Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Screened hydrodynamic interaction in a narrow channel   We study experimentally and theoretically the hydrodynamic coupling between
Brownian colloidal particles diffusing along a linear channel. The
quasi-one-dimensional confinement, unlike other constrained geometries, leads
to a sharply screened interaction. Consequently, particles move in concert only
when their mutual distance is smaller than the channel width, and two-body
interactions remain dominant up to high particle densities. The coupling in a
cylindrical channel is predicted to reverse sign at a certain distance, yet
this unusual effect is too small to be currently detectable.

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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
2
The categories of this paper are: math
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph