%0 Journal Article
%T Diffraction from visible lattice points and k-th power free integers
%A Michael Baake
%A Robert V. Moody
%A Peter A. B. Pleasants
%J Physics
%D 1999
%I arXiv
%X We prove that the set of visible points of any lattice of dimension at least 2 has pure point diffraction spectrum, and we determine the diffraction spectrum explicitly. This settles previous speculation on the exact nature of the diffraction in this situation, see math-ph/9903046 and references therein. Using similar methods we show the same result for the 1-dimensional set of k-th power free integers with k at least 2. Of special interest is the fact that neither of these sets is a Delone set --- each has holes of unbounded inradius. We provide a careful formulation of the mathematical ideas underlying the study of diffraction from infinite point sets.
%U http://arxiv.org/abs/math/9906132v2