentially decaying eigenfunctions and…

Spectral Theory · Mathematics 2010-06-29 Helge Krueger

We prove a Wegner estimate for discrete Schr\"odinger operators with a potential given by a Gaussian random process. The only assumption is that the covariance function decays exponentially, no monotonicity assumption is required. This…

Mathematical Physics · Physics 2020-11-17 Martin Tautenhahn

We prove some abstract Wegner bounds for random self-adjoint operators. Applications include elementary proofs of Wegner estimates for discrete and continuous Anderson Hamiltonians with possibly sparse potentials, as well as Wegner bounds…

Mathematical Physics · Physics 2014-02-14 Mostafa Sabri

We consider non-ergodic magnetic random Sch\"odinger operators with a bounded magnetic vector potential. We prove an optimal Wegner estimate valid at all energies. The proof is an adaptation of the arguments from [Kle13], combined with a…

Mathematical Physics · Physics 2017-12-11 Matthias Täufer , Martin Tautenhahn

We discuss recent results on spectral properties of discrete alloy-type random Schr\"odinger operators. They concern Wegner estimates and bounds on the fractional moments of the Green's function.

Spectral Theory · Mathematics 2017-08-23 Martin Tautenhahn , Ivan Veselić

We introduce and prove local Wegner estimates for continuous generalized Anderson Hamiltonians, where the single-site random variables are independent but not necessarily identically distributed. In particular, we get Wegner estimates with…

Mathematical Physics · Physics 2013-09-18 Jean-Michel Combes , François Germinet , Abel Klein

We extend methods of Ding and Smart from their breakthrough paper in 2020 which showed Anderson localization for certain random Schr\"odinger operators on $\ell^2(\mathbb{Z}^2)$ via a quantitative unique continuation principle and Wegner…

Mathematical Physics · Physics 2026-03-11 Omar Hurtado

We prove some local estimates on the trace of spectral projectors for random Schr\"odinger operators restricted to cubes $\Lambda \subset R^d$. We also present a new proof of the spectral averaging result based on analytic perturbation…

Mathematical Physics · Physics 2020-10-07 J. M. Combes , P. D. Hislop

The object of the present study is the integrated density of states of a quantum particle in multi-dimensional Euclidean space which is characterized by a Schr{\"o}dinger operator with magnetic field and a random potential which may be…

Mathematical Physics · Physics 2009-11-07 Thomas Hupfer , Hajo Leschke , Peter Müller , Simone Warzel

We present new scale-free quantitative unique continuation principles for Schr\"odinger operators. They apply to linear combinations of eigenfunctions corresponding to eigenvalues below a prescribed energy, and can be formulated as an…

Analysis of PDEs · Mathematics 2016-01-07 Ivica Nakić , Matthias Täufer , Martin Tautenhahn , Ivan Veselić

We consider one-dimensional random Schr\"odinger operators with a background potential, arising in the inverse problem of scattering. We study the influence of the background potential on the essential spectrum of the random Schr\"odinger…

Mathematical Physics · Physics 2017-12-22 Hayk Asatryan , Werner Kirsch

We study localisation effects of strong disorder on the spectral and dynamical properties of (matrix and scalar) Schroedinger operators with non-monotone random potentials, on the d-dimensional lattice. Our results include dynamical…

Mathematical Physics · Physics 2016-11-18 Alexander Elgart , Mira Shamis , Sasha Sodin

We prove a strictly positive, locally uniform lower bound on the density of states (DOS) of continuum random Schr\"odinger operators on the entire spectrum, i.e. we show that the DOS does not have a zero within the spectrum. This follows…

Mathematical Physics · Physics 2020-01-01 Martin Gebert

We consider Schr\"odinger operators in $\ell^2(\mathbb{Z})$ whose potentials are given by independent (not necessarily identically distributed) random variables. We ask whether it is true that almost surely its spectrum contains an…

Spectral Theory · Mathematics 2021-12-07 David Damanik , Anton Gorodetski

We consider a discrete Schroedinger operator whose potential is the sum of a Wigner-von Neumann term and a summable term. The essential spectrum of this operator equals to the interval [-2,2]. Inside this interval, there are two critical…

Spectral Theory · Mathematics 2012-03-12 Sergey Simonov

In this note, a Wegner estimate for random divergence-type operators that are monotone in the randomness is proven. The proof is based on a recently shown unique continuation estimate for the gradient and the ensuing eigenvalue liftings.…

Mathematical Physics · Physics 2021-06-22 Alexander Dicke

We prove Anderson localization at the internal band-edges for periodic magnetic Schr{\"o}dinger operators perturbed by random vector potentials of Anderson-type. This is achieved by combining new results on the Lifshitz tails behavior of…

Mathematical Physics · Physics 2007-08-15 F. Ghribi , P. D. Hislop , F. Klopp

We survey the localization theory of random Schr\"odinger operators with singular single-site distributions, focusing on two regimes: (i) H\"older-continuous laws, where quantitative Wegner estimates enable the classical multiscale analysis…

Spectral Theory · Mathematics 2025-11-10 Travis Kwan

We consider discrete random Schr\"odinger operators on $\ell^2 (\mathbb{Z}^d)$ with a potential of discrete alloy-type structure. That is, the potential at lattice site $x \in \mathbb{Z}^d$ is given by a linear combination of independent…

Mathematical Physics · Physics 2016-01-08 Martin Tautenhahn , Ivan Veselić

Electronic properties of amorphous or non-crystalline disordered solids are often modelled by one-particle Schroedinger operators with random potentials which are ergodic with respect to the full group of Euclidean translations. We give a…

Disordered Systems and Neural Networks · Physics 2007-05-23 Hajo Leschke , Peter Müller , Simone Warzel