John Stewart Bell

John Stewart Bell was a physicist from Belfast, Northern Ireland, who originated Bell theorem, an important result in quantum physics about hidden-variable theories. Born in 1928 to a working class family, he studied experimental physics and mathematical physics at Queens University Belfast and took a PhD at the University of Birmingham in 1956. He worked at the Harwell atomic energy laboratory and then, from 1960, at CERN in Geneva, where he did theoretical particle physics and accelerator design while pursuing the foundations of quantum theory as a sideline. The 2022 Nobel Prize in Physics recognised experimental tests of Bell inequalities.