Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Realization of the purely spatial Einstein-Podolsky-Rosen paradox in
  full-field images of spontaneous parametric down conversion   We demonstrate Einstein-Podolsky-Rosen (EPR) entanglement by detecting purely
spatial quantum correlations in the near and far fields of spontaneous
parametric down-conversion generated in a type-2 beta barium borate crystal.
Full-field imaging is performed in the photon-counting regime with an
electron-multiplying CCD camera. The data are used without any postselection,
and we obtain a violation of Heisenberg inequalities with inferred quantities
taking into account all the biphoton pairs in both the near and far fields by
integration on the entire two-dimensional transverse planes. This ensures a
rigorous demonstration of the EPR paradox in its original position momentum
form.

27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc