Quantum diffraction and interference of spatially correlated photon pairs generated by spontaneous parametric down-conversion
- 25 April 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 67 (4), 041805
- https://doi.org/10.1103/physreva.67.041805
Abstract
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.Keywords
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