Browsing by Author "Zhou, Qi"
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Item Absolutely continuous spectrum for CMV matrices with small quasi-periodic Verblunsky coefficients(American Mathematical Society, 2022) Li, Long; Damanik, David; Zhou, QiWe consider standard and extended CMV matrices with small quasi-periodic Verblunsky coefficients and show that on their essential spectrum, all spectral measures are purely absolutely continuous. This answers a question of Barry Simon from 2005.