Fig. 5: Controlling the size of an acoustically levitated granular raft.
From: Structural reconfiguration of interacting multi-particle systems through parametric pumping
a A levitated raft being pumped to undergo shape oscillations to shed particles, before being quenched and stabilized with fewer particles. The yellow dashed circle has the same size in each image and serves as a visual guide. b Evolution under repeated pump-quench cycling of the number of particles in a raft for different pump frequencies. Images to the right of the plot show the initial and final raft configuration, demonstrating the ability to control the raft size.
