Tag Archives: parametric down-conversion

Context for Parametric conversion in semi-classical optics

Expansion and references to the 2009 ABB conference abstract While quantum theory is an incomplete description of reality (Einstein), its validity as a description of light/photons in non-linear crystals is questionable.  In the parametric down-conversion (PDC) phenomenon, a single-frequency laser beam … Continue reading

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Challenge to fans of QM ‘photons’

Describing light as ‘photons’ is of course just a model; QM is just a series of calculation procedures (algorithms), Schrödinger’s “Cat” paradox showed it to be self-contradictory, which remains unresolved, though fans of QM indulge in semantics (‘apparent’ paradox – … Continue reading

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Light as Waves versus Quantum Mechanics of Photons

Three challenges to fans of QM ‘photons’ ** Afshar’s 2-slit experiment: shows light ‘photons’ propagate as waves – discrete signals are created by the detection process (photo-electric effect) ** Down-conversion in crystals: the rainbow from a laser beam passing through … Continue reading

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