Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Molecular states near a collision threshold   This chapter summarizes the properties of near-threshold molecular states
that can be formed from ultracold atoms. The properties of the states for a
single potential are characterized for different partial waves using the
concepts of quantum defect theory for a van der Waals potential. Examples are
given for various isotopes of the Yb_2 molecule. Magnetically tunable Feshbach
resonances or photoassociation resonances are characterized by the multichannel
version of the theory. Examples of the latter are given for the KRb molecule.

26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
23
The categories of this paper are: solv-int