String theory Definition and 782 Threads

For one of my classes, I am choosing to write a paper on either String Theory or the search for the theory of everything. The paper will not be very technical, rather it will deal with the effects of these theories, and how they will effect our planet, and the way we view life. These ideas...

Michael Dine just posted this "Is There a String Theory Landscape: Some Cautionary Notes" http://arxiv.org/hep-th/0402101 as a sample, here are the concluding remarks: "Mention of the anthropic principle brings out strong reactions from most physicists, who ask what can be the role of...

this just out http://arxiv.org/hep-th/0401172 quoting from the abstracts: The LQG -- String: Loop Quantum Gravity Quantization of String Theory I. Flat Target Space Authors: Thomas Thiemann Comments: 46 p. "We combine I. background independent Loop Quantum Gravity (LQG)...

I would like your comments on whether a model of EPR entanglement based on superstring theory makes any sense. Let's suppose we are concerned with understanding the entanglement of an electron/positron particle pair created at a point in an EPR experiment. The particles fly off in opposite...

Will string theory ever be proven wrong? can string theory ever be proven wrong? will or do we have the equipment to find out?

Here is where you can watch steaming video at the PBS website (it is a nova special)... they break it up for you into 24 videos that are average 7 mins each. I understood it a lot better after watching it on PBS and then watching it a second time on this site. there is some content that the...

This accusation is made by one physicist in the streaming video links provided by Integral [Thanks Integral! I had missed these shows when they aired and I was POed!]. I have heard or read similar statements elsewhere. As I understand the state of the theory, whatever its latest evolution is...

I am currently researching multi-dimensional models of the universe. The string theory allows for the possibility of a phenomenon called "gravity leaks" could someone expound upon this, and offer your thoughts on the following. Assuming for a moment that the multi-dimensional theory is proven...

Hi guys, I am new here. Just finished reading Brian Greene's book and I wrote this paper. I have no idea if it makes good sense but it sounded right at the time. I am a medical doctor and I know no physicists to review it. If I'm violating some sort of rule, please tell me. Thanks. The...

Okay I have to do a project on "the string theory." I've done some research on it using sources from the internet and some books--but I don't really understand what it exacly is. All of these things I have read explain it in such complex ways that make it difficult to grasp. I don't...

I just thought about it yesterday, and although is has been discussed here earlier, i'd like to raise the issue again. Can there really be more than one time dimension? so for instance, we could "circle around", come back, and pass through a moment we have already been through... it's quiet...

What is a string theory hype anyway?

I had originaly posted a thread on this theory in another forum, but I realize that it is better suited for this forum. In the attached file is a diagram of the string. In this string theory, strings are made of two opposite charges that exist within two extra dimentions. the dimentions have...

How and from what was string theory first formulated? I have heard that it was somehow connected with the attempt to unify General relativity and electromagnetism by introducing a fifth dimension, but I know little about the logical process which gave rise to string theory.

In sunny England, there is a 3 part tv programme type thingy on 'The Theory of Everything' in which string theory stars. I am one for embracing new ideas, but string theory sounds like a load of old hats to me. It may be the wishy-washy way that they present it with tons of special effects and...

"String Theory" in Physics? Do any of you guys know anything about or where I can find information about the "string theory" in physics? I can't find any information on it.

Do any of you guys know anything about or where I can find information about the "string theory" in physics? I can't find any information on it.

The following paper entitled Resource Letter: The Nature and Status of String Theory was authored by Donald Marolf at UCSB. It gives a useful annotated overview of string theory literature, both popular and technical. http://xxx.lanl.gov/abs/hep-th/0311044

can there be such an ST with BI?

At which scale in length terms does the Heisenburg Uncertainty Principle kick in for Stringtheory? In the string vibration for Gravitational interactions, as the scale is condensed, surely this would have a 'bigger' Uncertainty in strings that split off due to their proximity in scale...

If there is some kind of divine string formulation that could reveal the patterns of both fate and chaos, but ultimately it was born to encompass the relative world with the quantuum world, are we not left in a world of extreme order where chaos surrounds totality infinitely? IE the totality...

Hi, so I've just recently like really found out about string theory. I mean, I've seen posts around here on it, but I've never really followed them well. I was talk with my physics professor about some crazy thought i had and he was like "oh, string theory." heh... right, and here i thought i...

What kind of experimental predictions does String theory make that differs from the predictions that past theories (QT, SR, GR)make? Paden Roder

A recent paper details some new insights for the second quantized string field theory. This has some implications for future models, it appears to be quite sound, but this is based on a confined early viewpoint of a first once over reading, no doubt there will be more questions to follow...

It is my understanding that String Theory is an attempt at combining the quantum theories with relativity, correct? My question is, why is this considerd so difficult? What about the two separate theories (quantum and relativity) makes them so hard to combine? Do they oppose each other or something?

String theory as it has developed is not a field theory. It has more in common with Schroedinger's or Dirac's particle theories than with QED or the Standard Model. There is a real string field theory, and papers about it sometime appear on the arxiv. It started with Sen's conjectures about...

Was reading Baez's page and came across this link: http://math.ucr.edu/home/baez/week18.html It's somewhat interesting, have a read. :smile:

what the differences in the mathematical framework in the two theories? i know i heard that the maths of string theory is of 21th century (which is now).

In string theory, all particles and forces of nature of mere results of vibrating strings. Can LQG offer an alternative explanation for the zoo of particles we find? I seem to recall reading that the theory proposes that quarks are where edges of the lattice intersect, but I can't recall where...

Just wondering.

I'm seeking one single theory that ties in all mathematics together, ranging from simple artimetic to complex algebraic equations, which can be used universally for all applications - well, let me amend that: at least for common everyday functions. I'm certain there's one individual out there...

Anybody has a suggestion for a good book introducing string theory?