  In both experiments and simulations the most commonly studied kind of
parameter polydispersity is that of varying particles size. This paper
investigates by simulations the effects of introducing polydispersity in other
parameters for two-dimensional Active Brownian Particles with Yukawa pair
interactions. Polydispersity is studied separately in the translational and
rotational diffusion coefficients, as well as in the swim velocity $v_0$.
Uniform and binary parameter distributions are considered in both the
homogeneous and the motility-induced phase-separation (MIPS) phases. We find
only minute changes in structure and dynamics upon the introduction of
parameter polydispersity, even for situations involving 50% polydispersity. The
reason for this is not clear. An exception is the case of $v_0$ polydispersity
for which the average radial distribution function with changing polydispersity
shows significant variations in the MIPS phase. Even in this case, however, the
dynamics is only modestly affected. As a possible application of our findings,
we suggest that a temporary introduction of polydispersity into a
single-component active-matter model characterized by a very long equilibration
time, i.e., a glass-forming active system, may be used to equilibrate the
system efficiently by particle swaps.
