Alain Aspect’s experiments on Bell’s theorem: a turning point in the history of the research on the foundations of quantum mechanics

Alain Aspect’s three experiments on Bell’s theorem, published in the early 1980s, were a turning point history of research foundations quantum mechanics not only because they corroborated entanglement as distinctive signature but also these brought wider recognition to this field and Aspect himself. These may be considered most direct precursors information, which would blossom decade later. John Bell (1928–1990)—on board, drawing 1982 experiment with two-channel polarizers. Courtesy: Nature