Controlled Dynamics of Interfaces in a Vibrated Granular Layer
Controlled Dynamics of Interfaces in a Vibrated Granular Layer
We present an experimental study of a topological excitation, interface, in a vertically vibrated layer of granular material. We show that these interfaces, which separate regions of granular material oscillating with opposite phases, can be shifted and controlled by a very small amount of additional subharmonic driving mixed with the …