Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ion-atom hybrid systems   The study of interactions between simultaneously trapped cold ions and atoms
has emerged as a new research direction in recent years. The development of
ion-atom hybrid experiments has paved the way for investigating elastic,
inelastic and reactive collisions between these species at very low
temperatures, for exploring new cooling mechanisms of ions by atoms and for
implementing new hybrid quantum systems. The present lecture reviews
experimental methods, recent results and upcoming developments in this emerging
field.

36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th