Anderson localization for the multi-frequency quasi-periodic CMV matrices and quantum walks
Abstract: In this paper, we establish Anderson localization for the CMV matrices with multi-frequency analytic quasi-periodic Verblunsky coefficients in the regime of the positive Lyapunov exponent. As an application, we further derive the Anderson localization for the multi-frequency analytic quasi-periodic quantum walks. We extend the results of Wang and Damanik (J. Funct. Anal. 276 (2019)) for one-frequency quasi-periodic CMV matrices to multi-frequency case.
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