In a recent headline scientists are now hopeful that a new experiment happening at a large collider may give them a glimpse into a parallel universe. The story is at: http://secondnexus.com/technology-and-innovation/large-hadron-collider-scientists-hope-make-contact-parallel-universe
Multidimensional theories of self-generating universes (and theories of self-generating life) are at this point not science but philosophy attached to science. For example, the theoretical work of Hawking is entirely philosophical, not scientific, in so far as it proposes things beyond science and beyond detection or proof. Hawking’s work is also philosophical in that it arbitrarily projects a single religious world view – blind-faith Metaphysical Naturalism – onto evidence and facts which could equally (and arguably better) be considered support for Design. It is also philosophical because it deals with singularities – events which only occur once and can therefore only be directly (scientifically) understood in terms of evidential proof and historical proof. We have only ever observed a single universe, appearing to be governed by principles of relativity and finely tuned to support the existence of stars, galaxies and life.
What scientists are doing in making a prediction of observing parallel universes would be directly analogous to proposing in 1977 that if Pluto had a moon it would be proof of the existence of green unicorns, and then when Charon was proven to exist in 1978 saying, “Hah, we were right! Green unicorns do exist!”
There’s definitely more we need to understand about the quantum world of physics but I tend to reject the basic Copenhagen “spooky” view of matter because that view still has it’s roots in belief about measuring equipment and not about matter itself. Obviously particles interact at a distance but the mechanism is entirely unknown at this point. And string theory up to this point has really just amounted to a bunch of conflicting hearsay, as any honest quantum physicist will tell you.
The bottom line is that part of the reason many modern quantum physicists want to have blind faith in alternate universes is because they desperately want the findings in their field to match their Socialist, Metaphysical Naturalist intellectual ideology.
And the findings simply don’t.