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Spontaneous parametric down-conversion

Spontaneous parametric down-conversion (also known as SPDC, parametric fluorescence or parametric scattering) is a nonlinear instant optical process that converts one photon of higher energy (namely, a pump photon) into a pair of photons (namely, signal and idler photons) of lower energy, in accordance with the laws of energy conservation and momentum…

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Spontaneous parametric down-conversion

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photons photon pairs spdc crystal pump nonlinear two optical momentum used beam known pair signal idler entangled polarization type quantum

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