Time-averaged local volume fraction ϕ(r) of interacting and noninteracting particles in a system with spatially patterned one-particle swim speed v(r), where v = vi = v0(1 – i/16) in the ith well and v = v0 between the wells. The solid lines show our predictions with a prefactor determined by least-squares fits, where we neglected the three highest density (ϕ > 0.5) data points for the interacting particles. Inset: Spatially resolved plot of ϕ(r) for the interacting particles; note the logarithmic scale on the color bar.
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