Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Repulsive and attractive Casimir interactions in liquids   The Casimir interactions in the solid-liquid-solid systems as a function of
separation distance have been studied by the Lifshitz theory. The dielectric
permittivity functions for a wide range of materials are described by Drude,
Drude-Lorentz and oscillator models. We find that the Casimir forces between
gold and silica or MgO materials are both the repulsive and attractive. We also
find the stable forms for the systems. Our studies would provide a good
guidance for the future experimental studies on the dispersion interactions.

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The categories of this paper are: cs
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
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The categories of this paper are: math
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: gr-qc
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys