Greenberger, Horne, Shimony and Zeilinger: Bell's theorem without inequalities

What changed

Derived multipartite quantum versus local-realistic contradiction without an inequality.

Scientific scope

The record is the exact four-author 1990 American Journal of Physics paper. It does not absorb the earlier three-author book chapter, Mermin's reformulations, later GHZ experiments or loophole-free experimental validation.

Evidence

The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The record is the exact four-author 1990 American Journal of Physics paper. It does not absorb the earlier three-author book chapter, Mermin's reformulations, later GHZ experiments or loophole-free experimental validation.

Contributors

• Daniel M. Greenberger · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
• Michael A. Horne · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
• Abner Shimony · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
• Anton Zeilinger · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.

• AIP DOI for Bell theorem without inequalities

Provisional WRS assessment, edition 2026-10-28.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.

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