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In a new paper, researchers say they've proved that two realities can exist at once, at least when it comes to the quantum world.
To investigate their hypothesis, researchers at the Department of Experimental Physics at the University of Innsbrück in Austria tackled one of the world's most confounding thought experiments, called 'Wigner's Friend.'
Experiment - Progenitor - Nobel - Prize-winning - Physicist
The experiment, named after its progenitor, the Nobel Prize-winning physicist Eugene Wigner, was posited in 1961 and involves two people observing the same thing — in this case, a single photon.
When the photon is observed, it is displayed in either a horizontal or vertical state, but according to quantum mechanics, before that observation is made, it exists in a state of 'superposition' meaning that it is in both states at once — horizontal and vertical.
Wigner - Experiment - Person - Laboratory - Photon
In Wigner's experiment, one person in a laboratory observes the photon, sending it to either a vertical or horizontal state, while Wigner, who is outside of the laboratory, runs a simple test called an 'interference experiment' to prove that the photon is still in a state of superposition.
In the thought experiment, both observations, and therefore both the realities they represent, can...
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