Entanglement and conservation of orbital angular momentum in spontaneous parametric down-conversion
- 25 February 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 69 (2), 023811
- https://doi.org/10.1103/physreva.69.023811
Abstract
We show that the transfer of the plane-wave spectrum of the pump beam to the fourth-order transverse spatial correlation function of the two-photon field generated by spontaneous parametric down-conversion leads to the conservation and entanglement of orbital angular momentum of light. By means of a simple experimental setup based on fourth-order (or two-photon) interferometry, we show that our theoretical model provides a good description for down-converted fields carrying orbital angular momentum.Keywords
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