Numerical Study of Rotating Flocks in Active Chiral Quincke Roller Colloids

The collective dynamics of active matter systems holds great promise for a new generation of advanced tunable materials with high adaptability. Here we investigate active chiral fluids composed of Quincke rollers having predefined, but different handedness. These systems show the formation of synchronized states in a certain range of excitation parameters. Using a molecular dynamics model, which considers electrostatic and effective hydrodynamic interactions of the individual chiral rollers immersed into a liquid, we explore their collective dynamics and self-organized states, focusing on the dynamics and emergence of rotating flock states. We show that particles of different chiralities first phase separate and then form different dynamic states depending on particle density and external field.