Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetoacoustic Resonance to Probe Quadrupole-Strain Coupling in a
  Diamond Nitrogen-Vacancy Center as a Spin-Triplet System   A theory of magnetoacoustic resonance is proposed to measure
quadrupole-strain couplings in a spin-triplet state with the $C_{3v}$ point
group symmetry, considering the spin-strain interaction in a diamond
nitrogen-vacancy (NV) center. Based on the Floquet theory, we demonstrate how
the single- and two-phonon transition probabilities depend on the change in the
longitudinal and transverse quadrupole couplings, which can be controlled by
rotating an applied magnetic field, around the threefold axis. The obtained
quadrupole dynamics results are useful for realizing mechanical or ac
strain-control of the NV spin as an alternative to the conventional magnetic
control by spin resonance.

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The categories of this paper are: nucl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: nlin
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The categories of this paper are: alg-geom
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The categories of this paper are: physics
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The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: stat
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The categories of this paper are: econ
0
The categories of this paper are: hep-ph