RE: ASSA and Many-Worlds

From: Stathis Papaioannou <>
Date: Mon, 29 Jan 2007 11:48:52 +1100

Brent Meeker writes (quoting Jason Resch):
> > If many-worlds is true, consider for a second how many histories> > lines (and copies of you) must have been created by now. The > > universe had been branching into untold numbers of copies, untold > > numbers of times each second, for billions of years before you were > > born. While not every branch contains you, once you appeared in one> > history line, a new copy of you has been created for every possible> > outcome of every quantum event that happens anywhere in this> > universe. > > I don't think this is the way to look at it. It's true that QM predicts an uncountably infinite number of branchings, even for an universe containing only a single unstable particle. But these branchings don't produce different copies of Stathis. As a big macroscopic object he is described by a reduced density matrix that has only extremely tiny off-diagonal terms. So he is a stable entity against these microscopic quantum events unless they are amplified so as to change his macroscopic state - as for example if he heard a geiger counter click. The microscopic events just add a little fuzz to his reduced density matrix - and the same for all of the classical world.> > You might be interested in Greg Egan's excellent SF story "Singleton" which is available online:> > ttp://> > Egan says "People who professed belief in the MWI never seemed to want to take it seriously, let alone personally." So he wrote a story in which it is taken personally.> > Brent Meeker
Doesn't "a little fuzz" in an infinite number of branchings result in every possibility actually manifesting an infinite number of times?
Stathis Papaioannou
Live Search: New search found
You received this message because you are subscribed to the Google Groups "Everything List" group.
To post to this group, send email to
To unsubscribe from this group, send email to
For more options, visit this group at
Received on Sun Jan 28 2007 - 19:49:15 PST

This archive was generated by hypermail 2.3.0 : Fri Feb 16 2018 - 13:20:13 PST