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Quantum mechanics

Quantum mechanics

Experiments with quantum cause and effect reveal hidden nonclassicality

26 May 2022 Jessica Tucker 
A photo of optical components bathed in blue light
Exploring cause and effect A photo of the Sagnac interferometer used to generate polarization-entangled photon pairs during a basis measurement. (Courtesy: Davide Poderini/Sapienza University of Rome)
Cause-and-effect explanations like “catnip causes cats to be happy”, “jokes cause laughter”

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