Name: Aperiodic tilings, earthquakes and electrons
Start: 2024-05-14T19:30:00
End: 2024-05-14T21:00:00
Location: Le Tonneau de Diogène

Quasicrystals are mesmerizing patterns of points and polygons that are mathematically ordered but never repeat.
They entered the frontline of quantum physics when the atoms of certain materials were discovered to be arranged as quasicrystals, a noble prize discovery. In this talk, we will discuss how recently discovered (in 2023!) aperiodic tilings, the Hat tilings, behave when waves travel through them. We will show how these can reveal new microscopic quantum properties and help detect Earth-size seismic waves.

Seismic waves through the Hat quasicrystal

Aurelien Mordret (PostDoc, ISTerre)

In the first talk, we will explore the innovative application of aperiodic tilings, also known as quasicrystals, as a new seismic detector geometry, leveraging their unique non-repeating patterns to enhance sensitivity and accuracy in earthquake monitoring.
We will discuss how some members of the Hat family of tilings can be used to design seismic detection arrays and how they could beat standard, ordered arrays in accurately detecting seismic waves

Electronic waves through the Hat quasicrystal

Adolfo GRUSHIN (Research Scientist, Institut Neel, CNRS)

In the second talk, we will discuss a hypothetical material where the atoms are arranged at the vertices of the Hat tiling. We will show that the electrons around such an arrangement of atoms show remarkable new quantum properties, half-way between ordered crystals and known quasicrystals. We will discuss possible ways these hypothetical materials could be realized in the laboratory.

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