English

Singular continuous spectrum for singular potential

Spectral Theory 2017-02-01 v1 Mathematical Physics math.MP

Abstract

We prove that Schr\"odinger operators with meromorphic potentials (Hα,θu)n=un+1+un1+g(θ+nα)f(θ+nα)un(H_{\alpha,\theta}u)_n=u_{n+1}+u_{n-1}+ \frac{g(\theta+n\alpha)}{f(\theta+n\alpha)} u_n have purely singular continuous spectrum on the set {E:L(E)<δ(α,θ)}\{E: L(E)<\delta{(\alpha,\theta)}\}, where δ\delta is an explicit function, and LL is the Lyapunov exponent. This extends results of Jitomirskaya and Liu for the Maryland model and of Avila, You and Zhou for the almost Mathieu operator, to the general family of meromorphic potentials.

Keywords

Cite

@article{arxiv.1604.04907,
  title  = {Singular continuous spectrum for singular potential},
  author = {Svetlana Jitomirskaya and Fan Yang},
  journal= {arXiv preprint arXiv:1604.04907},
  year   = {2017}
}
R2 v1 2026-06-22T13:34:15.099Z