After reading Mott’s paper
The wave mechanics of α-ray tracks
Mott N.F., Proc. R. Soc. Lond. A, 126, 79-84, 1929.
my simple question is why this kind of reasoning isn’t sufficient to show that any kind of quantum state reduction (projection postulate, collapse of the wave function) is unnecessary.
Of course this does not rule out the idea to use the quantum state reduction as a tool in some calculations, but as presented in some books and lecture notes it seems that the quantum state reduction ist still believed to be an essential, indispensable postulate for quantum mechanics.
(of course I know that there are non-collapse interpretations; to my knowledge they haven’t been ruled out experimentally but agree with observations)