Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New generation low-energy probes for ultralight axion and scalar dark
  matter   We present a brief overview of a new generation of high-precision laboratory
and astrophysical measurements to search for ultralight (sub-eV) axion,
axion-like pseudoscalar and scalar dark matter, which form either a coherent
condensate or topological defects (solitons). In these new detection methods,
the sought effects are linear in the interaction constant between dark matter
and ordinary matter, which is in stark contrast to traditional searches for
dark matter, where the sought effects are quadratic or higher order in the
underlying interaction constants (which are extremely small).

37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga