Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tomographic reconstruction of the single-photon Fock state by
  high-frequency homodyne detection   A single-photon Fock state has been generated by means of conditional
preparation from a two-photon state emitted in the process of spontaneous
parametric down-conversion. A recently developed high-frequency homodyne
tomography technique has been used to completely characterize the Fock state by
means of a pulse-to-pulse analysis of the detectors' difference photocurrent.
The density matrix elements of the generated state have been retrieved with a
final detection efficiency of about 57%. A comparison has been performed
between the phase-averaged tomographic reconstructions of the Wigner function
as obtained from the measured density-matrix elements and from a direct Abel
transform of the homodyne data. The ability of our system to work at the full
repetition rate of the pulsed laser (82 MHz) substantially simplifies the
detection scheme, allowing for more ``exotic'' quantum states to be generated
and analyzed.

3
The categories of this paper are: physics
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol