Strings Definition and 523 Threads

"The Duel: Strings versus Loops" by Rudy Vaas http://arxiv.org./ftp/physics/papers/0403/0403112.pdf it's a 10-page popular article about the Strings meets Loops conference last October written for Bild der Wissenschaft (translated into English by Martin Bojowald and Amitaba Sen) Part...

Ok, I know about the search for supersymmetric partner particles (sparticles) and the tests on gravity variance at small scales, but what other tests are there that can be used to add proof to superstring theory?

I just recently started studying the string theory and I don't understand one major part. I can't find anything about what the strings exactly are. I think I have an idea from what I've read but I'm not sure. Now if anyone is considering answering this you have to know that I'm just a high...

how serious is this theory? has it been used to define GR or SR yet or even parts of it? it is exciting, actualy, because as a student of Mathmatics with an interest in physics, I have come to think that a theory of the universe that allows for mathmatical solutions dealling with infinity are...

Hi all! I'm in serious need of some help. The question: How many binary strings of length 10 contains exactly two "01"? My idea was to weld together 4 bits to 2 "01". That way, there's \frac{8!}{2!} strings with at least 2 "01". But there are a bunch of strings with more than 2 "01" in...

A string has two parts: one with a very high mass density (per unit length), and the other with a very low mass density. A wave with amplitude A moves from the dense part toward the light part. What will be the amplitude of the wave which is transmitted to the light part? hhegab

Do different points along a string travel faster than others points along the same string?

After recently seeing Brian Greene's "Elegant Universe," I was struck by an idea - maybe not an original idea, but an idea nonetheless. If gravity is a weak force because it is not stuck to the "brane" of this universe, then gravity from our universe can influence others and vice versa from...

I don't know to much about the string theory or loop theory really. I have read a few books on it, but I want to know: Why do scientists think any extra dimensions take the form of strings? Is it that the formula say that is what the strings are, or is it just a way to explain why we can't see...

I have the following problem Pulling up on a rope, you lift a 4.25-kg bucket of water from a well with an acceleration of 1.80 m/s². What is the tension in the rope? What part exactly does the acceleration play in this scenario?

At one time, I read where strings were vibrating bits of space-time. In "The Elegant Universe" TV program, they were described as vibrating bits of energy. In "The Elegant Universe" book they are described as consisting of fundamental "string stuff" and that questioning their composition...

Check my math! I've derived a differential equation for strings starting from Stokes Theorems to show that energy is conserved along the world-sheet. These diff eq's involve connection coefficients. And I'm not really sure what it all meants yet. I would appreciate it if some who are more...

Pardon me. I claim ignorance. Where do strings 'exist'? Either? 'String Space'? If so, is there space between on string and the next? What, if anything 'fills' the 'void'(s)? How can strings be fundamental if they have to lay in (some) dimension(s)? Do strings define themselves? If not, what...

do string make time or does time make strings , since strings have varoius vibrations, do there have a decay rate? just a question maybe one of you might know an answer?

It is an old observation that both LQG and string theory are fundamentally built from 1-dimensional objects. This is no coincidence. In general, every gauge theory can be formulated in terms of Wilson loops and these can often be described by "a" theory of strings. This was discussed in detail...

A while back I created a web page to describe an infinetly long straight cosmic string. http://www.geocities.com/physics_world/cosmic_string.htm Does anyone know if an exact solution for such a string has been fount. The result in that page is based on a paper which seems to have been...

please excuse my ignorance, i have read much about strings sometimes i even get a glimmer of understanding, the problem is i can not find referance to what a string is ok an electron is a point particle so a string is?

I've included a picture. Three strings, in the horizontal plane, meet in a knot and are pulled with three forces such that the knot is held stationary. The tension in string 1 is T1 = 3.6 N. The angle between strings 1 and 2 is 130° and the angle between strings 1 and 3 120° with string 3...

[SOLVED] Strings: 1 Universe: 0 If you enjoy potentially stupid questions, read on. If strings vibrate in x dimensions and if all matter is made of strings, then why do we not share those dimensions? Why does the universe remain in four-dimensional spacetime? Chances are I'm missing the...

John Baez just posted this announcement and tentative schedule for a conference this month at the Albert Einstein Institute (Max Planck Institute for Gravitation Physics) on the outskirts of Berlin. We have had several threads at PF studying work by AEI people---Hanno Sahlmann, Martin...

Does anyone know of any good problem solving books on strings, branes and/or loop quantum qravity? I am looking for something that has a lot of actual solved problems, something in the spirit of Schaum's Outline Series, Zetteli's book on QM, or Peskin and Schroeder's book on QFT. Any...

Hello, I think it's interesting to post here some interesting publications or pre-publication links related to String and Brane. http://arxiv.org/pdf/hep-ph/0306136 Title: On Superplanckian Scattering on the Brane Authors: A.V. Kisselev 3 Transplanckian collision on the brane In the...

Pantheistic Strings & Mystical QM Einstein was cannonized as a saint by the Navaho nation for his theory of Relativity. The Navaho's have no future tense, no verb to be, in their language and their worldview is very relativistic. Much of native american religion shares the exact same artwork...