Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Atoms near magnetodielectric bodies: van-der-Waals energy and
  Casimir-Polder force   Based on macroscopic QED in linear, causal media, we present a consistent
theory for the Casimir-Polder force acting on an atom positioned near
dispersing and absorbing magnetodielectric bodies. The perturbative result for
the van-der-Waals energy is shown to exhibit interesting new features in the
presence of magnetodielectric bodies. To go beyond perturbation theory, we
start with the center-of-mass equation of motion and derive a dynamical
expression for the Casimir-Polder force acting on an atom prepared in an
arbitrary electronic state. For a non-driven atom in the weak coupling regime,
the force as a function of time is shown to be a superposition of force
components that are related to the electronic density matrix elements at chosen
time. These force components depend on the position-dependent polarizability of
the atom that correctly accounts for the body-induced level shifts and
broadenings.

36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg