Experimental tests of Bell’s inequality turned a theoretical question about quantum correlations into a measurable comparison. The discussion introduces the early experiment and the subsequent effort to test those correlations with increasingly demanding setups.
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44:45>> Big shout out to Kenny. 1972 first experimental test of Bell's inequality. >> Yeah. So um this was physicists John Clauser and Stuart Freriedman at University of California Berkeley. He read Bell's paper and at the time nobody was really taking it seriously even though Belle had proposed hey here's an experiment you can do >> right >> John Clauser is like well maybe I can do the experiment. >> He does that experiment there. It shows the photos of that. um and he showed that the universe does indeed violate Bell's inequality, meaning there are no hidden variables. Later on, this became a huge topic of research and now physicists all over the world are doing
45:26bigger and bigger tests of Bell's inequality. For that, John Clauser had a share in the Nobel Prize in physics in 2022. This is the idea of the theory moving into the experimental and then continuing to scale up the experimental to make sure at the limits of whatever it is we can do it still holds true. >> Yep.