Fig. 1: Active granular matter in the Lab.
Top view of a layer of active Brownian vibrators. The packing fraction in this layer is ϕ = 0.822. In the upper left corner, one Brownian vibrator is shown. The total area of large and small particles has a fixed ratio of 1/1, and their diameters have a ratio of dl/ds = 1.4/1.
