4 ms·

I thought that explaining the Born rule is a problem for every interpretation.

• n4r9 11y ago
  It is for many, but not all. Generally speaking, it's less of an issue for interpretations that give an epistemic role to the wavefunction. Perhaps an extreme example, but in the "QBist" interpretation the wavefunction and Born rule are merely a convenient calculus for the prediction of future interactions with the system. It's not the only way to encode this probabilistic information, but it's nice and compact. The issue is then not "why the Born rule?" but "why this particular set of probabilities over potential outcomes?". Then again, a lot of people find the very idea of epistemic interpretations of quantum theory distasteful, especially in light of the Bell, Kochen-Specker and PBR type inequalities.