Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Control momentum entanglement with atomic spontaneously generated
  coherence   With atomic spontaneously generated coherence (SGC), we propose a novel
scheme to coherently control the atom--photon momentum entanglement through
atomic internal coherence. A novel phenomena of ``phase entanglement in
momentum'' is proposed, and we found, under certain conditions, that
super--high degree of momentum entanglement can be produced with this scheme.

17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph