Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Molecules Near Absolute Zero and External Field Control of Atomic and
  Molecular Dynamics   This article reviews the current state of the art in the field of cold and
ultracold molecules and demonstrates that chemical reactions, inelastic
collisions and dissociation of molecules at subKelvin temperatures can be
manipulated with external electric or magnetic fields. The creation of
ultracold molecules may allow for spectroscopy measurements with extremely high
precision and tests of fundamental symmetries of nature, quantum computation
with molecules as qubits, and controlled chemistry. The probability of chemical
reactions and collisional energy transfer can be very large at temperatures
near zero Kelvin. The collision energy of ultracold atoms and molecules is much
smaller than perturbations due to interactions with external electric or
magnetic fields available in the laboratory. External fields may therefore be
used to induce dissociation of weakly bound molecules, stimulate forbidden
electronic transitions, suppress the effect of centrifugal barriers in outgoing
reaction channels or tune Feshbach resonances that enhance chemical reactivity.

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The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
9
The categories of this paper are: nlin