Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Qubit coherence control in a nuclear spin bath   Coherent dynamics of localized spins in semiconductors is limited by spectral
diffusion arising from dipolar fluctuation of lattice nuclear spins. Here we
extend the semiclassical theory of spectral diffusion for nuclear spins I=1/2
to the high nuclear spins relevant to the III-V materials and show that
applying successive qubit pi-rotations at a rate approximately proportional to
the nuclear spin quantum number squared (I^2) provides an efficient method for
coherence enhancement. Hence robust coherent manipulation in the large spin
environments characteristic of the III-V compounds is possible without
resorting to nuclear spin polarization, provided that the pi-pulses can be
generated at intervals scaling as I^{-2}.

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The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex