Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superfluorescence of Photonic Paint   We consider the cooperative decay of incoherently pumped atoms in a
disordered medium, where light undergoes multiple scattering. It is shown that
the cooperation number, which determines the duration and amplitude of
superfluorescent impulses, is given by the number of atoms along a diffusive
trajectory of the light propagating through the medium. We also consider the
problem of reflection of a probe wave during cooperative emission.

22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
19
The categories of this paper are: eess