Hiding in the Mirror, Lawrence Krauss
At http://www.math.columbia.edu/~woit/blog/, Dr Peter Woit comments: 'I’ve just finished reading Lawrence Krauss’s new book Hiding in the Mirror: The Mysterious Allure of Extra Dimensions, from Plato to String Theory and Beyond, and it’s very, very good.'
Plato fooled me! See http://eskesthai.blogspot.com/2005/08/fifth-dimension-is-spacetime-fabric.html . It appears Plato and Dr Gerard t'Hooft are as alike as Dr Jekyl and Mr Hyde.
I wanted a way for a spacetime fabric to give light speed gravity force and seized on Plato's idea: "The Fifth Dimension, is the Spacetime Fabric. Perhaps Quantum Gravity can be Handled by thoroughly reconsidering Quantum Mechanics itself? by Gerard t' Hooft. I was attracted to Nigel Cook's statement on Peter Woits blog..."
Notice the vanity, because I'm mentioned personally, I automatically lower my guard a bit. Is the 5th dimension really the spacetime fabric? I use it at http://nigelcook0.tripod.com/ as just a vague explanation of the speed of gravity pressure. It doesn't appear in the calculations at all.
So we don't need the 5th dimension? http://www.math.columbia.edu/~woit/wordpress/?p=280#comment-5478 :
As for QM and QFT, we know the fabric of space is filled with virtual particles. Normally particles like gas molecules can't carry transverse waves, only a solid normally allows transverse waves. But suppose the virtual particles have a spin, like real ones? Then you get transverse waves. Dr John Baez has some ideas on this for quantum gravity here http://math.ucr.edu/home/baez/loops05/ which seem to account for the light speed of gravity while preserving a pressure mechanism.
My understanding is that this is reinventing the wheel, since Maxwell's 1873 Treatise section 822-3:
"The ... action of magnetism on polarised light [discovered by Faraday not Maxwell] leads ... to the conclusion that in a medium ... is something belonging to the mathematical class as an angular velocity ... This ... cannot be that of any portion of the medium of sensible dimensions rotating as a whole. We must therefore conceive the rotation to be that of very small portions of the medium, each rotating on its own axis... The displacements of the medium, during the propagation of light, will produce a disturbance of the vortices ... We shall therefore assume that the variation of vortices caused by the displacement of the medium is subject to the same conditions which Helmholtz, in his great memoir on Vortex-motion, has shewn to regulate the variation of the vortices of a perfect fluid."
So I may have been hiding in the mirror for a bit myself, because of Plato!