Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High magnetic fields for fundamental physics   Various fundamental-physics experiments such as measurement of the
birefringence of the vacuum, searches for ultralight dark matter (e.g.,
axions), and precision spectroscopy of complex systems (including exotic atoms
containing antimatter constituents) are enabled by high-field magnets. We give
an overview of current and future experiments and discuss the state-of-the-art
DC- and pulsed-magnet technologies and prospects for future developments.

18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol