Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational Hertz experiment with electromagnetic radiation in a
  strong magnetic field   Brief review of principal ideas in respect of the high frequency
gravitational radiation generated and detected in the laboratory condition is
presented. Interaction of electro-magnetic and gravitational waves into a
strong magnetic field is considered as a more promising variant of the
laboratory GW-Hertz experiment. The formulae of the direct and inverse
Gertsenshtein-Zeldovich effect are derived. Numerical estimates are given and a
discussion of a possibility of observation of these effects in a lab is carried
out.

20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas