Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum repeater protocol in mixed single- and two-mode Tavis-Cummings
  models   In this paper we study the production of entanglement between two atoms which
are far from each other. We consider a system including eight two-level atoms
(1; 2;... ; 8) such that any atom with its adjacent atom is in atomic Bell
state, so that we have four separate pairs of maximally entangled states (i; i
+ 1) where i = 1; 3; 5; 7. Our purpose is to produce entanglement between the
atomic pair (1, 8), while these two distant atoms have no interaction. By
performing the interaction between adjacent nonentangled atomic pairs (2, 3) as
well as (6, 7), each pair with a two-mode quantized field, the entanglement is
produced between atoms (1, 4) and (5, 8), respectively. Finally, by applying an
appropriate Bell state measurement (BSM) on atoms (4, 5) or performing an
interaction between them with a single-mode field (quantum electrodynamic: QED
method), the qubit pair (1; 8) becomes entangled and so the quantum repeater is
successfully achieved. This swapped entanglement is then quantified via
concurrence measure and the effects of coupling coeficients and detuning on the
concurrence and success probability are numerically investigated. The maxima of
concurrence and success probability and the corresponding time periods have
been decreased by increasing the detuning in asymmetric condition in BSM
method. Also, the effects of detuning, initial interaction time and coupling
coeficient on the produced entanglement by QED method are considered.
Increasing (decreasing) of the detuning (interaction time) has destructive
effect on the swapped entanglement in asymmetric condition.

18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin