Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-spin dephasing by electron-phonon interaction in semiconductor
  double quantum dots   We study electron-phonon interaction induced decoherence between two-electron
singlet and triplet states in a semiconductor double quantum dot using a
spin-boson model. We investigate the onset and time evolution of this
dephasing, and study its dependence on quantum dot parameters such as dot size
and double dot separations, as well as the host materials (GaAs and Si). At the
short time limit, electron-phonon interaction only causes an incomplete initial
Gaussian decay of the off-diagonal density matrix element in the
singlet-triplet Hilbert space. A complete long-time exponential decay due to
phonon relaxation would eventually dominate over two-spin decoherence. We
analyze two-spin decoherence in both symmetric and biased double quantum dots,
identifying their difference in electron-phonon coupling and the relevant
consequences.

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The categories of this paper are: patt-sol
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The categories of this paper are: math
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
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The categories of this paper are: stat
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph