Diffraction spectra of weighted Delone sets on beta-lattices with beta a quadratic unitary Pisot number

[Spectre de diffraction d’ensembles de Delaunay avec poids supportés par des beta-réseaux où beta est un nombre de Pisot unitaire]

Gazeau, Jean-Pierre ; Verger-Gaugry, Jean-Louis

Annales de l'Institut Fourier, Tome 56 (2006), p. 2437-2461 / Harvested from Numdam

Résumé

On caractérise au moyen de la théorie des distributions la transformée de Fourier d’un peigne de Dirac avec poids, plus particulièrement la partie purement ponctuelle qui correspond aux pics de Bragg dans le spectre de diffraction. La fonction intensité de ces derniers est donnée d’une manière explicite. On en déduit le spectre de diffraction d’ensembles de Delaunay avec poids supportés par les beta-réseaux dans le cas où le poids est factorisable et où beta est le nombre d’or.

Abstract

The Fourier transform of a weighted Dirac comb of beta-integers is characterized within the framework of the theory of Distributions, in particular its pure point part which corresponds to the Bragg part of the diffraction spectrum. The corresponding intensity function on this Bragg part is computed. We deduce the diffraction spectrum of weighted Delone sets on beta-lattices in the split case for the weight, when beta is the golden mean.

Détail

Publié le : 2006-01-01

MR 2290786 | Zbl 1119.52015 | 2 citations dans Numdam

DOI : https://doi.org/10.5802/aif.2245
Classification:  52C23,  78A45,  42A99
Mots clés: Ensembles de Delaunay, ensembles de Meyer, beta-entiers, beta-réseaux, nombres de Pisot-Vijayaraghavan, diffraction mathématique

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