Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Slow light in paraffin-coated Rb vapor cells   We present preliminary results from an experimental study of slow light in
anti-relaxation-coated Rb vapor cells, and describe the construction and
testing of such cells. The slow ground state decoherence rate allowed by coated
cell walls leads to a dual-structured electromagnetically induced transparency
(EIT) spectrum with a very narrow (<100 Hz) transparency peak on top of a broad
pedestal. Such dual-structure EIT permits optical probe pulses to propagate
with greatly reduced group velocity on two time scales. We discuss ongoing
efforts to optimize the pulse delay in such coated cell systems.

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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
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The categories of this paper are: chem-ph
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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: math
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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The categories of this paper are: astro-ph