Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonclassical character of statistical mixtures of the single-photon and
  vacuum optical states   We demonstrate, theoretically and experimentally, that statistical mixtures
of the vacuum state |0> and the single-photon Fock state |1> are nonclassical
according to the Vogel criterion (W. Vogel, Phys. Rev. Lett. 84, 1849 (2000)),
regardless of the vacuum fraction. The ensembles are synthesized via
conditional measurements on biphotons generated by means of parametric
downconversion, and their quadrature statistics are measured using balanced
homodyne detection. A comparative review of various quantum state
nonclassicality criteria is presented.

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The categories of this paper are: alg-geom
19
The categories of this paper are: eess
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin