--- On Wed, 2/11/09, Brent Meeker <meekerdb.domain.name.hidden> wrote:
> >> Two copies don't increase the measure of a computation and reducing it's vector in Hilbert space doesn't diminish it.
> >
> > If that is so then how do you explain the Born rule?
>
> The Born rule assumes you start with a normalized vector (i.e. ray), so it calculates predicted probabilities conditional on the state preparation. After each measurement, the vector is renormalized because the prediction is always conditional on the present state.
How do you explain why it works? I say it is because people in higher amplitude branches have more measure.
> This is quite different from applying a probability measure to the evolution of a multiverse in which decoherence defines many different orthogonal subspaces, each of which gets a small projection of the state vector of the multiverse.
Then it is not the standard MWI in the Everett tradition.
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Received on Sat Feb 14 2009 - 11:51:43 PST