Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heralded single-photon source utilizing highly nondegenerate, spectrally
  factorable spontaneous parametric downconversion   We report on the generation of an indistinguishable heralded single-photon
state, using highly nondegenerate spontaneous parametric downconversion (SPDC).
Spectrally factorable photon pairs can be generated by incorporating a
broadband pump pulse and a group-velocity matching (GVM) condition in a
periodically-poled potassium titanyl phosphate (PPKTP) crystal. The heralding
photon is in the near IR, close to the peak detection efficiency of
off-the-shelf Si single-photon detectors; meanwhile, the heralded photon is in
the telecom L-band where fiber losses are at a minimum. We observe spectral
factorability of the SPDC source and consequently high purity (90%) of the
produced heralded single photons by several different techniques. Because this
source can also realize a high heralding efficiency (> 90%), it would be
suitable for time-multiplexing techniques, enabling a pseudo-deterministic
single-photon source, a critical resource for optical quantum information and
communication technology.

33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga