Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: All-Optical Delay of Images using Slow Light   Two-dimensional images carried by optical pulses (2 ns) are delayed by up to
10 ns in a 10 cm cesium vapor cell. By interfering the delayed images with a
local oscillator, the transverse phase and amplitude profiles of the images are
shown to be preserved. It is further shown that delayed images can be well
preserved even at very low light levels, where each pulse contains on average
less than one photon.

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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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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: bayes-an
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The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: math
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The categories of this paper are: astro-ph
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The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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The categories of this paper are: q-alg