When1: 1964
When2: 1987
Who: John S. Bell [Bell, John S.]
What: physicist
Where: Ireland
works\ Speakable and Unspeakable in Quantum Mechanics [1987]
Detail: He lived 1928 to 1990. Instruments can measure coupled-particle spins to see if spins are separable. Positive-spin number along first-particle x-axis and second-particle y-axis is less than or equal to positive-spin number along first-particle x-axis and second-particle z-axis plus positive-spin number along first-particle y-axis and second-particle z-axis {Bell inequality} {Bell's inequalities}. In quantum mechanics, Bell inequality is not true. Two particles are not separable. No local hidden variables exist [1964] {Bell's theorem, Bell}.
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Date Modified: 2022.0224