Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Single photon wavefront-splitting interference: An illustration of the
  light quantum in action   We present a new realization of the textbook experiment consisting in
single-photon interference based on the pulsed, optically excited
photoluminescence of a single colour centre in a diamond nanocrystal.
Interferences are created by wavefront-splitting with a Fresnel's biprism and
observed by registering the "single-photon clicks" with an intensified CCD
camera. This imaging detector provides also a real-time movie of the build-up
of the single-photon fringes. We perform a second experiment with two detectors
sensitive to photons that follow either one or the other interference path.
Evidence for single photon behaviour is then obtained from the absence of time
coincidence between detections in these two paths.

22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph