On Fri, Sep 27, 2019 at 06:27:16PM -0700, 'Brent Meeker' via Everything List 
wrote:
> 
> When I wrote "lowest" I was assuming the context of MWI...not a single
> universe.  The Bekenstein bound implies that the Hubble volume has an upper
> bound for information capacity of it's surface area in Planck units.  This
> number is around 2.4e106.  So as I read Zurek, he thinks this provides a kind
> of probability cutoff and branches less probable than 0.4e-106 have zero
> probability.   And, more to the point, in the limit of large N, where N is the
> number of degrees of freedom in the environment the off diagonal terms of the
> reduced density matrix go to zero; but this cutoff makes them exactly zero for
> N>2.41e106.  I haven't figured out many branchings it would take to reach this
> number, but with some 1e98 particles it wouldn't take very many.
> 
> Brent

Its an interesting idea, and a plausible mechanism for denying the
"no cul-de-sac conjecture" and quantum immortality.

However, I do have to wonder the significance of a 2.4x10^106 planck
distance quare hubble volume. This surely is a geographical factoid
rather than of fundamental significance.


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Economics, Kingston University         http://www.hpcoders.com.au
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