Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Color Instabilities in the Quark-Gluon Plasma   When the quark-gluon plasma (QGP) - a system of deconfined quarks and gluons
- is in a nonequilibrium state, it is usually unstable with respect to color
collective modes. The instabilities, which are expected to strongly influence
dynamics of the QGP produced in relativistic heavy-ion collisions, are
extensively discussed under the assumption that the plasma is weakly coupled.
We begin by presenting the theoretical approaches to study the QGP, which
include: field theory methods based on the Keldysh-Schwinger formalism,
classical and kinetic theories, and fluid techniques. The dispersion equations,
which give the spectrum of plasma collective excitations, are analyzed in
detail. Particular attention is paid to a momentum distribution of plasma
constituents which is obtained by deforming an isotropic momentum distribution.
Mechanisms of chromoelectric and chromomagnetic instabilities are explained in
terms of elementary physics. The Nyquist analysis, which allows one to
determine the number of solutions of a dispersion equation without explicitly
solving it, and stability criteria are also discussed. We then review various
numerical approaches - purely classical or quantum - to simulate the temporal
evolution of an unstable quark-gluon plasma. The dynamical role of
instabilities in the processes of plasma equilibration is analyzed.

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The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys