Boundary Extents of Multi-Dimensional Universes

[stardust]

I'm not a cosmologist, or even a physicist. I'm trained in civil engineering, but have a profound compassion for astronomy and the cosmos. But...

My question to the board is this. Is it possible that the two ends of the spectrum that define the infinite number of universes some theorize would include our known universe, and that of the exact opposite of what we perceive? That is, the other extent of this spectrum would include a universe comprised almost entirely of mass, and very little space. Like a massive piece of Swiss cheese, where the holes would be where objects with mass are in our universe. Kind like a multi-dimensional negative of the universe we see.

In this opposite universe, gravity is not an attractive force, but a repulsive force. The big bang would have been a big squeeze; black holes would be emitting huge quantities of mass like giant white exploding stars. The sum of all the universes would then be bound on one side by our known universe, and the "negative" of our universe, with an infinite number of "partially" negative universes in-between.

[neutralino]

I'm not a cosmologist, or even a physicist. I'm trained in civil engineering, but have a profound compassion for astronomy and the cosmos. But...

My question to the board is this. Is it possible that the two ends of the spectrum that define the infinite number of universes some theorize would include our known universe, and that of the exact opposite of what we perceive? That is, the other extent of this spectrum would include a universe comprised almost entirely of mass, and very little space. Like a massive piece of Swiss cheese, where the holes would be where objects with mass are in our universe. Kind like a multi-dimensional negative of the universe we see.

In this opposite universe, gravity is not an attractive force, but a repulsive force. The big bang would have been a big squeeze; black holes would be emitting huge quantities of mass like giant white exploding stars. The sum of all the universes would then be bound on one side by our known universe, and the "negative" of our universe, with an infinite number of "partially" negative universes in-between.

It's hard to answer your question properly without knowing which theory of "infinite number of universes" you are talking about. I presume you are talking about the many worlds interpretation of quantum mechanics. If so, then this postulates that any possible outcome of any decision will happen in one "universe" (or, more technically, denies that the wavefunction collapse is objective). Thus, in one world you are a woman; in another you are not born (in fact in infinitely many for both of the above scenarios). Now, I guess this would mean that gravity is repulsive in some universes, but I don't want to guess about things like that, since we do not know how gravity couples with quantum theory.

So, the naive answer to your question is yes, but the more careful answer is maybe not.