Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Translational and rotational dynamics of a self-propelled Janus probe in
  crowded environments   We computationally investigate the dynamics of a self-propelled Janus probe
in crowded environments. The crowding is caused by the presence of viscoelastic
polymers or non-viscoelastic disconnected monomers. Our simulations show that
the translational, as well as rotational mean square displacements, have a
distinctive three-step growth for fixed values of self-propulsion force, and
steadily increase with self-propulsion, irrespective of the nature of the
crowder. On the other hand, in the absence of crowders, the rotational dynamics
of the Janus probe is independent of self-propulsion force. On replacing the
repulsive polymers with sticky ones, translational and rotational mean square
displacements of the Janus probe show a sharp drop. Since different faces of a
Janus particle interact differently with the environment, we show that the
direction of self-propulsion also affects its dynamics. The ratio of long-time
translational and rotational diffusivities of the self-propelled probe with a
fixed self-propulsion, when plotted against the area fraction of the crowders,
passes through a minima and at higher area fraction merges to its value in the
absence of the crowder. This points towards the decoupling of translational and
rotational dynamics of the self-propelled probe at intermediate area fraction
of the crowders. However, such translational-rotational decoupling is absent
for passive probes.

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The categories of this paper are: physics
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The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga