Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kinetics of motility-induced phase separation and swim pressure   Active Brownian particles (ABPs) represent a minimal model of active matter
consisting of self-propelled spheres with purely repulsive interactions and
rotational noise. Here, we examine the pressure of ABPs in two dimensions in
both closed boxes and systems with periodic boundary conditions and show that
its nonmonotonic behavior with density is a robust feature, independent of
system size. We correlate the time evolution of the mean pressure towards its
steady state value with the kinetics of motility-induced phase separation. For
parameter values corresponding to phase separated steady states, we identify
two dynamical regimes. The pressure grows monotonically in time during the
initial regime of rapid cluster formation, overshooting its steady state value
and then quickly relaxing to it, and remains constant during the subsequent
slower period of cluster coalescence and coarsening. The overshoot is a
distinctive feature of active systems.

34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
16
The categories of this paper are: stat
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph