Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Direct transfer of pump amplitude to parametric down-converted photons   We numerically and experimentally show that all photons generated by
spontaneous parametric down-conversion (SPDC) follow a transverse amplitude
similar to that of the pump. This amplitude transfer from pump to SPDC is
revealed in the Fourier image plane of the down-converted photons restricted by
an aperture. We also observe a considerable shift of the image plane from the
actual Fourier plane, when size of the aperture is gradually increased. The
shift of the Fourier image of down-converted photons affects the quality of
spatial mode-based projection in various quantum correlation experiments with
parametric down-converted photon pairs. The results may be useful in
applications of down-converted photons for quantum imaging and quantum
communication.

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The categories of this paper are: cond-mat
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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The categories of this paper are: math
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
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The categories of this paper are: econ