Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic Field Induced Two-Body Phenomena in Atoms   We report on a number of recently discovered phenomena which arise due to the
interaction of the collective (CM) and internal motion of atoms moving in
magnetic fields. For neutral atoms the properties of the so-called giant dipole
states are discussed and their experimental preparation is outlined. For ions
moving in magnetic fields the energy flow between the collective and electronic
motions is studied. For low CM velocities this results in a crossover from
localization to delocalization with respect to the spreading of the mixing of
the CM and internal motion in quantum number space. Large CM velocities induce
for both the classical as well as quantum ion the self-ionization process.
Future perspectives for both multi-electron atoms as well as molecules are
drawn.

17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess