The Michigan nobel laureate Dr. Martinus Veltman who is a great teacher and also a man of great inspiration in high energy physics used to note in the class that quantum gravity has not been found to be renormalizable. If a quantum field theory is not renormalizable, its prediction can not be considered reliable. It basically means that quantum gravity is not a viable physical theory.
There can be several reasons for this. First and the foremost possibility is that gravity may not be a quantum phenomenon after all as I mentioned in the previous pages. Dipole gravity strongly suggests that gravity must be a bulk effect. If gravity is not a quantum phenomenon, any attempts to unify gravity with other forces of the nature will be fruitless.
It may not be a coincidence that quantum gravity hasn't provided a single testable predictions in the atomic level other than the quantum wormhole that no one knows how to create one. Also, I do not understand why quantum worm hole should be relevant to the macroscopic world even if it may exist in some kind of an unknown form.
I think the physics world has been pushed too far into letting believe plausible nonsenses that when the real physical theory came out, no one seems to be able to figure out what the real truth was or has been.
Physics is a discipline where you have to be able to mechanically imagine the situation no matter how complex the system may look like. Without the intuitive mechanical guidance, physics becomes a meta physics where no one knows for sure how the world is exactly operating.
When the quantum wormhole theory came out and the very concept was used as a main theme of a scifi movie, I was wondering if we are being totally detached from the common sense in a massive scale.
The current culture of physics is that if a calculation shows the correct result, with an accuracy of 10^-10 order, that should be enough for the validity of a physical theory that predicts it. It doesn't matter if the theory is mathematically or mechanical intuitively faulty.
The very fact that one has to subtract infinities from the calculation to make sense out of the theory is purely a mathematical nonsense. But for physicist it doesn't matter as far as the result justifies the means.
At this point, one should feel that there must be much more to it than quantum field theory in the world of physics.
Wednesday, November 21, 2007
Farce of Quantum Gravity
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