Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photon dispersion relations in $A_0$-background   We calculate the photon dispersion relations generated by the quark loop in a
quark-gluon plasma with the color $A_0$ background condensate $A_0^c = A_0^{c3}
+ A_0^{c8}$ = const. It is found that both transversal and longitudinal modes
are exited. They have a gap at low momenta and are stable in high temperature
approximation. The background fields act as imaginary chemical potentials and
decrease the photon frequencies compared to the case of zero background. The
comparison with QED plasma with chemical potential is discussed.

8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph