Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generation of photon number states   The Visible Light Photon Counter (VLPC) has the capability to discriminate
photon number states, in contrast to conventional photon counters which can
only detect the presence or absence of photons. We use this capability, along
with the process of parametric down-conversion, to generate photon number
states. We experimentally demonstrate generation of states containing 1,2,3 and
4 photons with high fidelity. We then explore the effect the detection
efficiency of the VLPC has on the generation rate and fidelity of the created
states.

16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an