Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Noise reduction in photon counting by exploiting spatial correlations   Joint photocount distributions of a weak twin beam acquired by an iCCD camera
are analyzed with respect to the beam spatial correlations. A method for
extracting these correlations from the experimental joint photocount
distributions is suggested using a suitable statistical model that quantifies
the contribution of spatial correlations to the joint photocount distributions.
In detail, the profile of twin-beam intensity spatial cross-correlation
function is revealed from the curve that gives the genuine mean photon-pair
number (both photons from a pair are detected) as a function of the extent of
the detection area. Also, the principle of reducing the noise in
photon-number-resolving detection by using spatial correlations is
experimentally demonstrated.

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The categories of this paper are: astro-ph
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The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci
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The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
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The categories of this paper are: econ