Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Limits on the deterministic creation of pure single-photon states using
  parametric down-conversion   Parametric down-conversion (PDC) is one of the most widely used methods to
create pure single-photon states for quantum information applications. However
little attention has been paid to higher-order photon components in the PDC
process, yet these ultimately limit the prospects of generating single-photons
of high quality. In this paper we investigate the impacts of higher-order
photon components and multiple frequency modes on the heralding rates and
single-photon fidelities. This enables us to determine the limits of PDC
sources for single-photon generation. Our results show that a perfectly
single-mode PDC source in conjunction with a photon-number resolving detector
is ultimately capable of creating single-photon Fock states with unit fidelity
and a maximal state creation probability of 25%. Hence an array of 17 switched
sources is required to build a deterministic (>99% emission probability) pure
single-photon source.

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
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas