Exploració per tema "Rotation number"
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Resonance tongues and spectral gaps in quasi-periodic schrödinger operators with one or more frequencies. A numerical exploration
(2010-07)
Report de recerca
Accés obertAbstract. In this paper we investigate numerically the spectrum of some representative examples of discrete one-dimensional Schr¨odinger operators with quasi-periodic potential in terms of a perturbative constant b and ... -
Resonance tongues in the quasi-periodic hill-Schrödinger equation with three frequencies
(2010-07)
Report de recerca
Accés obertIn this paper we investigate numerically the following Hill’s equation x00 + (a + bq(t))x = 0 where q(t) = cos t + cosp2t + cosp3t is a quasiperiodic forcing with three rationally independent frequencies. It appears,also, as ...