Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ghost imaging, quantum and classical aspects   We analytically show that it is possible to perform coherent imaging by using
the classical correlation of two beams obtained by splitting incoherent thermal
radiation. A formal analogy is demonstrated between two such classically
correlated beams and two entangled beams produced by parametric
down-conversion. Because of this analogy, the classical beams can mimic
qualitatively all the imaging properties of the entangled beams, even in ways
which up to now were not believed possible. A key feature is that these
classical beams are spatially correlated both in the near-field and in the
far-field. Using realistic numerical simulations the performances of a
quasi-thermal and a parametric down-conversion source are shown to be closely
similar, both for what concerns the resolution and statistical properties. The
results of this paper provide a new scenario for the discussion of what role
the entanglement plays in correlated imaging.

31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an