Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-Equilibrium Interaction Between Catalytic Colloids: Boundary
  Conditions and Penetration Depth   Spherical colloids that catalyze the interconversion reaction $A
\leftrightharpoons B$ between solute molecules $A$ and $B$ whose concentration
at infinity is maintained away from equilibrium effectively interact due to the
non-uniform fields of solute concentrations. We show that this long range $1/r$
interaction is suppressed via a mechanism that is superficially reminiscent but
qualitatively very different from electrostatic screening: catalytic activity
drives the concentrations of solute molecules towards their equilibrium values
and reduces the chemical imbalance that drives the interaction between the
colloids. The imposed non-equilibrium boundary conditions give rise to a
variety of geometry-dependent scenarios; while long-range interactions are
suppressed (except for a finite penetration depth) in the bulk of the colloid
solution in 3D, they can persist in quasi-2D geometry in which the colloids but
not the solutes are confined to a surface, resulting in the formation of
clusters or Wigner crystals, depending on the sign of the interaction between
colloids.

14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
1
The categories of this paper are: cs
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga