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On the contrary: "Many generations of graduate students who might have been tempted to try to construct hidden-variables theories were beaten into submission b
by meroes 5y ago
On the contrary:
"Many generations of graduate students who might have been tempted to try to construct hidden-variables theories were beaten into submission by the claim that von Neumann, 1932, had proved that it could not be done. A few years later (see Jammer, 1974,p.273) Grete Hermann, 1935, pointed out a glaring deficiency in the argument, but she seems to have been entirely ignored. Everybody continued to cite the von Neumann proof. A third of a century passed before John Bell, 1966, rediscovered the fact that von Neumann's no-hidden-variables proof was based on an assumption that can only be described as silly." Mermin https://cqi.inf.usi.ch/qic/Mermin1993.pdf https://cqi.inf.usi.ch/qic/Mermin1993.pdf
No one is infallible, and this kind of mythical status has problems. Grete was dismissed, and Bell's paper only was admitted because the editor thought it was confirming Von Nuemman even. And even if von Neumman's proof wasn't as "silly" as Bell said, the fact that everyone else ran with it surely harmed quantum theory for a long while, reinforcing the Copenhagen side unjustifiably at the expense of others.
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- DalasNoin 5y agoInteresting citation, I had heard of John Bell's theorem, which disproves local hidden variable theories. But I did not know that von Neumann had his own attempt at disproving these theories. Researching this a little further, I also found people arguing that von Neumanns arguments were misconstrued by Bell. https://arxiv.org/abs/1006.0499 https://arxiv.org/abs/1006.0499 I wonder how Grete Hermann's arguments compare to the arguments from Bell and what the real truth is.
- meroes 5y agoYa I am not an expert to judge if Bell, Grete, and Mermin also misunderstood von Neumman, and I see a few papers argue that. But the larger physics community does seem to agree with Bell's take. I do find it a bit weird that paper is using an entire page of what von Neumman would have said in response.