Entanglement and conservation of orbital angular momentum in spontaneous parametric down-conversion

Details Entanglement and conservation of orbital angular momentum in spontaneous parametric down-conversion Entanglement and conservation of orbital angular momentum in spontaneous parametric down-conversion

2005-03-02

arxiv.org/abs/quant-ph/0503029v1

Phys. Rev. A 69, 023811 (2004)

Physics

Quantum Physics

6 pages, 5 figures

Scientific paper

10.1103/PhysRevA.69.023811

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.

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