Figure 7.
Validation of the new tracking algorithm. (a) Number of mistakes made by the algorithm in probe trajectory reconstruction as the number of sensors is increased: the parabolic shape reflects the mean field nature of the synthetic model as the number of contact among particles scales as n(n – 1)/2 ∼ n2, but the percentage of errors is kept minimal. (b) Number of mistakes made by the algorithm in probe trajectory reconstruction vs number of detected tracks (but correct and wrong): the linear growth with the density emerges as expected. (c,d) Examples of simulations of self-propelled trajectories with N = 20 and N = 160 particles, respectively.