JGWeissman comments on Scott Aaronson on Born Probabilities - Less Wrong

32 Post author: Wei_Dai 02 October 2009 06:40AM

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Comment author: cousin_it 02 October 2009 02:05:53PM 0 points [-]

So, this

There, the probability of ending up in any branch depends only on the final amplitude of that branch, not on the order in which branching occurred.

combined with this

Note that in quantum mechanics, the evolution of a wavefunction always preserves its 2-norm

implies the Born rule?

Comment author: JGWeissman 02 October 2009 06:58:10PM 1 point [-]

The conclusion also needs that what happens in one branch can't renormalize the probability of another branch.