We prove normal typicality and dynamical typicality for a (centered) random block-band matrix model with block-dependent variances. A key feature of our model is that we achieve intermediate equilibration times, an aspect that has not been proven rigorously in any model before. Our proof builds on recently established concentration estimates for products of resolvents of Wigner type random matrices (Erdős and Riabov in Commun Math Phys 405(12): 282, 2024) and an intricate analysis of the deterministic approximation.
Normal typicality and dynamical typicality for a random block-band matrix model / L. Erdős, J. Henheik, C. Vogel. - In: LETTERS IN MATHEMATICAL PHYSICS. - ISSN 1573-0530. - 116:1(2026 Feb), pp. 5.1-5.32. [10.1007/s11005-025-02037-5]
Normal typicality and dynamical typicality for a random block-band matrix model
C. Vogel
Ultimo
2026
Abstract
We prove normal typicality and dynamical typicality for a (centered) random block-band matrix model with block-dependent variances. A key feature of our model is that we achieve intermediate equilibration times, an aspect that has not been proven rigorously in any model before. Our proof builds on recently established concentration estimates for products of resolvents of Wigner type random matrices (Erdős and Riabov in Commun Math Phys 405(12): 282, 2024) and an intricate analysis of the deterministic approximation.
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