Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Biphoton interference with a quantum dot entangled light source   We demonstrate optical interferometry beyond the limits imposed by the photon
wavelength using 'triggered' entangled photon pairs from a semiconductor
quantum dot. Interference fringes of the entangled biphoton state reveals a
periodicity half of that obtained with the single photon, and much less than
that of the pump laser. High fringe visibility indicates that biphoton
interference is less sensitive to decoherence than interference of two
sequential single photons. The results suggest that quantum interferometry may
be possible using a semiconductor LED-like device.

2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th