Abstract
We have measured the linear polarization correlation of the photons emitted in an atomic cascade of calcium. It has been shown by a generalization of Bell's inequality that the existence of local hidden variables imposes restrictions on this correlation in conflict with the predictions of quantum mechanics. Our data, in agreement with quantum mechanics, violate these restrictions to high statistical accuracy, thus providing strong evidence against local hidden-variable theories.
- Received 4 February 1972
DOI:https://doi.org/10.1103/PhysRevLett.28.938
©1972 American Physical Society
Focus
FocusNobel Prize: Quantum Entanglement Unveiled
Published 4 October 2022
The 2022 Nobel Prize in Physics honors research on the foundations of quantum mechanics, which opened up the quantum information frontier.
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