Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic trapping and coherent control of laser-cooled molecules   We demonstrate coherent microwave control of the rotational, hyperfine and
Zeeman states of ultracold CaF molecules, and the magnetic trapping of these
molecules in a single, selectable quantum state. We trap about $5\times 10^{3}$
molecules for 2 s at a temperature of 65(11) $\mu$K and a density of $1.2
\times 10^{5}$ cm$^{-3}$. We measure the state-specific loss rate due to
collisions with background helium.

15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph