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Proceedings Paper

Entangled Bessel beams
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Paper Abstract

Bessel-Gaussian (BG) modes possess unique characteristics that have been exploited in the classical world and which may also offer advantages over other modes in the quantum regime. The easily adjustable radial scale of BG modes provides a more favourable basis of orbital angular momentum (OAM) entanglement over Laguerre- Gaussian (LG) modes, where the radial dependence is often ignored. We demonstrate high-dimensional entanglement with the BG modes and show a higher fidelity than the LG modes. We use the reconstruction property of BG modes to recover the degree of entanglement of our quantum state after encountering an obstruction. By moving the obstruction along the path of propagation of the entangled photon pairs, we quantitatively show a increase in the degree of entanglement as the obstruction was moved beyond that minimum distance.

Paper Details

Date Published: 25 September 2014
PDF: 8 pages
Proc. SPIE 9194, Laser Beam Shaping XV, 919409 (25 September 2014); doi: 10.1117/12.2066369
Show Author Affiliations
Melanie McLaren, Univ. of the Witwatersrand (South Africa)
CSIR National Laser Ctr. (South Africa)
Thandeka Mhlanga, CSIR National Laser Ctr. (South Africa)
Miles J. Padgett, Univ. of Glasgow (United Kingdom)
Filippus S. Roux, CSIR National Laser Ctr. (South Africa)
Andrew Forbes, Univ. of the Witwatersrand (South Africa)
CSIR National Laser Ctr. (South Africa)

Published in SPIE Proceedings Vol. 9194:
Laser Beam Shaping XV
Andrew Forbes; Todd E. Lizotte, Editor(s)

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