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Forgive the title if improper, the language of QM is not my native tongue. :)
All scenarios where QM is invoked that I am used to involve parameters that do not commute, but I suppose I've never truly asked myself if QM is necessary to describe scenarios wherein you are not concerned with this. If we were only ever concerned with commuting variables, would we ever need step outside the bounds of the classical? Or even more simply, if we were only ever concerned with one observable (i.e. spin on one axis, or charge) in entangled systems, even in some unusual setup, would we ever need QM to predict the results? Under this (admittedly silly) form of ignorance, would we still always expect a local realist world?
I understand, of course, we are concerned with these measurements contrary to the above. I pose this hypothetical simply as a means to check my own understanding.
Thanks
All scenarios where QM is invoked that I am used to involve parameters that do not commute, but I suppose I've never truly asked myself if QM is necessary to describe scenarios wherein you are not concerned with this. If we were only ever concerned with commuting variables, would we ever need step outside the bounds of the classical? Or even more simply, if we were only ever concerned with one observable (i.e. spin on one axis, or charge) in entangled systems, even in some unusual setup, would we ever need QM to predict the results? Under this (admittedly silly) form of ignorance, would we still always expect a local realist world?
I understand, of course, we are concerned with these measurements contrary to the above. I pose this hypothetical simply as a means to check my own understanding.
Thanks
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