Tilings, tiling spaces and topology

Details Tilings, tiling spaces and topology Tilings, tiling spaces and topology

2005-06-02

arxiv.org/abs/math/0506054v1

Mathematics

Dynamical Systems

8 pages, including 2 figures, talk given at ICQ9

Scientific paper

To understand an aperiodic tiling (or a quasicrystal modeled on an aperiodic tiling), we construct a space of similar tilings, on which the group of translations acts naturally. This space is then an (abstract) dynamical system. Dynamical properties of the space (such as mixing, or the spectrum of the translation operator) are closely related to bulk properties of the individual tilings (such as the diffraction pattern). The topology of the space of tilings, particularly the Cech cohomology, gives information on how the original tiling can be deformed. Tiling spaces can be constructed as inverse limits of branched manifolds.

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