Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Active gels, heavy tails, and the cytoskeleton   The eukaryotic cell's cytoskeleton is a prototypical example of an active
material: objects embedded within it are driven by molecular motors acting on
the cytoskeleton, leading to anomalous diffusive behavior. Experiments tracking
the behavior of cell-attached objects have observed anomalous diffusion with a
distribution of displacements that is non-Gaussian, with heavy tails. This has
been attributed to "cytoquakes" or other spatially extended collective effects.
We show, using simulations and analytical theory, that a simple continuum
active gel model driven by fluctuating force dipoles naturally creates heavy
power-law tails in cytoskeletal displacements. We predict that this power law
exponent should depend on the geometry and dimensionality of where force
dipoles are distributed through the cell; we find qualitatively different
results for force dipoles in a 3D cytoskeleton and a quasi-two-dimensional
cortex. We then discuss potential applications of this model both in cells and
in synthetic active gels.

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The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
26
The categories of this paper are: bayes-an
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The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: cs
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
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The categories of this paper are: hep-th