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John Stewart Bell

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1928 – 1990 · Quantum mechanics, Particle physics, Philosophy of physics
Northern Irish physicist, author of Bell's theorem, which became a cornerstone in the understanding of quantum entanglement and proved the incompleteness of local hidden-variable theories. His work transformed philosophical debates about quantum mechanics into experimentally testable science.

Biography

John Stewart Bell was born in Belfast, Northern Ireland. He studied physics at Queen's University Belfast, then received his doctorate from the University of Birmingham. He spent most of his career at the European Organization for Nuclear Research (CERN) in Switzerland, working on accelerator theory and particle physics. In his free time, he pondered the foundations of quantum mechanics. In 1964, he published his famous theorem, which showed that any local theory contradicts the statistics of experiments with entangled particles. For this work, he received many awards, including the Hughes Medal and the Heineman Prize.

Key discoveries

💡 Bell was a vegetarian and a passionate paragliding enthusiast. He said that quantum mechanics was his hobby, and his main work at CERN was accelerators. His paper with the theorem was written during a vacation and published in a little-known journal.
Quote: "Bell's inequalities are a way to test whether the world is hiding up the magician's sleeve."
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Related tags
quantum entanglementquantum informationquantum measurementWave Function Collapse
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superposition principleBell's theoremCPT theorem
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Alain AspectErwin SchrödingerDavid DeutschNiels BohrSerge HarocheDavid BohmCharles BennettJohn von Neumann

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