Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strategies for reducing the light shift in atomic clocks   Recent progress in optical lattice clocks requires unprecedented precision in
controlling systematic uncertainties at $10^{-18}$ level. Tuning of nonlinear
light shifts is shown to reduce lattice-induced clock shift for wide range of
lattice intensity. Based on theoretical multipolar, nonlinear, anharmonic and
higher-order light shifts, we numerically demonstrate possible strategies for
Sr, Yb, and Hg clocks to achieve lattice-induced systematic uncertainty below
$1\times 10^{-18}$.

12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
19
The categories of this paper are: eess