New varying speed of light theories

@article{Magueijo2003NewVS,
  title={New varying speed of light theories},
  author={Jo{\~a}o Magueijo},
  journal={Reports on Progress in Physics},
  year={2003},
  volume={66},
  pages={2025-2068}
}
  • J. Magueijo
  • Published 23 May 2003
  • Physics
  • Reports on Progress in Physics
We review recent work on the possibility of a varying speed of light (VSL). We start by discussing the physical meaning of a varying-c, dispelling the myth that the constancy of c is a matter of logical consistency. We then summarize the main VSL mechanisms proposed so far: hard breaking of Lorentz invariance; bimetric theories (where the speeds of gravity and light are not the same); locally Lorentz invariant VSL theories; theories exhibiting a colour-dependent speed of light; varying-c… 

Figures from this paper

Varying Speed of Light in an Anisotropic Four-Dimensional Space
We show how the theory of relativity disagrees with the isotropy of the expanding universe and with the experimental arguments in favour of the existence of a preferred frame. We postulate a new
The minimally extended Varying Speed of Light (meVSL)
Even though there have been various models of the time-varying speed of light (VSL), they remain out of the mainstream because of their possible violation of physics laws built into fundamental
On the Relativity of the Speed of Light
Einstein's assumption that the speed of light is constant is a fundamental principle of modern physics with great influence. However, the nature of the principle of constant speed of light is rarely
Statistical hierarchy of varying speed of light cosmologies
Variation of the speed of light is quite a debated issue in cosmology with some benefits, but also with some controversial concerns. Many approaches to develop a consistent varying speed of light
Temporally varying universal gravitational “constant” and speed of light in energy momentum squared gravity
Energy momentum squared gravity (EMSG) (Roshan and Shojai in Phys Rev D 94:044002, 2016) is a cosmological model where the scale factor is non vanishing at all times and hence does not favor big-bang
Speed of Light as an Emergent Property of the Fabric
Problem - The theory of Relativity is premised on the constancy of the speed of light (c) in-vacuo. While no empirical evidence convincingly shows the speed to be variable, nonetheless from a
A Spatially-VSL Gravity Model with 1-PN Limit of GRT
In the static field configuration, a spatially-Variable Speed of Light (VSL) scalar gravity model with Lorentz-Poincaré interpretation was shown to reproduce the phenomenology implied by the
c is the speed of light, isn’t it?
Theories for a varying speed of light have been proposed as an alternative way of solving several standard cosmological problems. Recent observational hints that the fine structure constant may have
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 358 REFERENCES
Covariant and locally Lorentz-invariant varying speed of light theories
We propose definitions for covariance and local Lorentz invariance applicable when the speed of light $c$ is allowed to vary. They have the merit of retaining only those aspects of the usual
Stars and black holes in varying speed of light theories
We investigate spherically symmetric solutions to a recently proposed covariant and locally Lorentz-invariant varying speed of light theory. We find the metrics and variations in $c$ associated with
Does a varying speed of light solve the cosmological problems
Abstract We propose a new generalisation of general relativity which incorporates a variation in both the speed of light in vacuum (c) and the gravitational constant (G) and which is both covariant
Geometrodynamics of variable-speed-of-light cosmologies
Variable-speed-of-light (VSL) cosmologies are currently attracting interest as an alternative to inflation. We investigate the fundamental geometrodynamic aspects of VSL cosmologies and provide
Brane world cosmologies with varying speed of light
We study cosmologies in the Randall-Sundrum models, incorporating the possibility of time-varying speed of light and Newton’s constant. The cosmologies with varying speed of light (VSL) were proposed
Scale invariant spectrum from variable speed of light metric in a bimetric gravity theory
An approximately scale invariant spectrum generating the seeds of structure formation is derived from a bimetric gravity theory. By requiring that the amplitude of the CMB fluctuations from the model
On the varying speed of light in a brane-induced FRW universe
We investigate a string/M theoretic realization of the varying speed of light scenario. We consider a (3+1)-dimensional probe-brane universe in the background of a black hole in the bulk formed by a
Charge conservation and time-varying speed of light
It has been recently claimed that cosmologies with time dependent speed of light might solve some of the problems of the standard cosmological scenario, as well as in?ationary scenarios. In this
Cosmologies with varying light speed
We analyse a generalisation of general relativity that incorporates a cosmic time-variation of the velocity of light in vacuum, $c,$ and the Newtonian gravitation 'constant', $G,$ proposed by
BIMETRIC GRAVITY THEORY, VARYING SPEED OF LIGHT AND THE DIMMING OF SUPERNOVAE
In the bimetric scalar–tensor gravitational theory there are two frames associated with the two metrics ĝμν and gμν, which are linked by the gradients of a scalar field ϕ. The choice of a comoving
...
1
2
3
4
5
...