Varying-$α$ Theories and Solutions to the Cosmological Problems

Details Varying-$α$ Theories and Solutions to the Cosmological Problems Varying-$α$ Theories and Solutions to the Cosmological Problems

1998-11-04

arxiv.org/abs/astro-ph/9811072v1

Phys.Lett. B443 (1998) 104-110

Astronomy and Astrophysics

Astrophysics

To be published in Physics Letters B

Scientific paper

10.1016/S0370-2693(98)01294-5

If the fine structure constant $\alpha =e^2/(\hbar c)$ were to change, then a number of interpretations would be possible, attributing this change either to variations in the electron charge, the dielectric constant of the vacuum, the speed of light, or Planck's constant. All these variations should be operationally equivalent and can be related by changes of standard units. We show how the varying speed of light cosmology recently proposed can be rephrased as a dielectric vacuum theory, similar to the one proposed by Bekenstein. The cosmological problems will therefore also be solved in such a theory.

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