MTheory is not really my favorite subject in physics, but I believe the string theories all came about due to trying to unify gravity with the Standard Model (which already acounts for many of the smaller particles).
The "official" webste for string theory:
The Official String Theory Web Site
When the Large Hadron Collider starts giving us data, there is hope that we will get data relavent to the Standard Model, and perhaps the string theories and other such things.
EDIT:By "we" I mean the human racenot that I have anything to do with it.
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Thread: Quantum weirdness

09032008, 04:25 PM #31
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"As our island of knowledge grows, so does the shore of our ignorance." John Wheeler
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09032008, 04:35 PM #32

09032008, 11:21 PM #33
kets and braslearn'em, love'em, and don't throwup when you read quantum mechanics
Accept the past. Live for the present. Look forward to the future.
Robot Fusion
"As our island of knowledge grows, so does the shore of our ignorance." John Wheeler
"[A] scientist looking at nonscientific problems is just as dumb as the next guy." Richard Feynman
"[P]etabytes of [] data is not the same thing as understanding emergent mechanisms and structures." Jim Crutchfield

09042008, 01:07 AM #34

09292008, 05:37 PM #35
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10012008, 03:25 PM #36
OK. I now have enough interest in Mtheory and the string theories, that I want to learn the Math (otherwise I'll continue to think of it as B.S).
Does anyone know good sources?
Accept the past. Live for the present. Look forward to the future.
Robot Fusion
"As our island of knowledge grows, so does the shore of our ignorance." John Wheeler
"[A] scientist looking at nonscientific problems is just as dumb as the next guy." Richard Feynman
"[P]etabytes of [] data is not the same thing as understanding emergent mechanisms and structures." Jim Crutchfield

11282008, 04:18 AM #37
I watched the videos too. Those sensationalised documentaries always make me skeptical.
So is MTheory still around, does it promise much, and can anyone give a good clear basis of the mathematics and perceived reality of what the theory means?
I hear opinions either way all the time, and I know there is obvious unexplained order in the standard model and the need to provide connection between various scientific theories, but are these new theories based on thought experiments that run close to known reality, or a mathematical attempt to find a formula that fits all known reality?
ie. is it maths based or science based? Just remembering things like Einstein's best work were theoretical physics and based mainly on concepts built from anomalies in experiments. Not a mathematical search for a God formula.
An interesting thought on this topic also is what does a God Formula mean? Does it solve everything, or give us an idea of where to look next. Say for example you had the God Formula and wanted to model the weather. This doesn't sound too hard, you have the God Formula. You get the maximum amount of information you can get for every particle on Earth at a set time and start the modelling system. Even if all the original information was accurate and could be measured simultaneously, you'd get done by Heisenberg's and wouldn't know where any particle is a microsecond later. Five seconds later, you will know so little about the system, that the original idea was pointless.
Or say something like turbulence. We have the NavierStokes equation. It models it. So do we have the answers? Not really. Or quantum mechanics. We have Schrodinger's wave equation. Now take a 1000 particle system and model it... I can't think what an 11 dimensional equation is going to be like to find any solutions for with a complex system.Freude, schÃ¶ner GÃ¶tterfunken Tochter aus Elysium, Wir betreten feuertrunken, Himmlische, dein Heiligtum! Deine Zauber binden wieder Was die Mode streng geteilt; Alle Menschen werden BrÃ¼der, Wo dein sanfter FlÃ¼gel weilt.

09012009, 04:39 AM #38
The video link is broken: I found it again here: Physics Video Archive SidneyColeman_QMIYF
Accept the past. Live for the present. Look forward to the future.
Robot Fusion
"As our island of knowledge grows, so does the shore of our ignorance." John Wheeler
"[A] scientist looking at nonscientific problems is just as dumb as the next guy." Richard Feynman
"[P]etabytes of [] data is not the same thing as understanding emergent mechanisms and structures." Jim Crutchfield

09012009, 10:13 AM #39
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Here's a nice thing about Mtheory aswell. Even with pictures that's how I like it . Sadly there is no math in it.
http://www.nikhef.nl/pub/services/bi...am14395569.pdf
If you find sources on some model equations concerning the theory, I'ld be happy if you could share em

09012009, 10:59 AM #40
Interesting article
Recently Thomas Banks and Stephen H. Shenker of Rutgers University, together with Willy Fischler of the University of Texas and Leonard Susskind of Stanford University, have proposed a rigorous definition of Mtheory. Their “matrix” theory is based on an infinite number of zerobranes (particles, that is).
The coordinates, or positions, of these particles, instead of being ordinary numbers,
are matrices that do not commute—that is, xy does not equal yx. In this picture spacetime itself is a fuzzy concept in which the coordinates cannot be defined as the usual numbers but instead as matrices.APS Profile: Inclusion: e/w=1/6 (Supine) Control: e/w=7/3 (Choleric) Affection: e/w=1/9 (Supine)
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