Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generation of polarization-entangled photon pairs in a Bragg reflection
  waveguide   We demonstrate experimentally that spontaneous parametric down-conversion in
an AlGaAs semiconductor Bragg reflection waveguide can make for paired photons
highly entangled in the polarization degree of freedom at the telecommunication
wavelength of 1550 nm. The pairs of photons show visibility higher than 90% in
several polarization bases and violate a Clauser-Horne-Shimony-Holt Bell-like
inequality by more than 3 standard deviations. This represents a significant
step toward the realization of efficient and versatile self pumped sources of
entangled photon pairs on-chip.

32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat