:bdg-link-primary:`Google Scholar <https://scholar.google.ch/citations?user=e5yVf8AAAAAJ&hl=en>`
:bdg-link-primary:`ORCiD <https://orcid.org/0000-0002-1694-3375>`
:bdg-link-primary:`GitHub <https://github.com/tdegeus>`

Excitations glasses
===================

In amorphous materials, groups of particles can rearrange locally into a new stable configuration.
Such elementary excitations are key as they determine the response to external stresses :footcite:`Ji2019`, as well as to thermal and quantum fluctuations :footcite:`Ji2020`.
Yet, understanding what controls their geometry remains a challenge.
We build a scaling description of the geometry and energy of low-energy excitations in terms of the distance to an instability, as predicted for instance at the dynamical transition in mean field approaches of supercooled liquids :footcite:`Ji2022`.
We successfully test our predictions in ultrastable computer glasses, with a gapped and ungapped (regular) spectrum.
Our approach explains why excitations become less extended, with a higher energy and displacement scale upon cooling.

**Selected publications**

.. footbibliography::