Problems with M-theory?
I am not the only one who has wrestled with M-theory, its limited acceptance in the community, and its seemingly inevitable discredit. However, let's not dump it quite yet: Bars and Svetcos raise an essential point considering de-Sitter Space and its mass equivalency to Anti de-Sitter Space.
Might we find a way to unify M and P theories without resorting to >11 dimensions?
I thot that it was only half a theory; it should be M&M theory. But the Google came to the rescue-
In theoretical physics, M-theory is an extension of string theory in which 11 dimensions are identified. Because the dimensionality exceeds that of superstring theories in 10 dimensions, proponents believe that the 11-dimensional theory unites all five string theories (and supersedes them). Though a full description of the theory is not known, the low-entropy dynamics are known to be supergravity interacting with 2- and 5-dimensional membranes.
OR DID IT?
Ain't nuttin' that beer cain't fix!
I used to spend a fair amount of time here. I ultimately quit doing this because of the changes wrought by AOL and the quality of questions. I really had no idea about this one until I ran it thru the search engine.
Stuff like this has always fascinated me. I recently purchased a copy of Black Holes and Time Warps by Thorne, but I have little expectations of being able to plow thru it, altho I made it thru Hawking's primer.
It has been my experience; and I was here when this was Yedda, so I do have a few years under my belt, that questions like this don't get appropriate answers- as evidenced by my friend Bubba's response. I hope that you find some intelligent responses.
M-theory proposes 10 spatial dimensions and one time dimension yet we find that the dynamicity of time causes time to present as at least two dimensions. Think of a highway where you wish to pass a slow-moving motorist.
The slower moving motorist is passing through space at one rate and the faster moving motorist is passing through space at a faster rate. As such the faster of the two experiences an increase in energy as expressed by I=MV^2/2. The greater the kinetic energy, the slower time appears to pass creating a TIME DIFFERENTIAL.
At highway speeds the difference in a vehicle is negligible, however as we accelerate particles to relativistic speed the difference becomes quite pronounced. For example, muons should only last 10^-137 second, yet as they travel through space at the Upper Einstein Shock Boundary (.98C) time slows enough for them to survive quite some time.
We know very little about time. It is the unexplored dimension.
Other people asked questions on similar topics, check out the answers they received:
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them