Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Casimir-Polder interaction between an atom and a small magnetodielectric
  sphere   On the basis of macroscopic quantum electrodynamics and point-scattering
techniques, we derive a closed expression for the Casimir-Polder force between
a ground-state atom and a small magnetodielectric sphere in an arbitrary
environment. In order to allow for the presence of both bodies and media,
local-field corrections are taken into account. Our results are compared with
the known van der Waals force between two ground-state atoms. To continuously
interpolate between the two extreme cases of a single atom and a macroscopic
sphere, we also derive the force between an atom and a sphere of variable
radius that is embedded in an Onsager local-field cavity. Numerical examples
illustrate the theory.

11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th