One of the research lines of QAOS group (theory) is focused on the control of light propagation in systems of coupled optical waveguides. They explore the capability of light with OAM to induce phases in some coupling amplitudes, which are equivalent to a net π flux through the plaquettes and, give rise to a topologically non-trivial band structure, topologically protected states and Aharanov-Bohm caging. They also employ discrete Supersymmetry to design a partner system with a modified geometry but sharing the same spectrum of eigenvalues except one, that it is eliminated. This technique allows to perform high efficient topological pumping and topological state engineering.  Verónica Ahufinger is the representative of this node in the FASLIGHT network.