Quantum diffraction and interference of spatially correlated photon pairs generated by spontaneous parametric down-conversion

Details Quantum diffraction and interference of spatially correlated photon pairs generated by spontaneous parametric down-conversion Quantum diffraction and interference of spatially correlated photon pairs generated by spontaneous parametric down-conversion

2002-10-21

arxiv.org/abs/quant-ph/0210142v1

Physics

Quantum Physics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevA.67.041805

We demonstrate one- and two-photon diffraction and interference experiments utilizing parametric down-converted photon pairs (biphotons) and a transmission grating. With two-photon detection, the biphoton exhibits a diffraction-interference pattern equivalent to that of an effective single particle that is associated with half the wavelength of the constituent photons. With one-photon detection, however no diffraction-interference pattern is observed. We show that these phenomena originate from the spatial quantum correlation between the down-converted photons.

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