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Opt Express. 2007 May 14;15(10):6431-8.

Mode counting in high-dimensional orbital angular momentum entanglement.

Author information

  • 1Huygens Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands. mvexter@molphys.leidenuniv.nl

Abstract

We study the high-dimensional orbital angular momentum OAM) entanglement contained in the spatial profiles of two quantum-correlated photons. For this purpose, we use a multi-mode two-photon interferometer with an image rotator in one of the interferometer arms. By measuring the two-photon visibility as a function of the image rotation angle we measure the azimuthal Schmidt number, i.e., we count the number of OAM modes involved in the entanglement; in our setup this number is tunable from 1 to 8.

PMID:
19546949
[PubMed]
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