Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: AC sensing using nitrogen vacancy centers in a diamond anvil cell up to
  6 GPa   Nitrogen-vacancy color centers in diamond have attracted broad attention as
quantum sensors for both static and dynamic magnetic, electrical, strain and
thermal fields, and are particularly attractive for quantum sensing under
pressure in diamond anvil cells. Optically-based nuclear magnetic resonance may
be possible at pressures greater than a few GPa, and offers an attractive
alternative to conventional Faraday-induction based detection. Here we present
AC sensing results and demonstrate synchronized readout up to 6 GPa, but find
that the sensitivity is reduced due to inhomogeneities of the microwave field
and pressure within the sample space. These experiments enable the possibility
for all-optical high resolution magnetic resonance of nanoliter sample volumes
at high pressures.

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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: stat
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The categories of this paper are: hep-th
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The categories of this paper are: cs
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The categories of this paper are: q-bio
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The categories of this paper are: plasm-ph
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The categories of this paper are: physics
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The categories of this paper are: eess
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The categories of this paper are: cmp-lg
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th