Re: Variations in the MWI multiverse

Gary Oberbrunner <[email protected]> Thu, 20 Mar 2014 08:18:29 -0400
Newsgroups	gmane.science.physics.fabric-of-reality
Message-ID	<CAFChFygvohCxJkZsAwQXQhVYq0SZTV6GCPFGd0RenpQDgR3k5Q@mail.gmail.com>
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On Tue, Mar 11, 2014 at 12:03 AM, Lee Corbin <[email protected]> wrote:

> It's hard to break the habit many people so often exhibit, of believing
> that
> a quantum experiment must be performed in order to cause a branching to
> occur:
>

I'd be surprised if any MWI physics researcher would make this error. But
I've been surprised before. :-)  _Everything_ is quantum.

Proceeding, following the example of there being approximately as many
> universes with large Neptunes as small Neptunes, and that this holds true
> for each particular Earth, it also follows that when you flip a coin,
> there
> are approximately as many otherwise identical Earths in which heads comes
> up
> as tails. This is so despite the trajectory of any coin leaving your hand
> being classical, for the tiny differences in air currents and tiny initial
> differences in angle or orientation of the coin, the rest of the Earth is
> "orthogonal", that is, in the quantum multiverse there are approximately
> as
> many otherwise identical Earths that have a room with this kind or that
> kind
> of air currents, orientations, etc.
>
> The upshot of all this is that when you flip a classical coin, you still
> find yourself in each kind of universe, the ones showing heads and the
> ones
> showing tails, exactly as if a quantum "split" had occurred.
>

Of course.  This is straightforward MWI.  Every photon emission causes a
split (I prefer differentiation but same point).  It's happening trillions
of times (maybe infinitely many, the jury's still out I believe) in each
second in each cc of space.

In fact by the time the coin lands, a huge number of differentiations have
happened; in about half of them the coin is heads and about half it's
tails.  But note that within each group, they are _not_ identical; just
macroscopically identical.  Individual photons have been reflected off the
surface of the coin in a huge cloud of possibilities (=differentiations),
atomic states have decayed differently, and so on.


-- 
Gary

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      <p><div dir=3D"ltr"><div class=3D"gmail_extra"><br><div class=3D"gmai=
l_quote">On Tue, Mar 11, 2014 at 12:03 AM, Lee Corbin <span dir=3D"ltr">&lt=
;<a href=3D"mailto:[email protected]" target=3D"_blank">leecorbin337@g=
mail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"border-left:1px #ccc solid;"><di=
v>It&#39;s hard to break the habit many people so often exhibit, of believi=
ng that <br>
a quantum experiment must be performed in order to cause a branching to <br=
>
occur:<br></div></blockquote><div><br></div><div>I&#39;d be surprised if an=
y MWI physics researcher would make this error. But I&#39;ve been surprised=
 before. :-) =A0_Everything_ is quantum.</div><div><br></div><blockquote cl=
ass=3D"gmail_quote" style=3D"border-left:1px #ccc solid;">
<div>
Proceeding, following the example of there being approximately as many <br>
universes with large Neptunes as small Neptunes, and that this holds true <=
br>
for each particular Earth, it also follows that when you flip a coin, there=
 <br>
are approximately as many otherwise identical Earths in which heads comes u=
p <br>
as tails. This is so despite the trajectory of any coin leaving your hand <=
br>
being classical, for the tiny differences in air currents and tiny initial =
<br>
differences in angle or orientation of the coin, the rest of the Earth is <=
br>
&quot;orthogonal&quot;, that is, in the quantum multiverse there are approx=
imately as <br>
many otherwise identical Earths that have a room with this kind or that kin=
d <br>
of air currents, orientations, etc.<br>
<br>
The upshot of all this is that when you flip a classical coin, you still <b=
r>
find yourself in each kind of universe, the ones showing heads and the ones=
 <br>
showing tails, exactly as if a quantum &quot;split&quot; had occurred.<br><=
/div></blockquote></div><br>Of course. =A0This is straightforward MWI. =A0E=
very photon emission causes a split (I prefer differentiation but same poin=
t). =A0It&#39;s happening trillions of times (maybe infinitely many, the ju=
ry&#39;s still out I believe) in each second in each cc of space.</div>
<div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra">In fact by =
the time the coin lands, a huge number of differentiations have happened; i=
n about half of them the coin is heads and about half it&#39;s tails. =A0Bu=
t note that within each group, they are _not_ identical; just macroscopical=
ly identical. =A0Individual photons have been reflected off the surface of =
the coin in a huge cloud of possibilities (=3Ddifferentiations), atomic sta=
tes have decayed differently, and so on.<br>
<br clear=3D"all"><div><br></div>-- <br>Gary
</div></div>
</p>

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