Inflation and Global Equivalence
Abstract
This article investigates an extension of General Relativity based upon a class of lifted metrics on the cotangent bundle of spacetime. The dynamics of the theory is determined by a fixed section of the cotangent bundle, representing the momentum of a fluid flow, and Einstein's equations for the fluid applied to the induced spacetime metric on the submanifold of the cotangent bundle defined by the image of the section. This construction is formally analogous to the extension of Galilean Relativity by Special Relativity, and is shown to reduce to General Relativity as the gravitational constant approaches zero. By examining the consequences of the model for homogeneous cosmologies, it is demonstrated that this construction globalizes the equivalence principle, in that, the perfect fluid model of Special Relativity is sufficient to predict both the inflationary and the current era.
 Publication:

arXiv eprints
 Pub Date:
 September 2001
 arXiv:
 arXiv:grqc/0109082
 Bibcode:
 2001gr.qc.....9082M
 Keywords:

 General Relativity and Quantum Cosmology
 EPrint:
 16 pages, 1 eps figure, submitted for publication