Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interfacing a quantum dot with a spontaneous parametric down-conversion
  source   Quantum networks require interfacing stationary and flying qubits. These
flying qubits are usually nonclassical states of light. Here we consider two of
the leading source technologies for nonclassical light, spontaneous parametric
down-conversion and single semiconductor quantum dots. Down-conversion delivers
high-grade entangled photon pairs, whereas quantum dots excel at producing
single photons. We report on an experiment that joins these two technologies
and investigates the conditions under which optimal interference between these
dissimilar light sources may be achieved.

2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol