  Transport inhibition via Anderson localization is ubiquitous in disordered
periodic lattices. However, in crystals displaying only flat bands disorder can
lift macroscopic band flattening, removing geometric localization and enabling
transport in certain conditions. Such a striking phenomenon, dubbed inverse
Anderson transition and predicted for three-dimensional flat band systems, has
thus far not been directly observed. Here we suggest a simple quasi
one-dimensional photonic flat band system, namely an Aharonov-Bohm photonic
cage, in which correlated binary disorder induces an inverse Anderson
transition and ballistic transport.
