Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superradiance and enhanced luminescence from ensembles of a few
  self-assembled quantum dots   We study the evolution of photoluminescence (PL) from homogeneous and
inhomogeneous ensembles of a few coupled QDs. We discuss the relation between
signals from a given QD ensemble under strong and weak excitation (full
inversion and linear response regimes): A system homogeneous enough to manifest
superradiant emission when strongly inverted shows a non-exponential decay of
the PL signal under spatially coherent weak excitation. In an inhomogeneous
ensemble the PL decay is always nearly exponential with a qualitatively
different form of the time dependence in the two excitation regimes and with a
higher rate under weak excitation.

17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex