Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Atom-field entanglement in two-atom Jaynes-Cummings model with
  intensity-dependent coupling   An exact solution of the problem of two-atom one- and two-mode
Jaynes-Cummings model with intensity-dependent coupling is presented.
Asymptotic solutions for system state vectors are obtained in the approximation
of large initial coherent fields. The atom-field entanglement is investigated
on the basis of the reduced atomic entropy dynamics. The possibility of the
system being initially in a pure disentangled state to revive into this state
during the evolution process for both models is shown. Conditions and times of
disentanglement are derived.

2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th