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> String Theory, Various comments stareted by fattysmo
Solid State Universe
Posted: Jan 8 2007, 09:07 PM


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Aside from String Theory, most models have a bottom-up approach to constructing their theorems.

Perhaps a top-down approach might work better if String Theory wasn't trying so hard to find within the models provided for by GR?

Maybe the best solution would be to create your foundation by making an assumption about the nature of the Universe as a whole, then working down towards building a more complete picture that still encompasses the experimental results.


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AlphaNumeric
Posted: Jan 8 2007, 11:34 PM


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QUOTE (Solid State Universe @ Jan 8 2007, 10:07 PM)
Perhaps a top-down approach might work better if String Theory wasn't trying so hard to find within the models provided for by GR?

Can you explain what you mean by that? String theory isn't about finding a particle model within general relativity (that's more like Loop Quantum Gravity). String theory is about finding a particle physics model which produces general relativity as a 'side effect'. That is something it has been proven to do. String theory begins as a quantum field theory and it shows that general relativity is a result of such a model.
QUOTE (Solid State Universe @ Jan 8 2007, 10:07 PM)
Maybe the best solution would be to create your foundation by making an assumption about the nature of the Universe as a whole, then working down towards building a more complete picture that still encompasses the experimental results.
Again, that's what ST does. Start with the general claims :

A quantum field theory explains the universe
The quantum objects are extended objects
Both bosonic and fermionic particles exist

From such general assumptions about the nature of the universe, you get string theory's prediction of general relativity and other things. Now the problem is finding the right structure which gives particle behaviour seen in experiments. String theory already talks about particles, fields and interactions but they don't match experiment or are too vague.


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The views in the above post are those of its author and not those of the people who educated him through a degree and masters or those who currently supervise him during his PhD, have collaborated with him to write papers and pay him to teach and mark undergraduate mathematics and physics courses. Any insults, flames or rants are purely the work of the author and not the institutions of which he has or is or will be affiliated with.

Research areas : Non-geometric fluxes and Lie algebras in N=1 orientifolds. Mirror symmetry and torsion induced generalised complex geometries on N=2 twisted Calabi Yaus. Meson spectra and Goldstone modes of chirally symmetric D3/D7 brane configurations in AdS/CFT.

Erdos number = 5 and h index = 2 (gotta start somewhere!). Sadly my Bacon number is infinite.
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Zephir
Posted: Jan 9 2007, 12:08 AM


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QUOTE (AlphaNumeric @ Jan 9 2007, 02:34 AM)
...the problem is finding the right structure which gives particle behavior seen in experiments...

Such structure should always follow from the theory directly. It shouldn't be a free parameter. The foam structure of AWT is the result of the particle diffusion fluctuations and these particles are formed by condensation of the foam conversely. Quantum theory doesn't explain nothing, it just describes the set of phenomena observed in high magnification.

QUOTE (AlphaNumeric @ Jan 9 2007, 02:34 AM)
...A quantum field theory explains the universe...

Richard P. Feynman: "There was a time when the newspapers said that only twelve men understood the theory of relativity. I do not believe that there ever was such a time. There might have been a time when only one man did, because he was the only guy who caught on, before he wrote his paper. But after people read the paper a lot of people understood the theory of relativity in some way or other, certainly more than twelve. On the other hand, I think I can safely say that nobody understands quantum mechanics ."

This post has been edited by Zephir on Jan 9 2007, 12:43 AM


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AlphaNumeric
Posted: Jan 9 2007, 02:18 AM


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QUOTE (Zephir @ Jan 9 2007, 01:08 AM)
Such structure should always follow from the theory directly. It shouldn't be a free parameter.

But when you don't have the mathematical tools to see where your theory goes, it's kind of hard to see if it follows from the theory directly.
QUOTE (Zephir @ Jan 9 2007, 01:08 AM)
Richard P. Feynman:....
And the relevence is?


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The views in the above post are those of its author and not those of the people who educated him through a degree and masters or those who currently supervise him during his PhD, have collaborated with him to write papers and pay him to teach and mark undergraduate mathematics and physics courses. Any insults, flames or rants are purely the work of the author and not the institutions of which he has or is or will be affiliated with.

Research areas : Non-geometric fluxes and Lie algebras in N=1 orientifolds. Mirror symmetry and torsion induced generalised complex geometries on N=2 twisted Calabi Yaus. Meson spectra and Goldstone modes of chirally symmetric D3/D7 brane configurations in AdS/CFT.

Erdos number = 5 and h index = 2 (gotta start somewhere!). Sadly my Bacon number is infinite.
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Zephir
Posted: Jan 9 2007, 08:26 PM


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QUOTE (AlphaNumeric @ Jan 9 2007, 05:18 AM)
And the relevance is?

The relevance is, the QM cannot explain the Universe, until somebody will explain the quantum mechanic.


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Aether in one sentence: The particles of reality are formed by observation of reality through density fluctuations of particles of reality.
Please, have look at my posts history [http://superstruny.aspweb.cz] with full-text search before asking for details. Thank you!
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Zephir
Posted: Sep 13 2007, 11:39 PM


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Can string theory explain inflation?

A. Linde: "Why would you even try to describe inflation in a theory that cannot describe our universe?"


--------------------
Aether in one sentence: The particles of reality are formed by observation of reality through density fluctuations of particles of reality.
Please, have look at my posts history [http://superstruny.aspweb.cz] with full-text search before asking for details. Thank you!
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