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math.SP2025
A note on the RAGE Theorem and phase-averaged dispersion for the Fibonacci Hamiltonian
Gaétan Leclerc
We find a weaker condition on spectral measures, "eventual absolute continuity", that ensure quantum delocalization as in the RAGE Theorem in the case of purely absolutely continuo…
math.DS2025
Fourier decay of equilibrium states and the Fibonacci Hamiltonian
Gaétan Leclerc
We show power Fourier decay for equilibrium states of nonlinear, area preserving, smooth Axiom-A diffeomorphisms on surfaces. This implies positivity of the lower Fourier dimension…
math.DS2025
Fourier decay in parabolic systems with overlaps
Gaétan Leclerc, Sampo Paukkonen, Tuomas Sahlsten
We establish power Fourier decay for equilibrium states of parabolic iterated function systems with overlaps satisfying a multiscale nonlinearity condition. This class in…