All couplings localization for quasiperiodic operators with Lipschitz monotone potentials

preprint2015arXivOpen access

Abstract

We establish Anderson localization for quasiperiodic operator families of the form (H(x)ψ)(m)=ψ(m+1)+ψ(m−1)+λv(x+mα)ψ(m) (H(x)ψ)(m)=ψ(m+1)+ψ(m-1)+λv(x+mα)ψ(m) for all λ>0λ>0 and all Diophantine αα, provided that vv is a 11-periodic function satisfying a Lipschitz monotonicity condition on [0,1)[0,1). The localization is uniform on any energy interval on which Lyapunov exponent is bounded from below.

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