Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Isotropic-nematic transition of self-propelled rods in three dimensions   Using overdamped Brownian dynamics simulations we investigate the
isotropic-nematic (IN) transition of self-propelled rods in three spatial
dimensions. For two well-known model systems (Gay-Berne potential and hard
spherocylinders) we find that turning on activity moves to higher densities the
phase boundary separating an isotropic phase from a (nonpolar) nematic phase.
This active IN phase boundary is distinct from the boundary between isotropic
and polar-cluster states previously reported in two-dimensional simulation
studies and, unlike the latter, is not sensitive to the system size. We thus
identify a generic feature of anisotropic active particles in three dimensions.

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The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
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The categories of this paper are: q-alg
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
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The categories of this paper are: q-fin
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org