Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical Evidence for Thermally Induced Monopoles   Electrical charges are conserved. The same would be expected to hold for
magnetic charges, yet magnetic monopoles have never been observed. It is
therefore surprising that the laws of non-equilibrium thermodynamics, combined
with Maxwell's equations, suggest that colloidal particles heated or cooled in
certain polar or paramagnetic solvents may behave as if they carry an
electrical/magnetic charge [J. Phys. Chem. B $\textbf{120}$, 5987 (2016)]. Here
we present numerical simulations that show that the field distribution around a
pair of such heated/cooled colloidal particles agrees quantitatively with the
theoretical predictions for a pair of oppositely charged electrical or magnetic
monopoles. However, in other respects, the non-equilibrium colloids do not
behave as monopoles: they cannot be moved by a homogeneous applied field. The
numerical evidence for the monopole-like fields around heated/cooled colloids
is crucial because the experimental and numerical determination of forces
between such colloids would be complicated by the presence of other effects,
such as thermophoresis.

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The categories of this paper are: econ
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
9
The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys