Classical probability transformations preserve amplitude and quantum ones preserve |amplitude|^2. That’s not a whole reason, but it’s part of one.
Yes, that’s part of the difference. Quantum transformations are linear in a two-dimensional wave amplitude but preserve a 1-dimensional |amplitude|^2. Classical transformations are linear in one-dimensional probability and preserve 1-dimensional probability.
Classical probability transformations preserve amplitude and quantum ones preserve |amplitude|^2. That’s not a whole reason, but it’s part of one.
Yes, that’s part of the difference. Quantum transformations are linear in a two-dimensional wave amplitude but preserve a 1-dimensional |amplitude|^2. Classical transformations are linear in one-dimensional probability and preserve 1-dimensional probability.
Ah, I get it now, thanks!
(Copenhagen is still wrong though ;)