The early Kaluza-Klein model is one where the use of 5-d instead of the usual 4-d GR dimensions allowed EM theory to be incorporated in the 5th dimension. It really was just a 5x5 matrix with EM components in the 5th row and column.

The above paper by Chris Quigg, which I have printed out and read, reviews current work which goes way beyond the K-K model.

The tiny balls you speak of is how 10-d develops into 4-d by means of compactification where 6 dimensions curl up into Planck size balls. In this process, I am not sure if it happens by way of symmetry breaking, gravity goes with the 4 expanding dimensions.

In the most advanced work gravity is thought to be able to migrate off the 4-d plane into a fifth dimension whereas all other forces are confined to 4-d.

Hope this helps,

Richard

• More help! - budbock - July 17, 2003 - 17:40 UTC
  • Sorry for the late reply - yanniru - August 20, 2003 - 12:11 UTC
    • Why no ETHER? - budbock - August 30, 2003 - 02:41 UTC
      • Ether may be Dark Matter - yanniru - October 8, 2003 - 11:14 UTC