The absolutely continuous spectrum of Jacobi matrices

Christian Remling

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arXiv · 0706.1101

The absolutely continuous spectrum of Jacobi matrices

Christian Remling

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Abstract

I explore some consequences of a groundbreaking result of Breimesser and Pearson on the absolutely continuous spectrum of one-dimensional Schr"odinger operators. These include an Oracle Theorem that predicts the potential and rather general results on the approach to certain limit potentials. In particular, we prove a Denisov-Rakhmanov type theorem for the general finite gap case. The main theme is the following: It is extremely difficult to produce absolutely continuous spectrum in one space dimension and thus its existence has strong implications.

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Christian Remling. 2010-08-11. The absolutely continuous spectrum of Jacobi matrices. https://arxiv.org/abs/0706.1101

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