Variations in the MWI multiverse
"Lee Corbin" <[email protected]> Sat, 22 Feb 2014 22:08:04 -0800
| Newsgroups | gmane.science.physics.fabric-of-reality |
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Consider the set, across the multiverse according to MWI, of solar systems
essentially similar to ours. This set is much vaster (or, perhaps, we should
say, has greater measure or frequency) than the GIU (Group of Identical
Universes) exactly identical to ours. Our own GIU in which we hear
disturbing reports from Ukraine, and in which we perform or can perform
quantum mechanical experiments with specified outcomes, and in which I am
writing and you are later reading this email, is a tiny fraction of this
larger set. This larger set includes solar systems, I'm positing, that have
eight planets also, but which differ in details concerning the planets.
This entire group of 8-planet solar system parallel universes will include a
subset in which Neptune is about half the size of Uranus. Do we have any a
priori reason to suspect that the fraction of solar system parallel
universes containing this half-size Neptune is any less probable than our
own? Eventually, of course, something may indeed be proved regarding Bode's
law that could inflict such a reduction on those; on the other hand,
further progress in celestial mechanics might easily show that half-size
Neptune solar systems are actually more likely to form than our "full size"
(greater than 1/2 Uranus radius Neptune) solar systems.
Within each such collection of half-size Neptune solar systems, what
possible configurations for the Earth are thereby implied, or restricted?
None, so far as I have been able to see. Everything that we know about the
Earth--shall we exclude, say, its approximate mass and distance from the
sun, as part of my initial specification--might just as well have occurred
(did occur, is occurring!) in that collection. For, so vast is the MWI
multiverse, it's difficult to suggest that configurations in which, say, the
continents of North America and South America are quite separate, are any
less frequent than our own, in which the two continents are linked by an
isthmus.
(It may amuse the reader that until I added that last specification
regarding the linkage of the two continents, this very email was being
written most likely just as often on Earths in which there is a sizeable sea
passage between them--but that single qualifier significantly reduced the
number of people (or I should say their measure) reading this, but obviously
didn't exclude you.)
Yes, we do know that a *change* in Neptune's orbit, one, say that occurred
as a result of a large asteroid collision millions of years ago, will be
chaotically linked by classical physics to what is happening now on Earth.
But such considerations seem to me to underrate the vastness of the
multiverse as specified so far in this message. Because, for each variation
in Neptune's orbit thus described, there will still be an uncountable set of
them in which this letter continues in its same form, and what you had for
breakfast remains the same.
Before pressing on with the subject, I would like to know if anyone objects
to any of the above reasoning.
thanks,
Lee Corbin
--RPel5fUchY8rgRgzaMVZxRO-9MEWbPk761lwA5S
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<p>Consider the set, across the multiverse according to MWI, of solar systems <br>
essentially similar to ours. This set is much vaster (or, perhaps, we should <br>
say, has greater measure or frequency) than the GIU (Group of Identical <br>
Universes) exactly identical to ours. Our own GIU in which we hear <br>
disturbing reports from Ukraine, and in which we perform or can perform <br>
quantum mechanical experiments with specified outcomes, and in which I am <br>
writing and you are later reading this email, is a tiny fraction of this <br>
larger set. This larger set includes solar systems, I'm positing, that have <br>
eight planets also, but which differ in details concerning the planets.<br>
<br>
This entire group of 8-planet solar system parallel universes will include a <br>
subset in which Neptune is about half the size of Uranus. Do we have any a <br>
priori reason to suspect that the fraction of solar system parallel <br>
universes containing this half-size Neptune is any less probable than our <br>
own? Eventually, of course, something may indeed be proved regarding Bode's <br>
law that could inflict such a reduction on those; on the other hand, <br>
further progress in celestial mechanics might easily show that half-size <br>
Neptune solar systems are actually more likely to form than our "full size" <br>
(greater than 1/2 Uranus radius Neptune) solar systems.<br>
<br>
Within each such collection of half-size Neptune solar systems, what <br>
possible configurations for the Earth are thereby implied, or restricted? <br>
None, so far as I have been able to see. Everything that we know about the <br>
Earth--shall we exclude, say, its approximate mass and distance from the <br>
sun, as part of my initial specification--might just as well have occurred <br>
(did occur, is occurring!) in that collection. For, so vast is the MWI <br>
multiverse, it's difficult to suggest that configurations in which, say, the <br>
continents of North America and South America are quite separate, are any <br>
less frequent than our own, in which the two continents are linked by an <br>
isthmus.<br>
<br>
(It may amuse the reader that until I added that last specification <br>
regarding the linkage of the two continents, this very email was being <br>
written most likely just as often on Earths in which there is a sizeable sea <br>
passage between them--but that single qualifier significantly reduced the <br>
number of people (or I should say their measure) reading this, but obviously <br>
didn't exclude you.)<br>
<br>
Yes, we do know that a *change* in Neptune's orbit, one, say that occurred <br>
as a result of a large asteroid collision millions of years ago, will be <br>
chaotically linked by classical physics to what is happening now on Earth. <br>
But such considerations seem to me to underrate the vastness of the <br>
multiverse as specified so far in this message. Because, for each variation <br>
in Neptune's orbit thus described, there will still be an uncountable set of <br>
them in which this letter continues in its same form, and what you had for <br>
breakfast remains the same.<br>
<br>
Before pressing on with the subject, I would like to know if anyone objects <br>
to any of the above reasoning.<br>
<br>
thanks,<br>
Lee Corbin<br>
<br>
</p>
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