Figure 1.

OU master curve (solid line) compared with the experimental MSD from different systems reported in the literature, normalized by us using the reported data on temperature and velocity or other quantities: (circles) steel sphere 1.19 mm from Fig. 2 in ref.¹⁸, (triangles) silica particle of 3 μm at 99.8 kPa from Fig. 4 in ref.¹⁴, (diamonds) silica particle of 3 μm at 2.75 kPa from Fig. 3 in ref.¹⁴, (squares) silica sphere of 2.5 μm from Fig. 2 in ref.¹⁵, and (stars) silica sphere 1 μm from Fig. 2 in ref.¹⁵. The long-time plateau exhibited in some MSD curves is due to either the system’s finite size or to the particle’s confinement by the external field.