Dynamical Bounds for Sturmian Schrödinger Operators

Abstract

The Fibonacci Hamiltonian, that is a Schrödinger 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.

References in corpus (1)

• The Fractal Dimension of the Spectrum of the Fibonacci Hamiltonian

Cited by in corpus (4)

• Schrödinger Operators with Dynamically Defined Potentials: A Survey
• The Fibonacci Hamiltonian
• Absolutely Continuous Convolutions of Singular Measures and an Application to the Square Fibonacci Hamiltonian
• On and Off-diagonal Sturmian operator: dynamic and spectral dimension