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We report on the generation of a source of bright entangled beams of high quality, which is long-term stable and is potentially useful in quantum communication systems. Our quantum correlations are measured and inferred to be Δ(X1 + X2)Δ(Y1−Y2) = 0.16 with a classical limit of this inference error product [1] equal to 1 and a demonstration of the EPR-paradox implying a value smaller than 1.
© 2000 IEEE
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