Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin waves and spin instabilities in quantum plasmas   We describe main ideas of method of many-particle quantum hydrodynamics
allows to derive equations for description of quantum plasma evolution. We also
present definitions of collective quantum variables suitable for quantum
plasmas. We show that evolution of magnetic moments (spins) in quantum plasmas
leads to several new branches of wave dispersion: spin-electromagnetic plasma
waves and self-consistent spin waves. Propagation of neutron beams through
quantum plasmas is also considered. Instabilities appearing due to interaction
of magnetic moments of neutrons with plasma are described.

16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph