c is the speed of light, isn’t it?

By G. Ellis, Jean-Philippe Uzan. 2003

160 citations recorded by the source corpus.

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 varied over cosmological scales have given impetus to these theories. However, the speed of light is hidden in many physics equations and plays different roles in them. We discuss these roles to shed light on proposals for varying speed of light theories. We also emphasize the requirements for attaining consistency of the resulting equations, when what was previously a constant is made a dynamical variable.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/d2b95177fc405dca899ce1536b66fdf1e107bbb9

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

Lorentz violation at high energy: Concepts, phenomena, and astrophysical constraints (2005, background): “A set of related ideas goes under the generic name of “varying speed of light cosmologies” (VSL), which includes numerous distinct formulations [18,19].”
Varying Constants, Gravitation and Cosmology (2010, methodology): “This implies that only the variation of dimensionless constants can be measured and in case such a variation is detected, it is impossible to determine, which dimensional constant is varying [183].”
Issues in the Philosophy of Cosmology (2006, background): “ly, are very useful in constraining inhomogeneity by showing that conditions in the very early universe at the time of nucleosynthesis must have been the same at distant locations in these directions [82]. However turning this idea into a proper test of homogeneity has not succeeded so far: indeed i”
Analogue Gravity (2005, background): “If one of these metric is interpreted as the “gravitational” metric and the other as the “photon” metric, then VSL cosmologies can be given a mathematically well-defined and precise meaning [28, 108].”