  A model for autonomous feedback control of particle transport through a large
number of channels is introduced. Interactions among the particles can lead to
a strong suppression of fluctuations in the particle number statistics. Within
a mean-field type limit, the collective control mechanism becomes equivalent to
a synchronization with an external clock. The diffusive spreading of the
feedback signal across the channels shows scaling, can be quantified via the
flow of information, and shows up, e.g., in the spectral function of the
particle noise.
