Bimetric theory

Bimetric theory

Bimetric theory refers to a class of modified theories of gravity in which two metric tensors are used instead of one. Often the second metric is introduced at high energies, with the implication that the speed of light may be energy dependent.

In general relativity, it is assumed that the distance between two points in spacetime is given by the metric tensor. Einstein's field equations are then used to calculate the form of the metric based on the distribution of energy.

ee also

*Relativity

References

External links


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • Nordström's theory of gravitation — In theoretical physics, Nordström s theory of gravitation was a predecessor of general relativity. Strictly speaking, there were actually two distinct theories proposed by the Finnish theoretical physicist Gunnar Nordström, in 1912 and 1913… …   Wikipedia

  • Nonsymmetric gravitational theory — In theoretical physics, the nonsymmetric gravitational theory[1] (NGT) of John Moffat is a classical theory of gravitation which tries to explain the observation of the flat rotation curves of galaxies. In general relativity, the gravitational… …   Wikipedia

  • Alternatives to general relativity — are physical theories that attempt to describe the phenomena of gravitation in competition to Einstein s theory of general relativity.There have been many different attempts at constructing an ideal theory of gravity. These attempts can be split… …   Wikipedia

  • Альтернативные теории гравитации — Альтернативными теориями гравитации принято называть теории гравитации, существующие как альтернативы общей теории относительности (ОТО) или существенно (количественно или принципиально) модифицирующие ее. К альтернативным теориям гравитации… …   Википедия

  • МОНД — Альтернативными теориями гравитации принято называть теории гравитации, существующие как альтернативы общей теории относительности или существенно (количественно или принципиально) модифицирующие ее. К альтернативным теориям гравитации часто… …   Википедия

  • Parameterized post-Newtonian formalism — Post Newtonian formalism is a calculational tool that expresses Einstein s (nonlinear) equations of gravity in terms of the lowest order deviations from Newton s theory. This allows approximations to Einstein s equations to be made in the case of …   Wikipedia

  • History of general relativity — Creation of General Relativity Early investigations As Albert Einstein later said, the reason for the development of general relativity was that the preference of inertial motions within special relativity was unsatisfactory, while a theory which …   Wikipedia

  • General relativity — For a generally accessible and less technical introduction to the topic, see Introduction to general relativity. General relativity Introduction Mathematical formulation Resources …   Wikipedia

  • Loop quantum gravity — Not to be confused with the path integral formulation of LQG, see spin foam. This article is about LQG in its Canonical formulation.. Beyond the Standard Model …   Wikipedia

  • Modified Newtonian dynamics — MOND redirects here. For other uses, see Mond. In physics, Modified Newtonian dynamics (MOND) is a hypothesis that proposes a modification of Newton s law of gravity to explain the galaxy rotation problem. When the uniform velocity of rotation of …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”