5 ms·
"Interestingly, both alternative classical mechanics and quantum theories can be supplemented by additional variables in such a way that the supplemented theory
by kavalec 8y ago
"Interestingly, both alternative classical mechanics and quantum theories can be supplemented by additional variables in such a way that the supplemented theory is deterministic."
This sounds like "hidden variable" and is not true for quantum physics.
- Retric 8y agoIt is, but you need to give up more and allow information to travel faster than light speed. It's local hidden variables that are a problem.
- kgwgk 8y agoNon-locality != faster-than-light communication
- Retric 8y agoAs I understand it 'Spooky action at a distance' does not allow communication, but in for hidden variable theory to work a particle needs access to another particles hidden variables. Unless you want to suggest another model?
- kgwgk 8y agoWhy is non-locality a problem for hidden variables theories and not for the "standard" interpretation of quantum mechanics?
- Retric 8y agoQuantom mechanics is based on non-locality, that's one of the things people have problems with. Quantum key distribution for example is seems to be based on this https://en.wikipedia.org/wiki/Quantum_key_distribution https://en.wikipedia.org/wiki/Quantum_key_distribution. As to the truth well ¯\_(ツ)_/¯
- kgwgk 8y agoI thought you said that the hidden-variables extension of quantum mechanics is "bad" (compared to the "vanilla" QM) because you need to allow information to travel faster than light speed. But I agree if you meant that QM (both non-local hidden-variables and standard interpretation) requires non-locality, unlike local hidden-variables theories which are ruled out by the violation of Bell inequalities which has been established experimentally.
- Retric 8y agoHidden variables where specificly proposed as a solution to non-locality. So, I just mean bad in that they did not solve that problem.
- kgwgk 8y agoTrue. However, unlike the "standard" QM interpretation, the non-local hidden-variables theories are deterministic (which is the reason why they were mentioned in this thread a few messages back).
- deepsun 8y agoLocal hidden variables are not true. Nothing is said about global hidden variables.
- bordercases 8y agoWhere could I find out more about these particular kinds of models for QM?
- snowwrestler 8y agoYes, the very next sentence of the abstract says: > Most physicists straightforwardly supplement classical theory with real numbers to which they attribute physical existence, while most physicists reject Bohmian mechanics as supplemented quantum theory, arguing that Bohmian positions have no physical reality. Bohmian mechanics is a hidden variable theory.