Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Einstein-Podolsky-Rosen correlations from colliding Bose-Einstein
  condensates   We propose an experiment which can demonstrate quantum correlations in a
physical scenario as discussed in the seminal work of Einstein, Podolsky and
Rosen. Momentum-entangled massive particles are produced via the four-wave
mixing process of two colliding Bose-Einstein condensates. The particles'
quantum correlations can be shown in a double double-slit experiment or via
ghost interference.

3
The categories of this paper are: physics
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat