We show experimentally that quantum coincidence imaging with photon pairs generated by spontaneous parametric down conversion, in certain conditions, differs from the classical imaging in two aspects: the magnified image is produced by an ``apodized'' effective lens and its effective wavelength is the De Broglie wavelength of the photon pair λ∕2, where λ is the central wavelength of the single photon wave packet. Better resolution and apodization effects (reduced intensity of the diffraction fringes around the image) are observed in the detected images.
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Santos et al. (2005) studied this question.
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