Fig. 4: Kinetic phase diagram.
a Phase diagram in the plane of reduced activity f0 and packing fraction Φ with a color gradient denoting the mode particle speed (points). Background colors are used to distinguish between different phases: cooled (blue), mixed (pink), and heated (red) phases. The cooled phase occurs when most of the particles are frictional arrested and remain within the cluster, whereas in a heated phase, particles are highly mobile and are not significantly slowed down by the frictional forces. A state where cooled and heated phases coexist is referred to as a mixed phase. Details on the transition line between these states are discussed in the Methods. b–d Snapshots of cooled, mixed, and heated phases. The color gradient denotes the particle speed (red for high and blue for low speeds). The stars above each snapshot indicate the corresponding parameters f0, Φ in the phase diagram a. e–g Probability distribution of the velocity p(v) for the cooled (e), mixed (f) and heated (g) phases. For the mixed state, we separately highlight the distributions for particles inside (blue) and outside (red) of the cooled cluster. Particles within the cluster exhibit characteristics of the cooled phase, while those outside behave like particles in the heated phase. In all cases p(v) exhibits a single peak vm (dashed vertical line, mode speed), with the value of this peak depicted in the phase diagram a.
