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Topic: Quantum gravity


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 Quantum Gravity Encyclopedia Article, Information, History and Biography @ InnerMan.com   (Site not responding. Last check: 2007-11-02)
Such a theory is required in order to understand those problems involving the combination of very large mass or energy and very small dimensions of space, such as the behavior of fl holes, and the origin of the universe.
Quantum field theory on curved (non-Minkowskian) backgrounds, while not a quantum theory of gravity, has shown that some of the assumptions of quantum field theory cannot be carried over to curved spacetime, let alone to full-blown quantum gravity.
Loop quantum gravity is the fruit of an effort to formulate a background-independent quantum theory.
www.innerman.com /encyclopedia/Quantum_gravity   (1335 words)

  
 Kids.net.au - Encyclopedia Loop quantum gravity -   (Site not responding. Last check: 2007-11-02)
Loop quantum gravity (LQG) is a proposed quantum theory of spacetime which seems to explain the seemingly incompatible theories of quantum mechanics and general relativity.
Previous theories of quantum mechanics, including string theory depended on exactly such a non-existent fixed spacetime background.
The recent result that gravity propagates at the speed of light is consistent with LQG.
www.kidsseek.com /encyclopedia-wiki/lo/Loop_quantum_gravity   (495 words)

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