- #1
entropy1
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If I consider the MWI, one of the notions for what happens during measurement is that the initial wavefunction, if I use Dirac notation and two dimensions, ##|A\rangle+|B\rangle## undergoes the transformation ##(|A\rangle+|B\rangle)|E_{before}\rangle \rightarrow |A\rangle|E_{after}\rangle+|B\rangle|E_{after}\rangle##. So would it then also be correct that we can include the probability amplitudes, to get for instance this?: ##(a|A\rangle+b|B\rangle)|E_{before}\rangle \rightarrow a|A\rangle|E_{after}\rangle+b|B\rangle|E_{after}\rangle##? It seems to me the latter is not correct, because in MWI there are no amplitudes used. Why is that?