Absence of diffusion in certain non-random magnets

[EQI] Eddleman Quantum Institute Seminar Series

Abstract: Thanks to their ubiquity and relative simplicity, magnets have played a central role in our understanding of the collective behaviour of matter. This talk presents very simple magnetic models which host highly unusal dynamical phenomena thanks to an emergent gauge field: one has fractionalised quasiparticles that move on a purely dynamical fractal invisible to thermodynamics; in the other, their motion is described by a fractional diffusion equation. While the former is based on an existing magnetic material called spin ice, the latter should be amenable to studies on synthetic many-body platforms.

Science 378, 1218 (2022)+unpublished