Generation of spatially broadband twin beams for quantum imaging

We generate spatially multimode twin beams using 4-wave mixing in a hot atomic vapor in a phase-insensitive traveling-wave amplifier configuration. The far-field coherence area measured at 3.5 MHz is shown to be much smaller than the angular bandwidth of the process and bright twin images with indep...

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Bibliographic Details
Published in:Physical review letters 2008-04, Vol.100 (14), p.143601-143601, Article 143601
Main Authors: Boyer, V, Marino, A M, Lett, P D
Format: Article
Language:English
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Summary:We generate spatially multimode twin beams using 4-wave mixing in a hot atomic vapor in a phase-insensitive traveling-wave amplifier configuration. The far-field coherence area measured at 3.5 MHz is shown to be much smaller than the angular bandwidth of the process and bright twin images with independently quantum-correlated subareas can be generated with little distortion. The available transverse degrees of freedom form a high-dimensional Hilbert space that we use to produce quantum-correlated twin beams with finite orbital angular momentum.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.100.143601