Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-12-30
Phys.Lett. B460 (1999) 263-270
Astronomy and Astrophysics
Astrophysics
15 pages, no figures, misprint corrections. Accepted for publication in Physics Letters B
Scientific paper
10.1016/S0370-2693(99)00774-1
A dynamical model for varying light velocity in cosmology is developed, based on the idea that there are two metrics in spacetime. One metric $g_{\mu\nu}$ describes the standard gravitational vacuum, and the other ${\hat g}_{\mu\nu} =g_{\mu\nu}+\beta\psi_\mu\psi_\nu$ describes the geometry through which matter fields propagate. Matter propagating causally with respect to $\hat{g}_{\mu\nu}$ can provide acausal contributions to the matter stress-energy tensor in the field equations for $g_{\mu\nu}$, which, as we explicitly demonstrate with perfect fluid and scalar field matter models, provides a mechanism for the solution of the horizon, flatness and magnetic monopole problems in an FRW universe. The field equations also provide a ``graceful exit'' to the inflationary epoch since below an energy scale (related to the mass of $\psi_\mu$) we recover exactly the standard FRW field equations.
Clayton Mike A.
Moffat John W.
No associations
LandOfFree
Dynamical Mechanism for Varying Light Velocity as a Solution to Cosmological Problems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dynamical Mechanism for Varying Light Velocity as a Solution to Cosmological Problems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical Mechanism for Varying Light Velocity as a Solution to Cosmological Problems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-583112