Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bose-Einstein Condensation and strong-correlation behavior of phonons in
  ion traps   We show that the dynamics of phonons in a set of trapped ions interacting
with lasers is described by a Bose-Hubbard model whose parameters can be
externally adjusted. We investigate the possibility of observing several
quantum many-body phenomena, including (quasi) Bose-Einstein condensation as
well as a superfluid-Mott insulator quantum phase transition.

12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas