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Limit-periodic Schrödinger operators with Lipschitz continuous IDS
(American Mathematical Society, 2019)
We show that there exist limit-periodic Schrödinger operators such that the associated integrated density of states is Lipschitz continuous. These operators arise in the inverse spectral theoretic KAM approach of Pöschel.
Multidimensional Almost-Periodic Schrödinger Operators with Cantor Spectrum
We construct multidimensional almost-periodic Schrödinger operators whose spectrum has zero lower box-counting dimension. In particular, the spectrum in these cases is a generalized Cantor set of zero Lebesgue measure.