Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultralong-range Rydberg bi-molecules   We predict that ultralong-range Rydberg bi-molecules form in collisions
between polar molecules in cold and ultracold settings. The collision of
$\Lambda$-doublet nitric oxide (NO) with long-lived Rydberg NO($nf$, $ng$)
molecules forms ultralong-range Rydberg bi-molecules with GHz energies and
kilo-Debye permanent electric dipole moments. The Hamiltonian includes both the
anisotropic charge-molecular dipole interaction and the electron-NO scattering.
The rotational constant for the Rydberg bi-molecules is in the MHz range,
allowing for microwave spectroscopy of rotational transitions in Rydberg
bi-molecules. Considerable orientation of NO dipole can be achieved. The
Rydberg molecules described here hold promise for studies of a special class of
long-range bi-molecular interactions.

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The categories of this paper are: eess
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The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th