What is the difference between loop quantum gravity and string theory?
In loop quantum gravity, space-time is a network, and nodes replace the smooth background of Einstein’s theory of gravity. Loop quantum gravity studies bits; on the other hand, string theory studies the behavior of objects within space-time.
They are very different theories, that sometimes lead to the same conclusions or they answer questions that the other cannot. So, it was conjectured at one time that the two should be clearly related. However, this has never been realised. The two have different goals, string theory offers a potential unification scheme, while loop quantum gravity offers a potential theory of quantum gravity.
You should read Lee Smolin's "Three Roads to Quantum Gravity". He explains all this far better than anyone could here. You have asked a very wide question.
As of today there isn't any experimental support of any of these idea.
Karoly Kehrer , " As of today there isn't any experimental support of any of these idea ",
But they can be compared via their logic and math
Yes you are right the can be compared, but no compaction has any experimental support. It is the same problem like the problem of deity in any religions. Cannot be proved as disprove without physical prof of their existence.
Respectfully Dr. Karoly Kehrer
compaction was misspelled by the system, correctly COMPARISON
Sorry
Dear Alexandru Szel
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- Dr. Karoly Kehrer. Karoly for short.
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