Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bose-Einstein condensation of photons in a plasma   We study the Bose-Einstein condensation of photons in a plasma, where we
include the cases of both transverse photons and plasmons. We consider
four-wave mixing processes of photon and plasmon modes in a relativistic
isotropic plasma to determine the coupling constant to lowest order. We further
show that photon condensation is possible in an unbounded plasma because, in
contrast with other optical media, plasmas introduce an effective photon mass.
This guarantees the existence of a finite chemical potential and a critical
temperature, which is calculated for both transverse photons and plasmons. By
considering four-wave mixing processes, we derive the interactions between the
photons in the condensate. We also study the elementary excitations (or
Bogoliubov modes) of the condensed photon and plasmon gases, and determine the
respective dispersion relations. Finally, we discuss the kinetics of photon
condensation via inverse Compton scattering between the photons and the
electrons in the plasma.

32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
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The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga