Abstract

Interference effects are a fundamental aspect of quantum theory; the two-particle entangled state is the basis of the EPR paradox and the related topic of Bell’s inequalities. We have performed an experiment which combines both of these aspects, resulting in two-particle interference which is both non-classical and non-local. This experiment was first proposed by Franson^[1], who considered the correlated photons from an atomic cascade. The source of our correlated particles is a KDP crystal pumped by a uv laser.

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