Hoping you have some answers:

1. Is inflation as in the Big Bang coincident with compactification?
2. Is the compactification of 6 dimensions most likely or could other numbers of dimensions be just as likely?
3. I read that there may have been two inflations in the Big Bang. Is this likely?
4. If 3 is so, and I read of Randell & Sundrum's claim for larger dimensions in Scientific American (i.e., our universe lives on a brane in the larger dimensions), could the first inflation be a compactification that produced the larger dimensions, and the second inflation be a compactification that produced our universe?
5. If 26-d string theory has two time-like dimensions, then is it likely that the first inflation produced the larger 4-d spacetime and the second produced a smaller 4-d spacetime, our universe.
6. If all of the above is likely, then is it likely that the second inflation is coincident with two sets of 6-d compactifications, one which in superstring theory produced fermions, and the other which produced the supersymmetric partners of the fermions?
If all the above is still likely, then I suggest that the (electric-charge) neutral supersymmetric partners possess a different type of charge that acts analogous to electric charge, and that initially in the Big Bang, anti-symmetric partners were produced and recombined just like the anti-fermions did. That implies that dark matter is composed of the supersymmetric particles left over from recombination, but with a mass comparable to fermions
I also propose that in both cases the anti-particle/particle pairs before recombination were connected by threads of the most elementary form of compactified dimensions, and that at recombination these threads precipitated into 3-d space into what are called cosmic axions. If so, then dark matter is composed of both axions and supersymmetric partners, but with axion mass being dominant.
Is there a clue in all this as to what Dark Energy could be?

Richard

• You should mention the numbers - wandaqueen - November 11, 2005 - 10:34 UTC
  • Agreed - yanniru - November 12, 2005 - 11:27 UTC
    • Google inflation.compactification - wandaqueen - November 14, 2005 - 13:29 UTC
      • More recent work on stringy inflation - yanniru - November 14, 2005 - 14:18 UTC
        • The two time dimensions are the key - wandaqueen - November 18, 2005 - 13:14 UTC
          • Two spacetimes cosmology - yanniru - November 20, 2005 - 20:59 UTC
            • How to cancel an infinity - yanniru - November 20, 2005 - 23:49 UTC
• Can't be much help.... - bruce - November 21, 2005 - 05:06 UTC
  • No, not a string idea, but some recent work... - wandaqueen - November 21, 2005 - 12:10 UTC
    • Thanks.. - bruce - November 21, 2005 - 23:28 UTC
      • the Ekpyrotic [string] models and the standard Guth model. - wandaqueen - November 22, 2005 - 14:30 UTC
        • Colliding branes. - bruce - November 23, 2005 - 00:55 UTC
          • Branes do not need to collide - wandaqueen - November 23, 2005 - 13:29 UTC
            • Steinhardts. theories - wandaqueen - November 23, 2005 - 17:51 UTC
            • That's interesting... - bruce - November 23, 2005 - 21:35 UTC