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Pré-Publication, Document De Travail Année : 2009

Dynamical Bounds for Sturmian Schrodinger Operators

Résumé

The Fibonacci Hamiltonian, that is a Schrodinger operator associated to a quasiperiodical sturmian potential with respect to the golden mean has been investigated intensively in recent years. Damanik and Tcheremchantsev developed a method and find a non trivial dynamical upper bound for this model. In this paper, we use this method to generalize to a large family of Sturmian operators dynamical upper bounds and show at sufficently large coupling anomalous transport for operators associated to irrational number with a generic diophantine condition. As a counter example, we exhibit a pathological irrational number which do not verify this condition and show its associated dynamic exponent only has ballistic bound. Moreover, we establish a global lower bound for the lower box counting dimension of the spectrum that is used to obtain a dynamical lower bound for bounded density irrational numbers.

Dates et versions

hal-00463888 , version 1 (15-03-2010)

Identifiants

Citer

Laurent Marin. Dynamical Bounds for Sturmian Schrodinger Operators. 2009. ⟨hal-00463888⟩
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