Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vacuum force on an atom in a magnetodielectric cavity   We demonstrate that, according to a recently suggested Lorentz-force approach
to the Casimir effect, the vacuum force on an atom embedded in a material
cavity differs substantially from the force on an atom of the cavity medium.
The force on an embedded atom is of the familiar (van der Waals and
Casimir-Polder) type, however, more strongly modified by the cavity medium than
usually considered. The force on an atom of the cavity medium is of the
medium-assisted force type with rather unusual properties, as demonstrated very
recently [M. S. Tomas, Phys. Rev. A 71, 060101(R) (2005)]. This implies similar
properties of the vacuum force between two atoms in a medium.

14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat