I posted this response here and on Rafael Castel's blog site (topic # 835):
Dear Rafael,
You asked:
"Considering the idea of the Multiverse - what do we have in the spaces between the myriad of universes of the multiverse? Do we have quantum Gravitons there?"
I think that the Multiverse is an infinite Cantor set - hollow but not empty - with self-similar scales. The phase transition that caused Inflation could have caused other scales of inflation. The speed of light scale limit limits us to seeing objects within 13.7 billion light years of our location, but what if more exists and we cannot see it because it expanded faster than the speed of light (with a scale of greater complexergy)? I think that quantum gravitions can exist at the Multiverse scale because of its greater complexergy, but cannot exist (abundantly - yes there may be some ridiculusly small fraction like 10^(-123)) at our Classical scale because of our lesser complexergy. The "space" between our Observable Universe and the Multiverse is separated by the speed of light scale limit, and may collapse into an effective "boundary" that provides the Holographic Principle.
You also asked:
"Do we have a Multiverse composed of relatively similar universes? In other words, do we have homogeniety at the level of universes?"
Yes - our Multiverse is comprised of self-similar scales. I'm not sure I would call this homogeneity, but similar patterns would appear at every scale.
You also asked:
"Or would you say there are clusters of universes, clusters of clusters of universes, superclusters of universes, clusters of superclusters of universes, and so on?"
Certainly Super Clusters of Galaxies exist within our Observable Universe. Perhaps "clusters" and "voids" are part of the pattern that we should expect at every scale.
You also asked:
"And finally, at what level do you see any possible decoupling of components according to the scale limits?"
I think we have maximal simplicity at the sub-Quantum scale, and maximal complexity at the super-Cosmic scale. All of these extremes are relevant to a TOE.
You said:
"Ray, I must let you know - I find the articulation of a Multiverse rather superfluous, since I am inclined to believe in an infinite hierarchical cosmos and in spite of the idea of perhaps the 'decoupling' at the very large scale."
Rafael - I agree with Nottale that at least 4 scales must exist. I think that most of us would admit to a Classical and Quantum scale. Additionally, a sub-quantum scale explains the Planck scale limit. And a super-classical scale explains the speed of light limit. I have proposed one more scale to complete the analogy with Particle Physics expectations of fundamental particles with spins of (0, 1/2, 1, 3/2, 2). Regardless of whether we have 4 or 5 scales, we must have at least one scale beyond the speed of light. I prefer to call the largest scale the "Multiverse", but I realize that term carries its own baggage. I don't like the idea of the common "multiverse" whereby these hierarchal numbers are part of a random number generator, but rather prefer the idea of a "Multiverse" whereby complergy content of the various scales necessitates these hierarchal numbers.
I hope I answered your questions thoroughly. We are using slighly different terminolgy and language, but I think that we are on self-similar pages.
Have Fun!
Dr. Cosmic Ray