It is an attempt to merge quantum mechanics and the General Theory of Relativity.For more details, I suggest you read at least the overview in the Wikipedia, article "Loop quantum gravity".
It is an attempt to merge quantum mechanics and the General Theory of Relativity.For more details, I suggest you read at least the overview in the Wikipedia, article "Loop quantum gravity".
It depends on what you mean by leading. A few good candidates are string theory, the standard model and loop quantum gravity.
The ISBN of Three Roads to Quantum Gravity is 0465078354.
Three Roads to Quantum Gravity has 196 pages.
The simple answer is Loop Quantum Gravity. I don't understand it that well, but it's the leading discretized space-time theory.
Three Roads to Quantum Gravity was created on 2001-06-05.
Unknown at this time. Neither is currently testable experimentally as predicted features are smaller than current measurement equipment can detect.
Quantum Loop, at Seabreeze Park in NY
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Noboru Nakanishi has written: 'Graph theory and Feynman integrals' -- subject(s): Feynman integrals, Graph theory 'Covariant operator formalism of gauge theories and quantum gravity' -- subject(s): Gauge fields (Physics), Quantum field theory, Quantum gravity
In a word. No. Grand unification is also commonly called the Theory of everything. Which in a sense, there would exist an equation of a set of equations that every other physics equation can be derived from. A quantum theory of gravity would only help to better blend quantum mechanics and classical mechanics, not necessarily leading to a theory of everything, though it would be another step toward it.
Einstein's work on the Photoelectric effect, which won him the Nobel prize in 1921 was a bulwark of Quantum Mechanics. Einstein went off in another direction because of his inate suspicion that Quantum Mechanics has severe internal difficulties. Quantum Mechanics and Relativity have not yet been reconciled--but they are moving together slowly. Quantum Gravity seems to be key to the issue and may be resolved by String Theory.