Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical steady-states of active colloids interacting via chemical
  fields   We study the dynamical steady-states of a monolayer of chemically active
self-phoretic colloids as a function of packing fraction and self-propulsion
speed by means of Brownian dynamics simulations. We focus on the case that a
chemical field induces competing attractive positional and repulsive
orientational interactions. Analyzing the distribution of cluster size and
local density as well as the hexatic order parameter, we distinguish four
distinct dynamical states which include collapsed, active gas, dynamical
clustering, and motility-induced phase-separated states. The long-range
chemical field-induced interactions shift the onset of motility-induced phase
separation (MIPS) to very low packing fractions at intermediate self-propulsion
speeds. We also find that the fraction of particles in the largest clusters is
a suitable order parameter characterizing the dynamical phase transitions from
an active gas or dynamical clustering steady-state to a phase-separated state
upon increase of the packing fraction. The order parameter changes
discontinuously when going from an active gas to a MIPS-like state at
intermediate self-propulsion speeds, whereas it changes continuously at larger
activities where the system undergoes a transition from a dynamical clustering
state to MIPS-like state.

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The categories of this paper are: hep-ph
16
The categories of this paper are: stat
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph