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Bell's theorem is a term encompassing a number of closely related results in physics, all of which determine that quantum mechanics is incompatible with local hidden-variable theories, given some basic assumptions about the nature of measurement. "Local" here refers to the principle of locality, the idea that a particle can only be influenced ...
Jul 21, 2004 · Bell’s Theorem is the collective name for a family of results, all of which involve the derivation, from a condition on probability distributions inspired by considerations of local causality, together with auxiliary assumptions usually thought of as mild side-assumptions, of probabilistic predictions about the results of spatially separated experiments that conflict, for appropriate choices ...
- Wayne Myrvold, Marco Genovese, Abner Shimony
- 2004
Bell's theorem shows that standard QM is inconsistent with local realism. Local realism is a very general principle that was not originally thought to make any testable physical predictions. A major part of Bell's achievement was showing that Bell's inequality is implied by local realism, while standard QM predictions violate it.
Jul 20, 2021 · Bell’s theorem upended one of our most deeply held intuitions about physics, and prompted physicists to explore how quantum mechanics might enable tasks unimaginable in a classical world. “The quantum revolution that’s happening now, and all these quantum technologies — that’s 100% thanks to Bell’s theorem,” says Krister Shalm , a quantum physicist at the National Institute of ...
Bell's theorem is an important philosophical and mathematical statement in the theory of quantum mechanics. It showed that a category of physical theories called local hidden variables theory could not account for the degree of correlations between the spins of entangled electrons predicted by quantum theory. The commonly accepted conclusion of the theorem is that quantum theory is ...
Jan 14, 2014 · Bell’s theorem draws a line in the sand between the strange quantum world and the familiar classical world that we know and love. It proves that hidden variable theories like the kind that ...
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Nov 29, 2021 · This completes our proof of Bell's Theorem. The same theorem can be applied to measurements of the polarization of light, which is equivalent to measuring the spin of photon pairs. The experiments have been done. For electrons the left polarizer is set at 45 degrees and the right one at zero degrees.
