Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear optical properties of electromagnetically-induced-transparency
  medium interacting with two quantized fields   We study linear and nonlinear optical properties of electromagnetically
induced transparency (EIT) medium interacting with two quantized laser fields
for adiabatic EIT case. We show that EIT medium exhibits normal dispersion.
Kerr and higher order nonlinear refractive-index coefficients are also
calculated in a completely analytical form. It is indicated that EIT medium
exhibits giant resonantly enhanced nonlinearities. We discuss the response of
the EIT medium to nonclassical light fields and find that the polarization
vanishes when the probe laser is initially in a nonclassical state of no
single-photon coherence.

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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: econ
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The categories of this paper are: nlin
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
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The categories of this paper are: patt-sol