Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rotational state microwave mixing for laser cooling of complex diatomic
  molecules   We demonstrate the mixing of rotational states in the ground electronic state
using microwave radiation to enhance optical cycling in the molecule yttrium
(II) monoxide (YO). This mixing technique is used in conjunction with a
frequency modulated and chirped continuous wave laser to slow longitudinally a
cryogenic buffer gas beam of YO. We generate a measurable flux of YO below
10~m/s, directly loadable into a three-dimensional magneto-optical trap. This
technique opens the door for laser cooling of molecules with more complex
structure.

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The categories of this paper are: astro-ph
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: math
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The categories of this paper are: eess
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The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ph
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The categories of this paper are: stat
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int