Re: Curved space
- From: "Sam" <sam@xxxxxxxxxx>
- Date: Tue, 15 Aug 2006 02:47:15 GMT
"DougC" <prigator@xxxxxxx> wrote in message
news:1155598599.780532.81790@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
look
Sam wrote:
As tricky as trying to imagine curved 4 dimensional space-time, if you
theinto the latest varients of string theory that resulted when it and
super-gravity theories were combined, which now appears to be the most
promising attempt to merge the world of the big (relativity/gravity) to
theworld of the small (quantum mechanics), it shows how the universe is
actually made up of 11 dimensions and not 4. Try to imagine that! Also
havelatest thing is now "M-Theory", which is the first theory that seems to
a chance at explaining what the big bang was.
Well done and enjoyable reading. One question: Does the 11 dimensions
theory include additional time dimension(s)?
Fun stuff.
Yes, it is.
Doug Chandler
I'm almost certain time is among the 11 total.
In the 80s when super string theory emerged into it's heyday, there arose
several competing variants, 5 major ones if I remember right. It was a bad
situation for it for a while. At that time it was all based on a model with
10 total dimensions.
Super-gravity was a competing model which didn't recieve much attention
because the fad was superstrings. It however was was based on 11
dimensions.
The camps were essentially split until someone had had the notion to try an
extra dimension with superstrings and in doing so discovered the multiple
solutions were just variations of the same thing. The strings that compose
the fabric of the universe and manifest themselves as all the different
types of elementry particles went from open ended strings to closed loops
and inherited all sorts of weird properties.
M-Theory is pretty cool. It defines the spatial dimensions of our universe
as exsting as "membranes" in some higher order related to the extra
dimensions from superstrings. It borrows ideas from super-gravity
concerning why the gravity appears to weak relative to the other known
three, implying that it may either be "leaking" into the other dimensions,
or manifest itself primarily in the others in the first place, and what we
see is what leaked back in. It also introduces the concept of parallel
universes and the notion of universes where with completely different laws
of physics, or unstable ones that burst into and out of existance in
"M-Space". It hypothesizes that these universes are created by these
membranes predicted by super-strings, and that the big bang was one such
collision.
.
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