> S. Atkins wrote:
> 
> > I have been asked to forward this message from an anonymous poster.
> > 
> > **********************Is the world real?
> > 
> > Theoretical physicists have developed a parallel universe hypothesis to
> > account for the various ghostlike, unexplainable effects resulting from
> > Heisenberg's uncertainty principle.  This hypothesis stems from the need
> > to
> > give Heisenberg's quantum mechanics a physical expression.  Hence, a
> > system
> > of parallel worlds.  These worlds would be alternative dimensions
> > superimposed upon our own in which every single potential condition
> > contained in quantum mechanics actually existed.  This model of reality,
> > if
> > confirmed, might help us form an image of Heisenberg's mathematically
> > abstract atom.
> 
> Wouldn't this theory mean that matter does not exist as a "solid" if you
> understand what I mean?  It's a difficult thing to explain, but I'll
> have a go.  Matter exists, so we are told :), as an actual presence in
> space, that is rigid at it's basic form (ie molecular level) and there 
> is something that can be "touched" present.  If MWH is correct, then 
> surely this matter theory is incorrect, as presumably matter exists
> unconditionally.  It would be, in my mind, impossible to have multiple
> Universes Co-existing with our own in the same part of space, due to the 
> fact that if matter is "solid" then *all* Universes matter would be in the
> same parts of space as in the other dimensions.  Does that make sense?
> This would result in us being able, quite easily - by touch alone - to
> detect the presence of other universes.  Presumably the other "you" is
> just as real in that dimension as in this, so why can we not see him if
> matter is real, and he co-exists in the same space, but another dimension
> (what definition would "dimension" take in this case?)?
I would suggest as many spatial dimensions as the real numbers, *all* 
perpendicular to our space-time.  That may not be enough: I would hope 
that as many as all functions from real numbers to real numbers would be 
sufficient.
> The only way I can see this theory being possible is by matter actually being
> made up of Photons, and thus no more "solid" than light.  If a Photonic basis
> is what matter is built from, then maybe different wavelengths/frequencies
> interact well with eachother, to produce our universe, and other combination
> produce other universes.  In this way, "matter" could be present, but we would
> be unable to see or touch it.
> 
> Appologies for the somewhat fuzzy explanation.  I hope that someone can see
> what I'm getting at.  Please feel free to interpret what I've said in a 
> better way.
> 
> > 
> > According to the parallel universe hypothesis, there is only one
> > universe at
> > the beginning of time, but each atomic event causes it to split off into
> > two
> > or more parallel dimensions, so that we soon have a continuous branching
> > pattern like in a hierarchical communications network or a tree. 
> 
> What is an atomic event classed as?  Is it something fairly major, or is it
> something as simple as decision making?
It's fairly small-scale.  Actually, some interpretations of Quantum 
Mechanics seem to exclude decision-making from the domain of study.
At this level of resolution, you should imagine your body as experiencing 
much more than 6.023*10^26 atomic events per second [yes, I whipped 
Avogadro's constant out: 1 event/mol/second (*way* too slow!)]