--- On Wed, 2/11/09, Brent Meeker <meeke...@dslextreme.com> 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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