Thouless pumping of light with a twist – Nature Physics News and Views
ISC researchers L. Pilozzi and V. Brosco write on a recent experiment  with photonic waveguides which demonstrates the connection between non-Abelian holonomies and adiabatic particle transport, paving the way to the geometric and topological control of light trajectories.
The experiment by Sun and colleagues represents one of the few observations so far of the non-Abelian Wilczek–Zee holonomy. But by employing Thouless pumping as a tool for probing non-Abelian topological physics, it also paves the way for the geometric control of photon states and light trajectories in real space — a fundamental step in the direction of photonic information processing .
 YK. Sun, XL. Zhang, F. Yu, et al. Non-Abelian Thouless pumping in photonic waveguides. Nat. Phys. (2022).
 V. Brosco, L. Pilozzi, R. Fazio, and C. Conti, Phys. Rev. A 103, 063518 (2021).