Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High and uniform coherence creation in Doppler broadened double
  lambda-like atomic system by a train of femtosecond optical pulses   We present a detailed analysis of coherence creation in a four level double
lambda-like atomic system using a train of ultra-short few-cycle Gaussian
pulses. The effect of the Doppler broadening has been analyzed. It is possible
to create high coherence across all the velocity groups in the atomic ensemble
using pulses with low repetition frequency. The accumulation of coherence at
different radial locations within the atomic beam cross-section as a function
of the number of pulses in the train is also reported. We find that pulse train
with lower repetition frequencies are able to generate high and nearly uniform
coherence in a substantial part of the atomic system.

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The categories of this paper are: cs
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
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The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: solv-int
30
The categories of this paper are: q-alg