| has gloss | eng: GHZ experiments are a class of experiments which arise in quantum mechanics, in discussion and experimental determination of whether local hidden variables are required for, or even compatible with, the representation of experimental results; and with particular relevance to the EPR experiment. The GHZ experiments are distinguished by involving more than two observers or detectors. They are named for Daniel M. Greenberger, Michael A. Horne, and Anton Zeilinger (GHZ) who first analyzed certain measurements involving four observers [1], and who subsequently (together with A. Shimony, upon a suggestion by N. D. Mermin) applied their arguments to certain measurements involving three observers [2]. |