Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantization of Longitudinal Electric Waves in Plasmas   Effects of the Landau diamagnetism and the Pauli paramagnetism on the
longitudinal electric wave characteristics in a quantum plasma are studied. It
is shown that a dispersion relation of the longitudinal wave propagating along
a magnetic field strongly depends on the magnetic field, in radical contrast to
the classical case. New modes of quantum plasma waves due to the magnetic field
are found.

27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci