Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-equilibrium Casimir-like Forces in Liquid Mixtures   In this Letter we consider a liquid mixture confined between two thermally
conducting walls subjected to a stationary temperature gradient. While in a
one-component liquid non-equilibrium fluctuation forces appear inside the
liquid layer only, non-equilibrium fluctuations in a mixture induce a
Casimir-like force on the walls. The physical reason is that the temperature
gradient induces large concentration fluctuations through the Soret effect.
Unlike temperature fluctuations, non-equilibrium concentration fluctuations are
also present near a perfectly thermally conducting wall. The magnitude of the
fluctuation-induced Casimir force is proportional to the square of the Soret
coefficient and is related to the concentration dependence of the heat and
volume of mixing.

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The categories of this paper are: supr-con
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The categories of this paper are: cs
7
The categories of this paper are: hep-th
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-lat
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The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
2
The categories of this paper are: math
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The categories of this paper are: dg-ga