Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Single particle motion and collective dynamics in Janus motor systems   The single-particle and collective dynamics of systems comprising Janus
motors, solvent and reactive solute species maintained in nonequilibrium states
are investigated. Reversible catalytic reactions with the solute species take
place on the catalytic faces of the motors, and the nonequilibrium states are
established by imposing either constant-concentration reservoirs that feed and
remove reactive species, or through out-of-equilibrium fluid phase reactions.
We consider general intermolecular interactions between the Janus motor
hemispheres and the reactive species. For single motors, we show that the
reaction rate depends nonlinearly on an applied external force when the system
is displaced far from equilibrium. We also show that a finite-time fluctuation
formula derived for fixed catalytic particles describes the nonequilibrium
reactive fluctuations of moving Janus motors. Simulation of the collective
dynamics of small ensembles of Janus motors with reversible kinetics under
nonequilibrium conditions are carried out and the spatial and orientational
correlations of dynamic cluster states are discussed. The conditions leading to
the instability of the homogeneous motor distribution and the onset of
nonequilibrium dynamical clustering are described.

24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th