Lecture 10 | String Theory and M-Theory
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(November 30, 2010) Professor Leonard Susskind continues his discussion on T-Duality; explains the theory of D-Branes; models QFT and QCD; and introduces the application of electromagnetism. String theory (with its close relative, M-theory) is the basis for the most ambitious theories of the physical world. It has profoundly influenced our understanding of gravity, cosmology, and particle physics. In this course we will develop the basic theoretical and mathematical ideas, including the string-theoretic origin of gravity, the theory of extra dimensions of space, the connection between strings and black holes, the "landscape" of string theory, and the holographic principle. This course was originally presented in Stanford's Continuing Studies program. Stanford University: http://www.stanford.edu/ Stanford Continuing Studies Program: http://csp.stanford.edu/ Stanford University Channel on YouTube: http://www.youtube.com/stanford
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so around 6k people just like me wanted to know how many actually finished it . Anyone?
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Question for your brilliant selves from an average guy: Does dark matter exhibit any elastic like properties?
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From what prof. said you can't have D-branes higher than 6, for 3 dimensions are ordinary noncompactified space and strings are allowed to move freely along these directions. I guess.
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No puns in this one INCIDENTALLY.
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Truely amazing lecture series. I love every bit of it.
If I could suggest anything, consider this:
A 3 brane with holes in it. Something like a 3 d fishing net (mostly empty space). Color it red. Another (blue) 3 brane just like the red one but interleaved through out. Every vertex of the red brane connects through a string to the nearest vertex of the blue brane. Some springs or spongy material (the matmoss) between the branes provides a bit of pressure. Some rules apply to allow a small bit of motion.If a cosmic ray strikes a string or a node then a wave may travel in 2 opposite directions, twisting a red string around a blue one. (translation rules, etc) As the two twists travel far apart each maintains its twist in the two fields (which is why there MUST be two (or more)) branes here.) The twists provide opposite forces (charges) which will be attracted to each other. Also each twist provides a new deformation in the 2 fields which though weak, acts exactly like gravity (there's your "5th" dimension compaction).... more?--David A. Elm -
I want to know what cookies he eats. I went on a cookie eating rampage after watching these lectures.
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Could we not have two dimensions of time, with different orientations? One going left, another right or one going clockwise and another anti-clockwise or one going forward and another going backward?
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I am sure that I can give a lecture and saying what ever I want, and the audiance saying woow. Have you ever read about the "Emperor's New Clothes?" by HC Andersen?
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What would the D-brane model of a hydrogen atom look like?
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What the difference between D-Branes with photons and D-Branes with gluons, are they not both the same D3-Branes
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no time no space ? what i presume your meaning to be is time =distance with in a parameter not need to be accounted for the porpoise of explaining the theory .,
interested it could be applied to formatting of crystal, the wave of the structure of the elements there atomic structure in a solid state = 0 bran state example a -+ pyramid = diamond -
Type "True Theory of Everything Quadrant Model of Reality 1" into YouTube for the Truth.
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Thanks for all the public lectures, I will now go and watch the angular momentum of my chocolate chip cookie and try to taste the vibration of its yummy multidimensional strings melting on my tongue :)
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No Professor, As I will go on the rubber band, I will never forget to go in the Y direction. Yours, Sigma.
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Once you learn all of string theory and m-theory that is available in the compendium of human knowledge, the fact remains that you can't do anything practical with it. If the theory was truly correct, wouldn't we already be masters of our own reality?
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There's a spectacular chapter in Brian Greene's first book Elegant Universe that gives an awesome narrative description of winding number of strings in the compact dimensions and the inability to distinguish between a world in which r>>1 and r<<1.
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he never covered M-theory
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Leonard Susskind is awesome. I Love His Work.
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Ha ha, now I`ve see all 10 of them :-D As Lenny Susskind says, You can call me g55 LOL Many happy thanks for this GREAT course
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This is such a privilege. Fight tooth and nail to keep these lectures on youtube. This is a type of video that is all too rare.
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