Work

Lyapounov exponent of the one dimensional Anderson model : weak disorder expansions

Year: 1984

Type: article

Abstract: We describe a method which gives the weak disorder expansion (λ → 0) of the Lyapounov exponent γ(E) of a discretized one-dimensional Schrödinger equation ψn+1 + ψ n-1 + λVnψn = Eψn with a random potential Vn. Near the band edge of the pure system (E → 2), the weak disorder expansion of y(E) is non analytic and we show that γ(E) ∼ λ2/3 when λ → 0. At the band centre (E → 0), we recover the anomaly which has already been explained by Kappus and Wegner. We find another anomaly at the energy E = 2 cos (π/3) and we believe that similar anomalies should occur at all energies E = 2 cos (απ) with α rational.

Source: Journal de physique

DOI: 10.1051/jphys:019840045080128300

Authors: B. Derrida, E. Gardner

Institutions: Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay - Etablissement de Saclay, CEA Paris-Saclay

Language: English

Topic: Spectral Theory in Mathematical Physics

Subfield: Mathematical Physics

Field: Mathematics

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2108156913

FWCI: 9.194

Cites: 6

Cited by: 283

Related to: 10