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Entangled spin 1/2 particle pairs versus hidden variables

Entangled spin 1/2 particle pairs versus hidden variables

The Entangled spin ½ particle pairs versus hidden variables simulation allows students to assess whether a simple hidden variable theory would agree with measurement outcomes predicted by quantum theory. The simulation shows a source of particle pairs in the middle of two Stern-Gerlach apparatuses (SGAs), that can each individually be oriented at three axes at 120 degrees to one another. The observers measure outcomes of + or  –  (depicted as flashes on screens) irrespective of orientation depending on whether the deflection is positive or negative along the measurement axis. When the main controls are set to “Quantum theory”, the particles pairs are entangled and always give opposite results when both SGAs have the same orientation. When the main controls are set to “Hidden variable... Show More
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