Posted: May 16, 2017 5:04 pm
newolder wrote:DavidMcC wrote:Randall and Sundrum's theory is the brane-world idea, that universes start in a manner akin to a bumper-to-bumper collision on a packed motorway (which is where they were when they came up with their model). It doesn't seem very natural to me! I much prefer the Lee Smolin idea that universes are black holes as seen from within their own space.
No. You need to (re-)read their paper, it's based on a model with 4 space + 1 time dimensions. (Whether the 4th space dimension is infinite in extent or bounded is part of the model's development in later work.)
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I was referring to their own words about how the idea came to them in a motorway traffic jam! Of course, they don't mention that in published papers, but certainly did in a TV interview - it was their words, not the journalist's.