Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generation of Quantum Entanglement based on Electromagnetically Induced
  Transparency Media   Quantum entanglement is an essential ingredient for the absolute security of
quantum communication. Generation of continuous-variable entanglement or
two-mode squeezing between light fields based on the effect of
electromagnetically induced transparency (EIT) has been systematically
investigated in this work. Here, we propose a new scheme to enhance the degree
of entanglement between probe and coupling fields of coherent-state light by
introducing a two-photon detuning in the EIT system. This proposed scheme is
more efficient than the conventional one, utilizing the dephasing rate of
ground-state coherence, i.e., the decoherence rate to produce entanglement or
two-mode squeezing which adds far more excess fluctuation or noise to the
system. In addition, maximum degree of entanglement at a given optical depth
can be achieved with a wide range of the coupling Rabi frequency and the
two-photon detuning, showing our scheme is robust and flexible. It is also
interesting to note that while EIT is the effect in the perturbation limit,
i.e. the probe field being much weaker than the coupling field and treated as a
perturbation, there exists an optimum ratio of the probe to coupling
intensities to achieve the maximum entanglement. Our proposed scheme can
advance the continuous-variable-based quantum technology and may lead to
applications in quantum communication utilizing squeezed light.

12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex