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thegreensquall
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i'm currently reading Hyperspace by michio kaku and it says that there are 10 dimensions in superstring theory, what are each of the dimensions?
Cexy said:So that's it - the extra six dimensions aren't space dimensions, or time dimensions. They're just 'extra' dimensions that are necessary for superstring theory to work.
straycat said:Suppose, then, that "the world of our everyday experience" had, not 4, but rather n dimensions. Would string theory have to be modified in some way to have not 10, but rather some different number m dimensions?
... so I have no idea in what manner string theory would have to be modified to accommodate an arbitrary number n of "everyday experience" dimensions. But maybe someone here might have some ideas. Anyone? ...
David
Chronos said:Any comments, Kea?
Agreed Kea, no boxes. I'm thinking intersections. By drawing one dimensional lines through all the intersections, you create the illusion of 3 dimensional space. When you rotate that along any axis, you create 4 dimensional spacetime. Which is to say you need a time coordinate to describe the apparent position of any intersection relative to all other intersections. Bear in mind you can rotate this coordinate system on multiple axes without creating a paradox.Kea said:Goodness, I'm no expert on Category Theory: just a struggling physicist. But I can tell you that Category Theory isn't just about putting things in boxes. If it was I can't see that it would be much use. However, the analogy is quite good in that it shows that everything we look at has a context. This is not an inconvenience, it is a physical law.
rtharbaugh1 said:There are two kinds of time in the world sheet, or so it seems to me. First there is the trace of the movement of the set along its world line. Then there is the operation of separation. Drat that word. Have I been misspelling it all along?
selfAdjoint said:Supersymmetry is usually presented in terms of the Standard Model particle set, but obviously this is not the appropriate context for its use in string theory. .
rtharbaugh1 said:All right. I guess I should have known that, from all the complaints about string theory making no predictions.
But I do find the following statement in WIKI:
"If the Large Hadron Collider and other major particle physics experiments fail to detect supersymmetric partners or evidence of extra dimensions, many version of string theory which had predicted certain low mass superpartners to existing particles may need to be significantly revised."
And much of the article in WIKI seems to go back and forth between superstring theory and the idea of supersymmetric partners for standard model particles.
However I do notice that this page of WIKI has been tagged for improvements. Here is the address:
http://en.wikipedia.org/wiki/Supersymmetry
Maybe this statement is part of the artical that needs revision.
Thanks,
R
The dimensions in string theory refer to the number of spatial dimensions in which particles and strings can vibrate. The most commonly accepted version of string theory requires that there be 10 dimensions, with 3 spatial dimensions (length, width, and height) and one time dimension being the most familiar to us in our everyday experience.
The extra dimensions in string theory are hypothesized to be compactified, meaning that they are extremely small and curled up on themselves. They are thought to be at a scale of around 10^-33 centimeters, making them impossible to detect with our current technology.
No, the extra dimensions in string theory are not parallel universes. They are a fundamental part of the theory that allows for the existence of particles and forces beyond what we currently understand. Parallel universes, on the other hand, are a concept in theoretical physics that suggests the existence of multiple universes that may have different physical laws and properties.
It is highly unlikely that we will ever be able to directly observe the extra dimensions in string theory. As mentioned before, they are thought to be incredibly small and curled up on themselves, making them impossible to detect with our current technology. However, scientists may be able to indirectly observe the effects of these dimensions through experiments and observations of particles and forces at extremely high energies.
String theory posits that particles are not tiny, point-like objects, but rather one-dimensional strings that vibrate at different frequencies. These vibrations correspond to different particles and their properties. In order for the equations of string theory to work, these strings require more than just the 4 dimensions we experience. The additional dimensions are necessary for the theory to be mathematically consistent and to explain the properties of particles and forces that we observe in our universe.