Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analytical approach on linear and nonlinear pulse propagations in an
  open Lambda-type molecular system with Doppler broadening   We develop a systematic analytical approach on linear and nonlinear pulse
propagations in an open Lambda-type molecular system with Doppler broadening.
In linear case, by using residue theorem and a spectrum decomposition method,
we prove that there exists a crossover from electromagnetically induced
transparency (EIT) to Autler-Townes splitting (ATS) for co-propagating
configuration of probe and control fields. However, there is no EIT and hence
no EIT-ATS crossover for counter-propagating configuration. We give various
explicit formulas, including probe-field spectrum decomposition, EIT condition,
width of EIT transparency window, as well as a comparison with the result of
cold molecules. Our analytical result agrees well with the experimental one
reported recently by A. Lazoudis et al. [Phys. Rev.A82, 023812 (2010)]. In
nonlinear case, by using the method of multiple-scales, we derive a nonlinear
envelope equation for probe-field propagation. We show that stable ultraslow
solitons can be realized in the open molecular system.

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The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: eess