Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electron spin-flip correlations due to nuclear dynamics in driven GaAs
  double dots   We present experimental data and associated theory for correlations in a
series of experiments involving repeated Landau-Zener sweeps through the
crossing point of a singlet state and a spin aligned triplet state in a GaAs
double quantum dot containing two conduction electrons, which are loaded in the
singlet state before each sweep, and the final spin is recorded after each
sweep. The experiments reported here measure correlations on time scales from 4
$\mu$s to 2 ms. When the magnetic field is aligned in a direction such that
spin-orbit coupling cannot cause spin flips, the correlation spectrum has
prominent peaks centered at zero frequency and at the differences of the Larmor
frequencies of the nuclei, on top of a frequency-independent background. When
the spin-orbit field is relevant, there are additional peaks, centered at the
frequencies of the individual species. A theoretical model which neglects the
effects of high-frequency charge noise correctly predicts the positions of the
observed peaks, and gives a reasonably accurate prediction of the size of the
frequency-independent background, but gives peak areas that are larger than the
observed areas by a factor of two or more. The observed peak widths are roughly
consistent with predictions based on nuclear dephasing times of the order of 60
$\mu$s. However, there is extra weight at the lowest observed frequencies,
which suggests the existence of residual correlations on the scale of 2 ms. We
speculate on the source of these discrepancies.

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The categories of this paper are: atom-ph
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
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The categories of this paper are: q-fin
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex