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Phys. Rev. Lett. 47, 460–463 (1981)

Experimental Tests of Realistic Local Theories via Bell's Theorem

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Alain Aspect, Philippe Grangier, and Gérard Roger
Institut d'Optique Théorique et Appliquée, Université Paris-Sud, F-91406 Orsay, France

Received 30 March 1981; published in the issue dated 17 August 1981

We have measured the linear polarization correlation of the photons emitted in a radiative atomic cascade of calcium. A high-efficiency source provided an improved statistical accuracy and an ability to perform new tests. Our results, in excellent agreement with the quantum mechanical predictions, strongly violate the generalized Bell's inequalities, and rule out the whole class of realistic local theories. No significant change in results was observed with source-polarizer separations of up to 6.5 m.

© 1981 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.47.460
DOI:
10.1103/PhysRevLett.47.460
PACS:
03.65.Bz, 32.50.+d, 32.80.Kf