Lecture 3 | String Theory and M-Theory
About | Information | History | Online | Facts | Discovery
(October 4, 2010) Professor Leonard Susskind reviews harmonic oscillators, the spin of massless particles (photons and gravitons), the low lying spectrum of strings, the tachyon problem, and the basics of string interactions. 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
Comments
-
tachy- ... prefix meaning "swift or rapid": tachycardia, tachyphrenia, tachysystole
-
What a brilliant mind, this Mr. Susskind. I wish I could meet him just to have a coffee. I really admire his incredible and astonishing ability to see what others missed. I wish I could be half as brilliant. I accept that I'm not and will settle for praising his great mind. I wish politicians and lawyers were like this. They're totally the opposite.
-
I don't get it. Why would you spend 45 minutes+ on explaining the polarization of light, related mathematics, easy things to understand and brush over in 2 seconds how the holograpic principle in relation having some kind of connection to boosting the system relativistically in one (z) dimensions. Deggrees of freedom, etc... ???
-
Does anyone know where are the solutions to Theoretical Minimum book exercises after Lec6Ex5? It looks like the official site doesn't have them :o
-
All physics should have a rigorous proofs like that of mathematics that way all doubts are no more in physics.
-
For me, one of Dr. Susskind's best and most accessible lectures. Stanford thanks so much for sharing these!
-
Microphone level is a little hot. Thanks for another lecture.
-
Tachy= Fast!
-
Congratulations Susskind! And thanks very much, Stanford, for sharing this and other pieces of free education.
-
Wow! I wish I knew WTF he was saying . Brilliant man! Seriously!
-
Nice to see something less complicated then women
-
Anyone know the following: He said one can get rid of Tachyons but one cannot get rid of Photons. Now on the other hand he said Photons are represented by open strings and one can have closed strings without open strings. So one should also have stringtheories without a photon. This is somehow contradictory
-
+mirijason here susskind was describing the first excited states of the strings at rest, so it refers to rest mass being zero
-
graviton only exist with numbers & should act R L on axises ,gravity is a field load equaling & created by mass density. ,subspace< if the osculating photon is moving forward at the speed of light the rotating boundaries according to rotational , an 45deg helix than the pole, would have to be occluding by a faster faster than the speed of light & that external boundary oscillates to compensate for the extra energy tackieion ,why dose a single string not destroy its self?
-
Great professor, he's great.
-
Oh yes, what happens if 3 strings attach and form an Audi or 5 attach and form an Olimpic sign?
-
So can we have an oblect like a tennis racket having a string's end attaching to it's own middle and the other end wawing freely? ---O Let's call this the Super String pre Quantuum DNS theory.
-
Lose a chromosome.
0m 0sLenght
313Rating