Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Universal 1+2-body bound states in planar atomic wave guides   Shallow heteronuclear trimers are predicted for mixtures of two atomic
species strongly trapped in a quasi two-dimensional atomic wave guide. The
binding energies are functions of the 2D-scattering length and of the mass
ratio and can be thus tuned by various ways. These universal trimers are
composed of two identical non interacting particles and of a third particle of
the other species. Depending on the statistics of the two identical particles,
the trimers have an odd (fermions) or even (bosons) internal angular momentum.
These results permit to draw conclusions on the stability issue for the
quasi-2D gaseous phase of heteronuclear dimers.

33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas