Renormalisation of Pair Correlations and Their Fourier Transforms for Primitive Block Substitutions

Baake, Michael and Grimm, Uwe (2020). Renormalisation of Pair Correlations and Their Fourier Transforms for Primitive Block Substitutions. In: Akiyama, Shigeki and Arnoux, Pierre eds. Substitution and Tiling Dynamics: Introduction to Self-inducing Structures. Lecture Notes in Mathematics, 2273. Cham: Springer, pp. 359–395.

DOI: https://doi.org/10.1007/978-3-030-57666-0_7

Abstract

For point sets and tilings that can be constructed with the projection method, one has a good understanding of the correlation structure, and also of the corresponding spectra, both in the dynamical and in the diffraction sense. For systems defined by substitution or inflation rules, the situation is less favourable, in particular beyond the much-studied class of Pisot substitutions. In this contribution, the geometric inflation rule is employed to access the pair correlation measures of self-similar and self-affine inflation tilings and their Fourier transforms by means of exact renormalisation relations. In particular, we look into sufficient criteria for the absence of absolutely continuous spectral contributions, and illustrate this with examples from the class of block substitutions. We also discuss the Frank-Robinson tiling, as a planar example with infinite local complexity and singular continuous spectrum.

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