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- Title
VARIABLE SPEED OF LIGHT COSMOLOGY AND BIMETRIC GRAVITY:: AN ALTERNATIVE TO STANDARD INFLATION.
- Authors
MOFFAT, J. W.
- Abstract
A scalar-tensor bimetric gravity model of early universe cosmology is reviewed. The metric frame with a variable speed of light (VSL) and a constant speed of gravitational waves is used to describe a Friedmann-Robertson-Walker universe. The Friedmann equations are solved for a radiation dominated equation of state and the power spectrum is predicted to be scale invariant with a scalar mode spectral index ns=0.97. The scalar modes are born in a ground state superhorizon and the fluctuation modes are causally connected by the VSL mechanism. The cosmological constant is equated to zero and there is no significant dependence on the scalar field potential energy. A possible way of distinguishing the bimetric gravity model from standard inflationary models is discussed.
- Subjects
METAPHYSICAL cosmology; GRAVITY waves; SPECTRUM analysis; SCALAR field theory; GRAVITY; POWER (Mechanics)
- Publication
International Journal of Modern Physics A: Particles & Fields; Gravitation; Cosmology; Nuclear Physics, 2005, Vol 20, Issue 6, p1155
- ISSN
0217-751X
- Publication type
Article
- DOI
10.1142/S0217751X05024031