Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precision Characterization of the $^2$D$_{5/2}$ State and Quadratic
  Zeeman Coefficient in $^{171}$Yb$^+$   We report measurements of the branching fraction, hyperfine constant, and
second-order Zeeman coefficient of the D$_{5/2}$ level in $^{171}$Yb$^+$ with
up to two orders-of-magnitude improvement in precision compared to previously
reported values. We estimate the electric quadrupole reduced matrix element of
the S$_{1/2}$ $\leftrightarrow$ D$_{5/2}$ transition to be 12.5(4) $e a_0^2$.
Furthermore, we determine the transition frequency of the F$_{7/2}$
$\leftrightarrow$ $^{1}$D$[3/2]_{3/2}$ at 760 nm with a $\sim$25-fold
improvement in precision. These measurements provide benchmarks for
quantum-many-body atomic-physics calculations and provide valuable data for
efforts to improve quantum information processors based on Yb$^+$.

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The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
2
The categories of this paper are: math
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The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
10
The categories of this paper are: q-bio