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Extended theories of gravity are alternative theories of gravity developed from the exact starting points investigated first by Albert Einstein and Hilbert...

f(R) is a type of modified gravity theory which generalizes Einstein's general relativity. f(R) gravity is actually a family of theories, each one defined...

predictions does any theory of quantum gravity make? (more unsolved problems in physics) Much of the difficulty in meshing these theories at all energy scales...

Loop quantum gravity (LQG) is a theory of quantum gravity that incorporates matter of the Standard Model into the framework established for the intrinsic...

relativity – Proposed theories of gravity Horndeski's theory Bimetric gravity – Proposed theories of gravity DGP model Scalar–tensor theory – Theory in physics with...

violations of the conservation laws in gravity theories with anomalies, concluding that type I string theories were inconsistent. Green and Schwarz discovered...

the speed of gravity. The effect of a finite speed of gravity goes to zero as c goes to infinity, but not as 1/c2 as it does in modern theories. This led...

theory coincides with Einstein's theory, but in higher dimensions the theories are different. In fact, for D > 4 Einstein gravity can be thought of as...

describe gravity. Gauge gravitation theory should not be confused with the similarly named gauge theory gravity, which is a formulation of (classical)...

find a theory of quantum gravity, the idea of a nontrivial fixed point providing a possible UV completion can be applied also to other field theories, in...

theories of quantum gravity, formulated in terms of string theory or M-theory. On the other side of the correspondence are conformal field theories (CFT)...

situations require that only one of the two theories be used.: 842–844  The two theories are considered incompatible in regions of extremely small scale – the...

relativity, also known as the general theory of relativity, and as Einstein's theory of gravity, is the geometric theory of gravitation published by Albert...

the article on classical unified field theories. The goal of a unified field theory has led to a great deal of progress for future theoretical physics...

and spatiality, the gravity model has been used to test hypotheses rooted in purer economic theories of trade as well. One such theory predicts that trade...

Goldberger, Walter; Rothstein, Ira (2004). "An Effective Field Theory of Gravity for Extended Objects". Physical Review D. 73 (10): 104029. arXiv:hep-th/0409156...

Yuan for Yang–Mills theory and gravity and subsequently for a variety of other theories. They were then understood as string theories in ambitwistor space...

: 198  Aether theories were alternative proposals to replace apparent action-at-a-distance in gravity and electromagnetism, in terms of continuous action...

strings are one-dimensional extended entities. Researchers often have an interest in string theories because theories in which the fundamental entities...

In theories of quantum gravity, the graviton is the hypothetical quantum of gravity, an elementary particle that mediates the force of gravitational interaction...