In the Lisa Randell/Sundrum theory, which seems to almost derive from Steinhardt's in that our universe resides on a brane in a larger space along with many other brane univeses, except the branes need not collide. If they happen to, then Steinhardt's theory applies, as I understand it.
So RS is a generalization of Steinhardts.

On this basis, the Guth signature would come from the second inflation. In my mind, and here I depart from Richard, the larger world has always existed. I believe this because in both RS and Steinhardt's cosmology, gravity exists between the branes and from brane to brane.

So gravity has already split from the GUT forces, as Richard claims happens in the first inflation. However, my gut feeling is the universe birth process involves the recreation of the GUT field in a black hole of the mother universe, but not a unified field. I think this is essentially what Bajowald derived in his LQG cosmology. So gravity, the basis of spacetime, is in continuous existence as more and more universes are born on branes. So for each universe there is but one inflation, the Guth inflation. But that means that RS theory may not be falsified from WMAP data.

Does that make sense.

wanda

• Steinhardts. theories - wandaqueen - November 23, 2005 - 17:51 UTC
• That's interesting... - bruce - November 23, 2005 - 21:35 UTC