Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exact theoretical description of two ultracold atoms in a single site of
  a 3D optical lattice using realistic interatomic interaction potentials   A theoretical approach was developed for an exact numerical description of a
pair of ultracold atoms interacting via a central potential that are trapped in
a three-dimensional optical lattice. The coupling of center-of-mass and
relative-motion coordinates is explicitly considered using a
configuration-interaction (exact-diagonalization) technique. Deviations from
the harmonic approximation are discussed for several heteronuclear alkali-metal
atom pairs trapped in a single site of an optical lattice. The consequences are
discussed for the analysis of a recent experiment [C. Ospelkaus et al, Phys.
Rev. Lett. 97, 120402 (2006)] in which radio-frequency association was used to
create diatomic molecules from a fermionic and a bosonic atom and to measure
their binding energies close to a magnetic Feshbach resonance.

10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph