Evidence of other universes
From PhiloWiki
If there is a multiverse, is there evidence of other universes?
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Christian view
- Strobel states that the multiverse does not exist because we do not see evidence of other universes [Case for a Creator, p 107].
- Resources are needed. Feel free to find and add resources.
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Secular view
- "[There is no evidence of other universes], because our universe according to general relativity represents everything that emerged from our Big Bang, and includes galaxies and space beyond our visible universe. Other universes represent completely different space-times that are outside our own spacetime completely. They do not now, or ever will in the future, have any physical contact with ours, and are thoroughly beyond observation even when the universe we are in becomes infinite after an eternity of time. These universes are literally on the other side of eternity and infinity from our perspective!"
- "If inflation is correct, the universe really is more than a million trillion trillion trillion times larger than the already enormous visible cosmos. It's practically infinite in scale. You have to speak like a child to convey the idea—it's basically a gazillion times larger than we thought. And there's more: One variation of the inflation theory suggests that our universe is a calm bubble, a kind of 'no inflation zone' within an infinitely large, chaotic, eternally inflating 'multiverse,' and that this multiverse contains countless bubble universes, some of which almost surely contain intelligent observers trying to make sense of their own crazy cosmos."
- "A generic prediction of inflation is that the thermalized region we inhabit is spatially infinite. Thus, it contains an infinite number of regions of the same size as our observable universe, which we shall denote as $\O$-regions. We argue that the number of possible histories which may take place inside of an $\O$-region, from the time of recombination up to the present time, is finite. Hence, there are an infinite number of $\O$-regions with identical histories up to the present, but which need not be identical in the future. Moreover, all histories which are not forbidden by conservation laws will occur in a finite fraction of all $\O$-regions. The ensemble of $\O$-regions is reminiscent of the ensemble of universes in the many-world picture of quantum mechanics. An important difference, however, is that other $\O$-regions are unquestionably real."
