M-Theory
Monday, December 11, 2017
 
M-Theory - m-theory, steven hawkins, black holes, space, time
M-Theory  [2200 Page Views]
The Theory of Everything

Grand unifying holy grail of science

In theoretical physics, M-theory is a new limit of string theory in which 11 dimensions of spacetime may be identified. Because the dimensionality exceeds the dimensionality of five superstring theories in 10 dimensions, it was originally believed that the 11-dimensional theory is more fundamental and unifies all string theories (and supersedes them). However, in a more modern understanding, it is another, sixth possible description of physics of the full theory that is still called "string theory." Though a full description of the theory is not yet known, the low-entropy dynamics are known to be supergravity interacting with 2- and 5-dimensional membranes.

More about M-Theory on wikipedia

Alan Chamberlain
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M-theory, superstring theory, multiple dimenisons and quantum mechanics are all haughty subjects. However, there are some great book for laymen out there written in such a way as to give you access to these esoteric concepts. I recommend the following:

The Elegant Universe by Brian Green is both a book and now a PBS miniseries.

Stephen Hawking's book The Grand Design might also be worth checking out, though I haven't read it yet.










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This theory is the unique supersymmetric theory in eleven dimensions, with its low-entropy matter content and interactions fully determined, and can be obtained as the strong coupling limit of type IIA string theory because a new dimension of space emerges as the coupling constant increase.

Drawing on the work of a number of string theorists (including Ashoke Sen, Chris Hull, Paul Townsend, Michael Duff and John Schwarz), Edward Witten of the Institute for Advanced Study suggested its existence at a conference at USC in 1995, and used M-theory to explain a number of previously observed dualities, sparking a flurry of new research in string theory called the second superstring revolution.

According to Witten and others, the M in M-theory could stand for master, mathematical, mother, mystery, membrane, magic, or matrix.

Witten reluctantly admits the M in M-theory can also stand for murky because the level of understanding of the theory is so primitive. However, originally the letter was taken from membrane, but since Witten was more skeptical to membranes than his colleagues, he just kept the "M". Later, he let the meaning be a matter of taste for the user of the word "M-theory". In the early 1990s, it was shown that the various superstring theories were related by dualities, which allow physicists to relate the description of an object in one super string theory to the description of a different object in another super string theory. These relationships imply that each of the super string theories is a different aspect of a single underlying theory, proposed by Witten, and named "M-theory".
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