Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Control of the direction and rate of nuclear spin flips in InAs quantum
  dots using detuned optical pulse trains   We find that detuning an optical pulse train from electronic transitions in
quantum dots controls the direction of nuclear spin flips. The optical pulse
train generates electron spins that precess about an applied magnetic field,
with a spin component parallel to the field only for detuned pulses. This
component leads to asymmetry in the nuclear spin flips, providing a way to
produce a stable and precise value of the nuclear spin polarization. This
effect is observed using two-color, time-resolved Faraday rotation and
ellipticity.

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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: stat
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
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The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph